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MySQL search and replace some text in a field
...REPLACE(field, 'foo', 'bar') WHERE INSTR(field, 'foo') > 0;
REPLACE (string functions)
INSTR (string functions)
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Magic number in boost::hash_combine
...1, and with no simple correlation between the bits. A common way to find a string of such bits is to use the binary expansion of an irrational number; in this case, that number is the reciprocal of the golden ratio:
phi = (1 + sqrt(5)) / 2
2^32 / phi = 0x9e3779b9
So including this number "randoml...
Binary Data in JSON String. Something better than Base64
...ry data. The binary data has to be escaped so that it can be placed into a string element (i.e. zero or more Unicode chars in double quotes using backslash escapes) in JSON.
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“Order by Col1, Col2” using entity framework
...ment IComparable" error message when used with EntityFramework Core on two string fields.
– sixtstorm1
Nov 20 '17 at 21:20
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php stdClass to array
...were using json_decode() on an array. json_decode should be used on a JSON string. Therefore, if we encode it as a JSON string first (json_encode) and then decode it (using our JSON string), then it works fine.
– h2ooooooo
Sep 2 '13 at 15:56
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push_back vs emplace_back
...::map<int, Complicated> m;
int anInt = 4;
double aDouble = 5.0;
std::string aString = "C++";
// cross your finger so that the optimizer is really good
m.insert(std::make_pair(4, Complicated(anInt, aDouble, aString)));
// should be easier for the optimizer
m.emplace(4, anInt, aDouble, aStrin...
How to get the month name in C#?
...nsole.Read();
}
}
static class DateTimeExtensions
{
public static string ToMonthName(this DateTime dateTime)
{
return CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(dateTime.Month);
}
public static string ToShortMonthName(this DateTime dateTime)
{
re...
How can I get query string values in JavaScript?
Is there a plugin-less way of retrieving query string values via jQuery (or without)?
73 Answers
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Does .asSet(…) exist in any API?
...with Java 8 you can do this without need of third-party framework:
Set<String> set = Stream.of("a","b","c").collect(Collectors.toSet());
See Collectors.
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C++ compiling on Windows and Linux: ifdef switch [duplicate]
... someone looking same in Qt
In Qt
https://wiki.qt.io/Get-OS-name-in-Qt
QString Get::osName()
{
#if defined(Q_OS_ANDROID)
return QLatin1String("android");
#elif defined(Q_OS_BLACKBERRY)
return QLatin1String("blackberry");
#elif defined(Q_OS_IOS)
return QLatin1String("ios");
#elif defin...