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Why do people use __(double underscore) so much in C++
... Rules and Recommendations :
The use of two underscores (`__') in identifiers is reserved for the compiler's internal use according to the ANSI-C standard.
Underscores (`_') are often used in names of library functions (such as "_main" and "_exit"). In order to avoid collisions, do not begi...
Purpose of Unions in C and C++
...lier comfortably; today I was alarmed when I read this post and came to know that this code
15 Answers
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Setting up two different static directories in node.js Express framework
Is it possible? I would like to set up two different directories to serve static files. Let's say /public and /mnt
4 Answer...
Avoid duplicates in INSERT INTO SELECT query in SQL Server
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Just a clarification on the NOT EXISTS version, you'll need a WITH(HOLDLOCK) hint or no locks will be taken (because there are no rows to lock!) so another thread could insert the row under you.
– IDisposable
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add column to mysql table if it does not exist
... MySQL prior to 5.0. Nor are stored procedures supported prior to 5.0, so if you need to support MySQL 4.1, this solution isn't good.
One solution used by frameworks that use database migrations is to record in your database a revision number for the schema. Just a table with a single column and ...
Disable button in jQuery
...iddle has it set up, it seems -- you can "inspect element" in your browser if you want to analyze exactly what's happening.
– Blazemonger
Feb 28 '13 at 20:13
1
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How to remove all debug logging calls before building the release version of an Android app?
...See also the examples in the ProGuard manual.
Update (4.5 years later): Nowadays I used Timber for Android logging.
Not only is it a bit nicer than the default Log implementation — the log tag is set automatically, and it's easy to log formatted strings and exceptions — but you can also spec...
how to check and set max_allowed_packet mysql variable [duplicate]
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@YusufIbrahim Short answer: I don't know. But a quick scan of this article suggests that it should be possible.
– morphatic
Nov 29 '19 at 18:54
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(this == null) in C#!
...t should NOT be possible. You are not allowed to write : base(CheckNull()) if CheckNull is not static, and alike you should not be able to inline an instance-bound lambda.
– quetzalcoatl
Aug 14 '12 at 0:29
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mongo group query how to keep fields
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If you want to keep the information about the first matching entries for each group, you can try aggregating like:
db.test.aggregate({
$group: {
_id : '$name',
name : { $first: '$name' },
age : { $first: '$age' },...