How to create an small array from large array in javascript

Question

I am using jquery.bracket lib. I want to seperate an large array in pairs like ["'Team 1', 'Team 2'"],["'Team 3', 'Team 4'"] from

var all= ["'Team 1', 'Team 2'","'Team 3', 'Team 4'"]

I have tried this method:

var longArray = all;   
var shortArrays = [], i, len;
for (i = 0, len = longArray.length; i < len; i += 1) {
    shortArrays.push(longArray.slice(i, i +1));
}

Following is the code example. I want to call array in this function:

var saveData = {
    teams: shortArrays,
}

I want ["Team 1","Team 2"],["Team 3","Team 4"] in shortArray. Your help will be much appreciated.

["'Team 1', 'Team 2'"],["'Team 3', 'Team 4'"] is not the same as ["Team 1","Team 2"],["Team 3","Team 4"] - What should the output be exactly? — Andreas
– Andreas, Commented Sep 24, 2015 at 8:20
while Debugging it shows ["'Team 1'",""'Team 2'"] and i have to Pass ['Team1','Team 2'] — Rohil Patel
– Rohil Patel, Commented Sep 24, 2015 at 8:43
var bigData = { teams : [ ["'Team 1', 'Team 2'"],["'Team 3', 'Team 4'"], ], } This what the exact Format i need in shortArray — Rohil Patel
– Rohil Patel, Commented Sep 24, 2015 at 8:44
["'Team 1'",""'Team 2'"] this is a syntax error. You really have to be more careful when posting information... — Andreas
– Andreas, Commented Sep 24, 2015 at 9:29

Amit Joki · Accepted Answer · 2015-09-24 08:22:14Z

2

You can use Array.splice which modifies by adding or removing the elements in array.

while(longArray.length) // make sure that array has something
      shortArrays.push(longArray.splice(0, 2)); // push the removed items

The Type Signature of Array.splice is

array.splice(start, deleteCount[, item1[, item2[, ...]]])

and it removes the first two elements in this case from the array, and returns it, which we push in the shortArrays.

edited Sep 24, 2015 at 8:22

answered Sep 24, 2015 at 8:18

Amit Joki

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2 Comments

Alexandr Lazarev Over a year ago

Add one more bracket after splice(0, 2).

Amit Joki Over a year ago

@RohilPatel there was a typo. I had typed in shortArray instead of shortArrays

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