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Populating An Array In JavaScript

JavaScript:

I am trying to populate an array.

var blocks = [];
var blocksCount = 7;
for (var columnIndex = 0; columnIndex < blocksCount; columnIndex++) {
 for (var rowIndex = 0; rowIndex < blocksCount; rowIndex++) {
 blocks[columnIndex][rowIndex] = 'Some Value';
 }
}

The error message says: undefined is not an object!

What do I have to change to make it work?

Answer*

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  • what is || ?? Commented Jan 15, 2017 at 19:11
  • It is an OR operator , it means , if the value on the left hand side to || is defined then it will be assigned to blocks[columnIndex] OR its value will be the one on the right side i.e [] Commented Jan 15, 2017 at 19:14
  • No problem. Happy to help :) Commented Jan 15, 2017 at 19:16

lang-js

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