Combining two arrays with for loops

Question

var number = [1,2,3,4];
var assignment= ["first", "second", "third", "fourth"];

I need to combine these two arrays so that it console logs this information like so:

1 first
2 second
3 third
4 fourth

Thank you.

1

have you tried any code? – Agam Banga May 14 '17 at 04:55

score 1 · Accepted Answer · answered May 14 '17 at 05:04

You can combine them like

var number = [1,2,3,4]; var assignment= ["first", "second", "third", "fourth"];
// alert (number[i] + " = " + assignment[number[i]-1]);
// change "i" as desired
alert (number[0] + " = " + assignment[number[0]-1]);

Now you can loop and combine them like this,

var number = [1,2,3,4]; var assignment= ["first", "second", "third", "fourth"];
for(var i=0;i<4;i++)
{
  alert (number[i] + " = " + assignment[number[i]-1]);
}

I you want a string, you can do something like this,

var number = [1,2,3,4]; var assignment= ["first", "second", "third", "fourth"];
var txt = "";
for(var i=0;i<4;i++)
{
  txt = txt + (number[i] + " = " + assignment[number[i]-1] + " ");
}
alert(txt);

Nice one, with more than one example, that's a yes yes :) – developer_hatch May 14 '17 at 05:10 — developer_hatch, May 14 '17 at 05:10

developer_hatch · Answer 2 · 2017-05-14T05:10:00.790

0

If the arrays has the same leght, it should do the work

var number = [1,2,3,4];
var assignment= ["first", "second", "third", "fourth"];
var result = new Array(number.length)
for(var i=0;i<number.length;i++){
    result[i] = (number[i] + " " + assignment[i]);
}

then you can print them

edited May 14 '17 at 05:10

answered May 14 '17 at 05:00

developer_hatch

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score 0 · Answer 3 · answered May 14 '17 at 05:05

The following will work as long as the arrays are equal in size:

var number = [1,2,3,4];
var assignment = ["one","two","three","four"];
var size = number.count;
for(var i=0; i<size; i++){
    var log = number[i] + " " + assignment[i];
    console.log(log);
}

score 0 · Answer 4 · answered May 14 '17 at 05:38

Try forEach:

var arr = [];
var number = [1, 2, 3, 4];
var assignment = ["first", "second", "third", "fourth"];
var i = 0;
number.forEach(function(e) {
  arr.push(e + ' ' + assignment[i++])
});
console.info(arr)

WARNING: We assume the arrays size are equal

Combining two arrays with for loops

4 Answers4