javascript foreach
const avengers = ['thor', 'captain america', 'hulk'];
avengers.forEach((item, index)=>{
console.log(index, item)
})javascript foreach
const avengers = ['thor', 'captain america', 'hulk'];
avengers.forEach((item, index)=>{
console.log(index, item)
})foreach javascript
let words = ['one', 'two', 'three', 'four'];
words.forEach((word) => {
console.log(word);
});
// one
// two
// three
// fourforeach javascript
var items = ["item1", "item2", "item3"]
var copie = [];
items.forEach(function(item){
copie.push(item);
});foreach javascript
let names = ['josh', 'joe', 'ben', 'dylan'];
// index and sourceArr are optional, sourceArr == ['josh', 'joe', 'ben', 'dylan']
names.forEach((name, index, sourceArr) => {
console.log(color, idx, sourceArr)
});
// josh 0 ['josh', 'joe', 'ben', 'dylan']
// joe 1 ['josh', 'joe', 'ben', 'dylan']
// ben 2 ['josh', 'joe', 'ben', 'dylan']
// dylan 3 ['josh', 'joe', 'ben', 'dylan']string foreach javascript
//for
str='hello'
for (var i = 0; i < str.length; i++) {
console.info(str[i]);
}
//for...of
let result1 = '';
for (let letter of str) {
result1 += letter;
}
console.log(`for...of : ${result1}`)
//forEach
// ES6 version.
let result2 = '';
str.split('').forEach(letter => {
result2 += letter;
});
console.log(`forEach ES6 : ${result2}`)
//or
var result3 = '';
str.split('').forEach(function(letter) {
result3 += letter;
});
console.log(`forEach standard : ${result3}`)
//for...in
var result4 = '';
for (var letterIndex in str) {
result4 += str[letterIndex];
}
console.log(`for...in : ${result4}`)
//map
// ES6 version.
var result5 = '';
str.split('').map(letter => {
result5 += letter;
});
console.log(`map ES6 : ${result5}`)
//or
let result6 = '';
str.split('').map(function(letter) {
result6 += letter;
});
console.log(`map standard : ${result6}`)foreach javascript
let colors = ['red', 'blue', 'green'];
// idx and sourceArr optional; sourceArr == colors
colors.forEach(function(color, idx, sourceArr) {
console.log(color, idx, sourceArr)
});Copyright © 2021 Codeinu
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