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Type-juggling and (strict) greater/lesser-than comparisons in PHP
...g NAN is always false is not specific to PHP. It is mandated by the IEEE 754 Standard for Floating-Point Arithmetic (more info).
PHP's == operator is symmetric, i.e. $a == $b and $b == $a are always the same.
PHP's == operator is not transitive, i.e. from $a == $b and $b == $c does not follows $a ==...
IEnumerable to string [duplicate]
...r sequence on a 32-bit release build:
ToArrayString: 00:00:03.1695463
Concat: 00:00:07.2518054
StringBuilderChars: 00:00:03.1335455
StringBuilderStrings: 00:00:06.4618266
static readonly IEnumerable<char> seq = Enumerable.Repeat('a', 300);
static string ToArrayStrin...
How do I get current date/time on the Windows command line in a suitable format for usage in a file/
... with using date . See @npocmaka's https://stackoverflow.com/a/19799236/8479
28 Answers
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Is short-circuiting logical operators mandated? And evaluation order?
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4
Didn't know short-circuiting wouldn't apply to overloaded logic ops, that's intesting. Can you please add a reference to the standard, or a ...
Elegant way to invert a map in Scala
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174
Assuming values are unique, this works:
(Map() ++ origMap.map(_.swap))
On Scala 2.8, however,...
The 'json' native gem requires installed build tools
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54
I believe those installers make changes to the path. Did you try closing and re-opening the CMD...
Run PostgreSQL queries from the command line
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504
psql -U username -d mydatabase -c 'SELECT * FROM mytable'
If you're new to postgresql and unfam...
Why should we typedef a struct so often in C?
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464
As Greg Hewgill said, the typedef means you no longer have to write struct all over the place....
What is the best way to tell if a character is a letter or number in Java without using regexes?
... AdamAdam
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13
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Count the number of occurrences of a string in a VARCHAR field?
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346
This should do the trick:
SELECT
title,
description,
ROUND (
(
...