I have 2 arrays, say arr1=[A,B,C,D];
and arr2= [a,b,c,d];
I want to create a third array by combining these 2 in the following way:
arr3= [A,a,B,b,C,c,D,d];
How can I achieve this using jquery? Please help!
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1Define exactly how you're ordering the elements in the final array. Alphabetical, or do you just want to alternate between arr1 and arr2?Blazemonger– Blazemonger2014-05-15 13:59:37 +00:00Commented May 15, 2014 at 13:59
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Just want to alternate between arr1 and arr2. In exact way as shown in the question.user3641092– user36410922014-05-15 14:03:12 +00:00Commented May 15, 2014 at 14:03
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6 Answers
Try to use jquery's $.merge(array1,array2) function,
var arr3 = $.merge( arr1, arr2 )
DEMO
For the format you have asked,
var arr1=['A','B','C','D'];
var arr2=['a','b','c','d'];
var arr3 = [];
for(var i=0,len=arr1.length;i<len;i++){
arr3[arr3.length] = arr1[i];
arr3[arr3.length] = arr2[i];
}
alert(arr3);
DEMO I
answered May 15, 2014 at 13:57
Rajaprabhu Aravindasamy
67.2k17 gold badges107 silver badges133 bronze badges
5 Comments
gen_Eric
This won't put it in the order shown in the question.
Blazemonger
Note that, according to the docs,
arr1 will be altered by this operation.Rajaprabhu Aravindasamy
@RocketHazmat Yeah, that's true. but op just asked how to combine two arrays.
gen_Eric
He did ask for it to be in a certain format, though.
Rajaprabhu Aravindasamy
@RocketHazmat answered. :)
If you just want to alternate elements between the two arrays, and that they're always equal in length:
arr3 = [];
for (var i=0,j=arr1.length; i<j; i++) {
arr3.push(arr1[i]);
arr3.push(arr2[i]);
}
Comments
It can be done in one string by using merge function.
The new array will be returned without altering merged arrays:
var arr3 = $.merge($.merge([], arr1), arr2);
Comments
you can use $.merge function as
$(document).ready(function(){
var arr1=['a','b'];
var arr2=['c','d'];
console.log($.merge(arr1,arr2));
});
Comments
This will interleave two arrays of any length, and return the result. No jquery required.
function interleave(a,b) {
c=[];
tot=a.length+b.length;
while (c.length<tot) {
if (aa=a.shift()) {
c.push(aa);
}
if (bb=b.shift()) {
c.push(bb);
}
}
return c;
}
If you want to merge two arrays and sort alphabetically, try this (also no jquery)
arr3=arr1.concat(arr2).sort()
Comments
You can interleave two arrays using the recursive function below. This method will work whether or not the arrays are the same length:
var z = (a, b) => a.length ? [a[0], ...z(b, a.slice(1))] : b;
var arr1 = ["A", "B", "C", "D"];
var arr2 = ["a", "b", "c", "d"];
var arr3 = z(arr1, arr2);
console.log(JSON.stringify(arr3));or for any number of arrays, use this:
var z = (a = [], ...b) =>
b.length ? a.length ? [a[0], ...z(...b, a.slice(1))] : z(...b) : a;
var array1 = [1, 2];
var array2 = '♦♡♣♤♥♢';
var array3 = ['A', 'B', 'C'];
var array4 = ['😊', '😔', '😠'];
var array5 = [null, NaN, undefined];
var stringify = (o) => JSON.stringify(o, (k, v) => v === undefined ? '__undefined__' : v !== v ? '__NaN__' : v).replace(/"__undefined__"/g, 'undefined').replace(/"__NaN__"/g, 'NaN');
console.log(stringify(z()));
console.log(stringify(z(array1)));
console.log(stringify(z(array1, array2)));
console.log(stringify(z(array1, array2, array3)));
console.log(stringify(z(array1, array2, array3, array4)));
console.log(stringify(z(array1, array2, array3, array4, array5)));