Getting the first characters of each string in an array in Javascript
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let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
for(animal = 0; animal <= animals.length-1; animal++) {
return animals[animal].charAt(animal);
}
});
console.log(secretMessage.join(''));
Hi, thru this piece of code i want to output the string HelloWorld, which is formed by the first characters of each string/element in the animals array. However, the output is instead HHHHHHHHHH. I don't know if the for loop is the problem here?
Could someone please tell me why the code produces such an output and how i can modify it in order for the desired result to be returned successfully?
I'm just a novice for now & that's why your help will play a tremendous part in my growth as a programmer. Thanks in advance!
javascript arrays loops
edited Oct 31 '17 at 13:07
Sandeep Sukhija
8311021
asked Oct 31 '17 at 12:43
jack coltranejack coltrane
1816
add a comment |
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
for(animal = 0; animal <= animals.length-1; animal++) {
return animals[animal].charAt(animal);
}
});
console.log(secretMessage.join(''));
Hi, thru this piece of code i want to output the string HelloWorld, which is formed by the first characters of each string/element in the animals array. However, the output is instead HHHHHHHHHH. I don't know if the for loop is the problem here?
Could someone please tell me why the code produces such an output and how i can modify it in order for the desired result to be returned successfully?
I'm just a novice for now & that's why your help will play a tremendous part in my growth as a programmer. Thanks in advance!
javascript arrays loops
edited Oct 31 '17 at 13:07
Sandeep Sukhija
8311021
asked Oct 31 '17 at 12:43
jack coltranejack coltrane
1816
Possible duplicate of How to read first character of string inside an array without using string.charAt()?
– shawon191
Oct 31 '17 at 12:49
animals.map(function(s) { return s[0]; }).join("");
– Yogesh Chuahan
Oct 31 '17 at 13:01
add a comment |
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
for(animal = 0; animal <= animals.length-1; animal++) {
return animals[animal].charAt(animal);
}
});
console.log(secretMessage.join(''));
Hi, thru this piece of code i want to output the string HelloWorld, which is formed by the first characters of each string/element in the animals array. However, the output is instead HHHHHHHHHH. I don't know if the for loop is the problem here?
Could someone please tell me why the code produces such an output and how i can modify it in order for the desired result to be returned successfully?
I'm just a novice for now & that's why your help will play a tremendous part in my growth as a programmer. Thanks in advance!
javascript arrays loops
edited Oct 31 '17 at 13:07
Sandeep Sukhija
8311021
asked Oct 31 '17 at 12:43
jack coltranejack coltrane
1816
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
for(animal = 0; animal <= animals.length-1; animal++) {
return animals[animal].charAt(animal);
}
});
console.log(secretMessage.join(''));
Hi, thru this piece of code i want to output the string HelloWorld, which is formed by the first characters of each string/element in the animals array. However, the output is instead HHHHHHHHHH. I don't know if the for loop is the problem here?
Could someone please tell me why the code produces such an output and how i can modify it in order for the desired result to be returned successfully?
I'm just a novice for now & that's why your help will play a tremendous part in my growth as a programmer. Thanks in advance!
javascript arrays loops
javascript arrays loops
edited Oct 31 '17 at 13:07
Sandeep Sukhija
8311021
asked Oct 31 '17 at 12:43
jack coltranejack coltrane
1816
edited Oct 31 '17 at 13:07
Sandeep Sukhija
8311021
asked Oct 31 '17 at 12:43
jack coltranejack coltrane
1816
edited Oct 31 '17 at 13:07
Sandeep Sukhija
8311021
edited Oct 31 '17 at 13:07
Sandeep Sukhija
8311021
edited Oct 31 '17 at 13:07
Sandeep Sukhija
8311021
8311021
asked Oct 31 '17 at 12:43
jack coltranejack coltrane
1816
asked Oct 31 '17 at 12:43
jack coltranejack coltrane
1816
asked Oct 31 '17 at 12:43
jack coltranejack coltrane
1816
1816
Possible duplicate of How to read first character of string inside an array without using string.charAt()?
– shawon191
Oct 31 '17 at 12:49
animals.map(function(s) { return s[0]; }).join("");
– Yogesh Chuahan
Oct 31 '17 at 13:01
add a comment |
Possible duplicate of How to read first character of string inside an array without using string.charAt()?
– shawon191
Oct 31 '17 at 12:49
animals.map(function(s) { return s[0]; }).join("");
– Yogesh Chuahan
Oct 31 '17 at 13:01
Possible duplicate of How to read first character of string inside an array without using string.charAt()?
– shawon191
Oct 31 '17 at 12:49
Possible duplicate of How to read first character of string inside an array without using string.charAt()?
– shawon191
Oct 31 '17 at 12:49
animals.map(function(s) { return s[0]; }).join("");
– Yogesh Chuahan
Oct 31 '17 at 13:01
animals.map(function(s) { return s[0]; }).join("");
– Yogesh Chuahan
Oct 31 '17 at 13:01
add a comment |
8 Answers
8
active
oldest
votes
Map is a for loop in and of itself.
Try:
// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.map((animal) => animal[0]).join('')
// Log.
console.log(secretMessage) // "HelloWorld"Or alternatively:
// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.reduce((accumulator, animal) => accumulator + animal[0], '')
// Log.
console.log(secretMessage) // "HelloWorld"answered Oct 31 '17 at 12:47
Arman CharanArman Charan
3,29821121
add a comment |
The map method does the for loop for you. So all you need in the function is animal[0]
let secretMessage = animals.map(function(animal) {
return animal[0]
});
This will return every first character in every string in the array, animals. Everything else you have is right.
answered Oct 31 '17 at 14:19
Joseph CarrickJoseph Carrick
312
add a comment |
You don't need inner loop:
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0); // or simply animal[0]
});
console.log(secretMessage.join(''));answered Oct 31 '17 at 12:46
dfsqdfsq
168k21184213
add a comment |
The error here is that you have a loop inside the map function, which already loops the array.
The correct code is
animals.map(x=>x[0]).join('');
//or
animals.map(function(animal){
return animal[0]; //First letter of word
}).join(''); //Array -> String
answered Oct 31 '17 at 12:46
Luca De NardiLuca De Nardi
1,500624
add a comment |
This should be the code:
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0);
});
console.log(secretMessage.join(''));
answered Oct 31 '17 at 12:46
Kenji MukaiKenji Mukai
60148
add a comment |
Just do this.
let animals = [
'Hen', 'elephant', 'llama',
'leopard', 'ostrich', 'Whale',
'octopus', 'rabbit', 'lion', 'dog'
];
console.log(animals.map(e => e[0]).join(""));answered Oct 31 '17 at 12:46
marmeladzemarmeladze
4,39131433
1
For ES5 or less use this: animals.map(function(s) { return s[0]; }).join(""); For ES6: () => { }
– Yogesh Chuahan
Oct 31 '17 at 13:02
add a comment |
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animals) {
return animals[0];
});
console.log(secretMessage.join(''));
or
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(animals => animals[0]);
console.log(secretMessage.join(''));
answered Mar 30 '18 at 15:08
Kenny HeenatigalaKenny Heenatigala
12
add a comment |
.map() array function take callback function as an argument and return new array so that can use this method to get our result see the syntax below:
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
const secretMessage = animals.map(animals => {
return animals[0];
})
console.log(secretMessage.join(''));
now when .map method is applied on the animals array its return only the first element of the each string because we use animals[0] which read only first element of each string so our output is HelloWorld
edited Nov 23 '18 at 6:13
Ram Ghadiyaram
17.6k84980
answered Nov 23 '18 at 6:07
Mukesh SutharMukesh Suthar
11
add a comment |
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8 Answers
8
active
oldest
votes
8 Answers
8
active
oldest
votes
active
oldest
votes
active
oldest
votes
Map is a for loop in and of itself.
Try:
// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.map((animal) => animal[0]).join('')
// Log.
console.log(secretMessage) // "HelloWorld"Or alternatively:
// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.reduce((accumulator, animal) => accumulator + animal[0], '')
// Log.
console.log(secretMessage) // "HelloWorld"answered Oct 31 '17 at 12:47
Arman CharanArman Charan
3,29821121
add a comment |
Map is a for loop in and of itself.
Try:
// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.map((animal) => animal[0]).join('')
// Log.
console.log(secretMessage) // "HelloWorld"Or alternatively:
// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.reduce((accumulator, animal) => accumulator + animal[0], '')
// Log.
console.log(secretMessage) // "HelloWorld"answered Oct 31 '17 at 12:47
Arman CharanArman Charan
3,29821121
add a comment |
Map is a for loop in and of itself.
Try:
// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.map((animal) => animal[0]).join('')
// Log.
console.log(secretMessage) // "HelloWorld"Or alternatively:
// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.reduce((accumulator, animal) => accumulator + animal[0], '')
// Log.
console.log(secretMessage) // "HelloWorld"answered Oct 31 '17 at 12:47
Arman CharanArman Charan
3,29821121
Map is a for loop in and of itself.
Try:
// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.map((animal) => animal[0]).join('')
// Log.
console.log(secretMessage) // "HelloWorld"Or alternatively:
// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.reduce((accumulator, animal) => accumulator + animal[0], '')
// Log.
console.log(secretMessage) // "HelloWorld"// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.map((animal) => animal[0]).join('')
// Log.
console.log(secretMessage) // "HelloWorld"// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.map((animal) => animal[0]).join('')
// Log.
console.log(secretMessage) // "HelloWorld"// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.reduce((accumulator, animal) => accumulator + animal[0], '')
// Log.
console.log(secretMessage) // "HelloWorld"// Animals.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog']
// Secret Message.
const secretMessage = animals.reduce((accumulator, animal) => accumulator + animal[0], '')
// Log.
console.log(secretMessage) // "HelloWorld"answered Oct 31 '17 at 12:47
Arman CharanArman Charan
3,29821121
edited May 10 '18 at 7:53
answered Oct 31 '17 at 12:47
Arman CharanArman Charan
3,29821121
answered Oct 31 '17 at 12:47
Arman CharanArman Charan
3,29821121
answered Oct 31 '17 at 12:47
Arman CharanArman Charan
3,29821121
3,29821121
add a comment |
add a comment |
The map method does the for loop for you. So all you need in the function is animal[0]
let secretMessage = animals.map(function(animal) {
return animal[0]
});
This will return every first character in every string in the array, animals. Everything else you have is right.
answered Oct 31 '17 at 14:19
Joseph CarrickJoseph Carrick
312
add a comment |
The map method does the for loop for you. So all you need in the function is animal[0]
let secretMessage = animals.map(function(animal) {
return animal[0]
});
This will return every first character in every string in the array, animals. Everything else you have is right.
answered Oct 31 '17 at 14:19
Joseph CarrickJoseph Carrick
312
add a comment |
The map method does the for loop for you. So all you need in the function is animal[0]
let secretMessage = animals.map(function(animal) {
return animal[0]
});
This will return every first character in every string in the array, animals. Everything else you have is right.
answered Oct 31 '17 at 14:19
Joseph CarrickJoseph Carrick
312
The map method does the for loop for you. So all you need in the function is animal[0]
let secretMessage = animals.map(function(animal) {
return animal[0]
});
This will return every first character in every string in the array, animals. Everything else you have is right.
answered Oct 31 '17 at 14:19
Joseph CarrickJoseph Carrick
312
answered Oct 31 '17 at 14:19
Joseph CarrickJoseph Carrick
312
answered Oct 31 '17 at 14:19
Joseph CarrickJoseph Carrick
312
answered Oct 31 '17 at 14:19
Joseph CarrickJoseph Carrick
312
312
add a comment |
add a comment |
You don't need inner loop:
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0); // or simply animal[0]
});
console.log(secretMessage.join(''));answered Oct 31 '17 at 12:46
dfsqdfsq
168k21184213
add a comment |
You don't need inner loop:
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0); // or simply animal[0]
});
console.log(secretMessage.join(''));answered Oct 31 '17 at 12:46
dfsqdfsq
168k21184213
add a comment |
You don't need inner loop:
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0); // or simply animal[0]
});
console.log(secretMessage.join(''));answered Oct 31 '17 at 12:46
dfsqdfsq
168k21184213
You don't need inner loop:
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0); // or simply animal[0]
});
console.log(secretMessage.join(''));let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0); // or simply animal[0]
});
console.log(secretMessage.join(''));let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0); // or simply animal[0]
});
console.log(secretMessage.join(''));answered Oct 31 '17 at 12:46
dfsqdfsq
168k21184213
answered Oct 31 '17 at 12:46
dfsqdfsq
168k21184213
answered Oct 31 '17 at 12:46
dfsqdfsq
168k21184213
answered Oct 31 '17 at 12:46
dfsqdfsq
168k21184213
168k21184213
add a comment |
add a comment |
The error here is that you have a loop inside the map function, which already loops the array.
The correct code is
animals.map(x=>x[0]).join('');
//or
animals.map(function(animal){
return animal[0]; //First letter of word
}).join(''); //Array -> String
answered Oct 31 '17 at 12:46
Luca De NardiLuca De Nardi
1,500624
add a comment |
The error here is that you have a loop inside the map function, which already loops the array.
The correct code is
animals.map(x=>x[0]).join('');
//or
animals.map(function(animal){
return animal[0]; //First letter of word
}).join(''); //Array -> String
answered Oct 31 '17 at 12:46
Luca De NardiLuca De Nardi
1,500624
add a comment |
The error here is that you have a loop inside the map function, which already loops the array.
The correct code is
animals.map(x=>x[0]).join('');
//or
animals.map(function(animal){
return animal[0]; //First letter of word
}).join(''); //Array -> String
answered Oct 31 '17 at 12:46
Luca De NardiLuca De Nardi
1,500624
The error here is that you have a loop inside the map function, which already loops the array.
The correct code is
animals.map(x=>x[0]).join('');
//or
animals.map(function(animal){
return animal[0]; //First letter of word
}).join(''); //Array -> String
answered Oct 31 '17 at 12:46
Luca De NardiLuca De Nardi
1,500624
answered Oct 31 '17 at 12:46
Luca De NardiLuca De Nardi
1,500624
answered Oct 31 '17 at 12:46
Luca De NardiLuca De Nardi
1,500624
answered Oct 31 '17 at 12:46
Luca De NardiLuca De Nardi
1,500624
1,500624
add a comment |
add a comment |
This should be the code:
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0);
});
console.log(secretMessage.join(''));
answered Oct 31 '17 at 12:46
Kenji MukaiKenji Mukai
60148
add a comment |
This should be the code:
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0);
});
console.log(secretMessage.join(''));
answered Oct 31 '17 at 12:46
Kenji MukaiKenji Mukai
60148
add a comment |
This should be the code:
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0);
});
console.log(secretMessage.join(''));
answered Oct 31 '17 at 12:46
Kenji MukaiKenji Mukai
60148
This should be the code:
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animal) {
return animal.charAt(0);
});
console.log(secretMessage.join(''));
answered Oct 31 '17 at 12:46
Kenji MukaiKenji Mukai
60148
answered Oct 31 '17 at 12:46
Kenji MukaiKenji Mukai
60148
answered Oct 31 '17 at 12:46
Kenji MukaiKenji Mukai
60148
answered Oct 31 '17 at 12:46
Kenji MukaiKenji Mukai
60148
60148
add a comment |
add a comment |
Just do this.
let animals = [
'Hen', 'elephant', 'llama',
'leopard', 'ostrich', 'Whale',
'octopus', 'rabbit', 'lion', 'dog'
];
console.log(animals.map(e => e[0]).join(""));answered Oct 31 '17 at 12:46
marmeladzemarmeladze
4,39131433
1
For ES5 or less use this: animals.map(function(s) { return s[0]; }).join(""); For ES6: () => { }
– Yogesh Chuahan
Oct 31 '17 at 13:02
add a comment |
Just do this.
let animals = [
'Hen', 'elephant', 'llama',
'leopard', 'ostrich', 'Whale',
'octopus', 'rabbit', 'lion', 'dog'
];
console.log(animals.map(e => e[0]).join(""));answered Oct 31 '17 at 12:46
marmeladzemarmeladze
4,39131433
1
For ES5 or less use this: animals.map(function(s) { return s[0]; }).join(""); For ES6: () => { }
– Yogesh Chuahan
Oct 31 '17 at 13:02
add a comment |
Just do this.
let animals = [
'Hen', 'elephant', 'llama',
'leopard', 'ostrich', 'Whale',
'octopus', 'rabbit', 'lion', 'dog'
];
console.log(animals.map(e => e[0]).join(""));answered Oct 31 '17 at 12:46
marmeladzemarmeladze
4,39131433
Just do this.
let animals = [
'Hen', 'elephant', 'llama',
'leopard', 'ostrich', 'Whale',
'octopus', 'rabbit', 'lion', 'dog'
];
console.log(animals.map(e => e[0]).join(""));let animals = [
'Hen', 'elephant', 'llama',
'leopard', 'ostrich', 'Whale',
'octopus', 'rabbit', 'lion', 'dog'
];
console.log(animals.map(e => e[0]).join(""));let animals = [
'Hen', 'elephant', 'llama',
'leopard', 'ostrich', 'Whale',
'octopus', 'rabbit', 'lion', 'dog'
];
console.log(animals.map(e => e[0]).join(""));answered Oct 31 '17 at 12:46
marmeladzemarmeladze
4,39131433
edited Oct 31 '17 at 12:52
answered Oct 31 '17 at 12:46
marmeladzemarmeladze
4,39131433
answered Oct 31 '17 at 12:46
marmeladzemarmeladze
4,39131433
answered Oct 31 '17 at 12:46
marmeladzemarmeladze
4,39131433
4,39131433
1
For ES5 or less use this: animals.map(function(s) { return s[0]; }).join(""); For ES6: () => { }
– Yogesh Chuahan
Oct 31 '17 at 13:02
add a comment |
1
For ES5 or less use this: animals.map(function(s) { return s[0]; }).join(""); For ES6: () => { }
– Yogesh Chuahan
Oct 31 '17 at 13:02
1
1
For ES5 or less use this: animals.map(function(s) { return s[0]; }).join(""); For ES6: () => { }
– Yogesh Chuahan
Oct 31 '17 at 13:02
For ES5 or less use this: animals.map(function(s) { return s[0]; }).join(""); For ES6: () => { }
– Yogesh Chuahan
Oct 31 '17 at 13:02
add a comment |
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animals) {
return animals[0];
});
console.log(secretMessage.join(''));
or
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(animals => animals[0]);
console.log(secretMessage.join(''));
answered Mar 30 '18 at 15:08
Kenny HeenatigalaKenny Heenatigala
12
add a comment |
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animals) {
return animals[0];
});
console.log(secretMessage.join(''));
or
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(animals => animals[0]);
console.log(secretMessage.join(''));
answered Mar 30 '18 at 15:08
Kenny HeenatigalaKenny Heenatigala
12
add a comment |
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animals) {
return animals[0];
});
console.log(secretMessage.join(''));
or
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(animals => animals[0]);
console.log(secretMessage.join(''));
answered Mar 30 '18 at 15:08
Kenny HeenatigalaKenny Heenatigala
12
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(function(animals) {
return animals[0];
});
console.log(secretMessage.join(''));
or
let animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let secretMessage = animals.map(animals => animals[0]);
console.log(secretMessage.join(''));
answered Mar 30 '18 at 15:08
Kenny HeenatigalaKenny Heenatigala
12
answered Mar 30 '18 at 15:08
Kenny HeenatigalaKenny Heenatigala
12
answered Mar 30 '18 at 15:08
Kenny HeenatigalaKenny Heenatigala
12
answered Mar 30 '18 at 15:08
Kenny HeenatigalaKenny Heenatigala
12
12
add a comment |
add a comment |
.map() array function take callback function as an argument and return new array so that can use this method to get our result see the syntax below:
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
const secretMessage = animals.map(animals => {
return animals[0];
})
console.log(secretMessage.join(''));
now when .map method is applied on the animals array its return only the first element of the each string because we use animals[0] which read only first element of each string so our output is HelloWorld
edited Nov 23 '18 at 6:13
Ram Ghadiyaram
17.6k84980
answered Nov 23 '18 at 6:07
Mukesh SutharMukesh Suthar
11
add a comment |
.map() array function take callback function as an argument and return new array so that can use this method to get our result see the syntax below:
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
const secretMessage = animals.map(animals => {
return animals[0];
})
console.log(secretMessage.join(''));
now when .map method is applied on the animals array its return only the first element of the each string because we use animals[0] which read only first element of each string so our output is HelloWorld
edited Nov 23 '18 at 6:13
Ram Ghadiyaram
17.6k84980
answered Nov 23 '18 at 6:07
Mukesh SutharMukesh Suthar
11
add a comment |
.map() array function take callback function as an argument and return new array so that can use this method to get our result see the syntax below:
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
const secretMessage = animals.map(animals => {
return animals[0];
})
console.log(secretMessage.join(''));
now when .map method is applied on the animals array its return only the first element of the each string because we use animals[0] which read only first element of each string so our output is HelloWorld
edited Nov 23 '18 at 6:13
Ram Ghadiyaram
17.6k84980
answered Nov 23 '18 at 6:07
Mukesh SutharMukesh Suthar
11
.map() array function take callback function as an argument and return new array so that can use this method to get our result see the syntax below:
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
const secretMessage = animals.map(animals => {
return animals[0];
})
console.log(secretMessage.join(''));
now when .map method is applied on the animals array its return only the first element of the each string because we use animals[0] which read only first element of each string so our output is HelloWorld
edited Nov 23 '18 at 6:13
Ram Ghadiyaram
17.6k84980
answered Nov 23 '18 at 6:07
Mukesh SutharMukesh Suthar
11
edited Nov 23 '18 at 6:13
Ram Ghadiyaram
17.6k84980
edited Nov 23 '18 at 6:13
Ram Ghadiyaram
17.6k84980
edited Nov 23 '18 at 6:13
Ram Ghadiyaram
17.6k84980
17.6k84980
answered Nov 23 '18 at 6:07
Mukesh SutharMukesh Suthar
11
answered Nov 23 '18 at 6:07
Mukesh SutharMukesh Suthar
11
answered Nov 23 '18 at 6:07
Mukesh SutharMukesh Suthar
11
11
add a comment |
add a comment |
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Possible duplicate of How to read first character of string inside an array without using string.charAt()?
– shawon191
Oct 31 '17 at 12:49
animals.map(function(s) { return s[0]; }).join("");
– Yogesh Chuahan
Oct 31 '17 at 13:01