How I concat arrays if I have "i" number of arrays
var i = numberOfarrays;
so now I have to do something like that:
bigArray = row[0].concat(row[1]).concat(row[2])... ...concat(row[i]);
How I can concat i number of arrays?
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do you want to store all elemnents in a main array??HIRA THAKUR– HIRA THAKUR2013-07-30 13:28:31 +00:00Commented Jul 30, 2013 at 13:28
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yes to stor all arrays ibto one bigMark West– Mark West2013-07-30 13:31:07 +00:00Commented Jul 30, 2013 at 13:31
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3 Answers
You can do this :
var bigArray = Array.prototype.concat.apply([], row)
which can be reduced to
var bigArray = [].concat.apply([], row)
Fiddle : http://jsfiddle.net/qGVJe/
1 Comment
Vadim
+1 I've just deleted my post with exactly the same solution, you posted it 50 secs earlier :)
Try this,
var row = [[1,2],[3,4],[5,6]]
var bigArray=[];
for(i=0;i<row.length;i++)
bigArray= bigArray.concat(row[i]);
2 Comments
Denys Séguret
You should try... concat doesn't work like you think it works.
Ian
It still seems unnecessary to use
concat like this. What you're after is push. concat shouldn't need to be used like this in an loop, especially because it creates/returns a new array every concat callSample:
var a = ['1','2','3'];
var b = ['4','5','6'];
var final_array = a.concat(b);
//console.log shows final_array is now an an array with: ['1','2','3','4','5','6']
Apply:
bigArray=[];
for(i=0;i<small_array.length;i++){
bigArray.concat(small_array[i]);
}
or
for(i=0;i<small_array.length;i++){
bigArray.push(small_array[i]);
}
