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PHP - Modify current object in foreach loop
... recommended even though this is shorter (see comment by Paystey)
Per the PHP foreach documentation:
In order to be able to directly modify array elements within the loop precede $value with &. In that case the value will be assigned by reference.
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What is the most efficient/elegant way to parse a flat table into a tree?
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Now that MySQL 8.0 supports recursive queries, we can say that all popular SQL databases support recursive queries in standard syntax.
WITH RECURSIVE MyTree AS (
SELECT * FROM MyTable WHERE ParentId IS NULL
UNION ALL
SELECT m.* FROM MyTABLE AS m JOIN MyTree AS t ON m.ParentI...
How to convert an enum type variable to a string?
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There really is no beautiful way of doing this. Just set up an array of strings indexed by the enum.
If you do a lot of output, you can define an operator<< that takes an enum parameter and does the lookup for you.
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Redis消息通知系统的实现 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...技术细节，其中演示代码如果没有特殊说明，使用的都是PhpRedis扩展来实现的。内...最近忙着用Redis实现一个消息通知系统，今天大概总结了一下技术细节，其中演示代码如果没有特殊说明，使用的都是PhpRedis扩展来实现的。
内...
C++: what regex library should I use? [closed]
... slated to become part of the C++0x standard (it's already in TR1).
Personally, I find Boost.Xpressive much nicer to work with. It is a header-only library and it has some nice features such as static regexes (regexes compiled at compile time).
Update: If you're using a C++11 compliant compiler (g...
Is there a REAL performance difference between INT and VARCHAR primary keys?
... and a coworker won't budge on the INT AUTO_INCREMENT as a primary key for all tables.
14 Answers
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PHP: How to use array_filter() to filter array keys?
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PHP 5.6 introduced a third parameter to array_filter(), flag, that you can set to ARRAY_FILTER_USE_KEY to filter by key instead of value:
$my_array = ['foo' => 1, 'hello' => 'world'];
$allowed = ['foo', 'bar'];
$filte...
How to Convert Boolean to String
...at the type of the return value is; it may be boolean or something else. (Calling a function someone else wrote during debugging.) Your solution converts $res to boolean, whereas var_export can handle all possible types.
– user2443147
Jun 15 '14 at 18:47
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Formatting a number with leading zeros in PHP [duplicate]
... from the page linked above, here's a sample "zero-padded integers":
<?php
$isodate = sprintf("%04d-%02d-%02d", $year, $month, $day);
?>
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How do I tidy up an HTML file's indentation in VI?
How do I fix the indentation of his huge html files which was all messed up?
11 Answers
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