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#pragma once vs include guards? [duplicate]
I'm working on a codebase that is known to only run on windows and be compiled under Visual Studio (it integrates tightly with excel so it's not going anywhere). I'm wondering if I should go with the traditional include guards or use #pragma once for our code. I would think letting the compiler de...
Regex to check whether a string contains only numbers [duplicate]
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var reg = /^\d+$/;
should do it. The original matches anything that consists of exactly one digit.
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What is the difference between null and undefined in JavaScript?
...defined // true
null === null // true
and
null = 'value' // ReferenceError
undefined = 'value' // 'value'
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How do I prevent node.js from crashing? try-catch doesn't work
From my experience, a php server would throw an exception to the log or to the server end, but node.js just simply crashes. Surrounding my code with a try-catch doesn't work either since everything is done asynchronously. I would like to know what does everyone else do in their production servers.
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What is an initialization block?
We can put code in a constructor or a method or an initialization block. What is the use of initialization block? Is it necessary that every java program must have it?
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typeof !== “undefined” vs. != null
I often see JavaScript code which checks for undefined parameters etc. this way:
11 Answers
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Effects of the extern keyword on C functions
In C, I did not notice any effect of the extern keyword used before function declaration.
At first, I thought that when defining extern int f(); in a single file forces you to implement it outside of the file's scope. However I found out that both:
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How to do case insensitive string comparison?
How do I perform case insensitive string comparison in JavaScript?
22 Answers
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Is there a way to reduce the size of the git folder?
...what you want. First of all, of course each time you commit/push the directory is going to get a little larger, since it has to store each of those additional commits.
However, probably you want git gc which will "cleanup unnecessary files and optimize the local repository" (manual page).
Another ...
Why aren't pointers initialized with NULL by default?
... developer did not do it at the declaration point was he/she needed to perform some operation and then assign.
So now we have the situation that the compiler has added an extra instruction to the code that initializes the variable to NULL then later the developer code is added to do the correct ini...