Answers for "foreach javascript syntax"

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
// four

foreach 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)
});