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Questions tagged [square-bracket]

The symbols "[" and "]", commonly used in programming languages. Please use this tag only if the specific usage of these symbols is a relevant part of the question.

Overview

The square brackets "[" and "]" are special cases of brackets, along with parentheses and curly brackets (or braces) ("{", "}").

Uses

Square brackets have many uses in most programming languages, such as:

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extJS - when-to & when-not to use square brackets

i have been learning extJS, and i could cram it up but i want to understand... in the following cases we use square brackets, if not it gives error require : ['Ext.container.Viewport'] controllers : ['Users','List'] but in these we…
Moon
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Meaning of two double brackets ([][]) in Java

What is the role of a pair of double brackets ([][]) in Java? reference code(Leetcode 1351. Count Negative Numbers in a Sorted Matrix): class Solution { public int countNegatives(int[][] grid) { final int m = grid.length; final int n =…
Abhishek Thakur
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How does this overloading of square brackets work

I want to avoid printing space (" ") or an underscore ("_") after the last element of an array while printing them using a for loop. The problem mentions one of the way to do so, I want to understand how and why this happens. vector v1 =…
Faizan Ahmed
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Square brackets problem in GET form method

I'm working on a form in my aaa.php file, with checkboxes using square brackets in the "name" parameter :
The form…
Fabien Nguyen
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Error reading JSON file containing square brackets in Python

I need to modify the values of a JSON file that is being used by another program. It looks like this: [ { "ENABLED": "True", "NAME": "Cage", "CODE": "3928273", "COLOR": "Green" } ] This causes my script (below) to throw errors. It works…
jedi2191
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I'm just wondering if anyone could clarify why Square Brackets are being used during a Function call-back in JavaScript?

So, I'm currently working my way through JavaScript and often find myself getting the 'information overload' block regarding information... I was hoping someone could clarify for me that why, if I write the below Function, upon its call-back I…
Mike
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overload square bracket operator with private nested class

I want to overload the square bracket operator [] using a private nested class to differentiate between v[i] = val and val = v[i]
user3233447
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What does this for loop with undefined terms inside brackets mean in python?

I have a mathematics code in python and need to convert it to java. But I can't konw how to work this: #python source sum([d**2 for d in (x - y)]) x,y are arrays and defined and have value. I have trouble with the for loop and the connexion with…
behnam heidary
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Perl: Meaning of double squared brackets after a string?

I don't understand a seemingly basic piece of code in Perl, which looks like this: $line[$k][1] What is the meaning of the double squared brackets? I'm sorry if this was already asked or is so basic it can be found in every beginners book for Perl.…
Volker Gröller
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