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MYSQL OR vs IN performance
...ir "opinion", science is all about testing and evidence.
I ran a loop of 1000x the equivalent queries (for consistency, I used sql_no_cache):
IN: 2.34969592094s
OR: 5.83781504631s
Update:
(I don't have the source code for the original test, as it was 6 years ago, though it returns a result in th...
What Content-Type value should I send for my XML sitemap?
...xml registration in Section 3.2).
For text/xml:
Conformant with [RFC2046], if a text/xml entity is received with
the charset parameter omitted, MIME processors and XML processors
MUST use the default charset value of "us-ascii"[ASCII]. In cases
where the XML MIME entity is transmitted v...
How to delete a row by reference in data.table?
...
answered May 29 '12 at 0:20
Matt DowleMatt Dowle
54.6k2020 gold badges157157 silver badges210210 bronze badges
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Draw Circle using css alone [duplicate]
... circle (25CF).
.circle:before {
content: ' \25CF';
font-size: 200px;
}
<span class="circle"></span>
I suggest this as border-radius won't work in IE8 and below (I recognize the fact that the suggestion is a bit mental).
...
Converting an integer to a string in PHP
...
800
You can use the strval() function to convert a number to a string.
From a maintenance perspecti...
Avoiding if statement inside a for loop?
...gt;
void for_each_indexed(const Container& c, Functor f, Index index = 0) {
for (const auto& e : c)
f(index++, e);
}
int main() {
using namespace std;
set<char> s{'b', 'a', 'c'};
// indices starting at 1 instead of 0
for_each_indexed(s, [](size_t i, cha...
Why does string::compare return an int?
...e short or char ? My understanding is that this method only returns -1, 0 or 1.
9 Answers
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Convert Existing Eclipse Project to Maven Project
...
140
If you just want to create a default POM and enable m2eclipse features: so I'm assuming you do n...
How do I encode/decode HTML entities in Ruby?
...Successfully installed htmlentities-4.2.4
: jmglov@laurana; irb
irb(main):001:0> require 'htmlentities'
=> []
irb(main):002:0> HTMLEntities.new.decode "&iexcl;I&#39;m highly&nbsp;annoyed with character references!"
=> "¡I'm highly annoyed with character references!"
...
Casting vs using the 'as' keyword in the CLR
...
The answer below the line was written in 2008.
C# 7 introduced pattern matching, which has largely replaced the as operator, as you can now write:
if (randomObject is TargetType tt)
{
// Use tt here
}
Note that tt is still in scope after this, but not definit...