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What differences, if any, between C++03 and C++11 can be detected at run-time?
...led with a C++ compiler, will return 1 (the trivial sulution with
#ifdef __cplusplus is not interesting).
8 Answers
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How to check if a string contains a substring in Bash
...ble quotes, and the * wildcards should be outside. Also note that a simple comparison operator is used (i.e. ==), not the regex operator =~.
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Extract month and year from a zoo::yearmon object
... I'd add a zoo-free answer for ts as well.
# create an example Date
date_1 <- as.Date("1990-01-01")
# extract year
as.numeric(format(date_1, "%Y"))
# extract month
as.numeric(format(date_1, "%m"))
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Program only crashes as release build — how to debug?
...o a program. You can turn the debug heap off by using environment variable _NO_DEBUG_HEAP . You can specify this either in your computer properties, or in the Project Settings in Visual Studio. That might make the crash reproducible with the debugger attached.
More on debugging heap corruption her...
Random number generator only generating one random number
...nly Random Global = new Random();
[ThreadStatic] private static Random _local;
public int Next(int max)
{
var localBuffer = _local;
if (localBuffer == null)
{
int seed;
lock(Global) seed = Global.Next();
localBuffer = new Rand...
How do I enable EF migrations for multiple contexts to separate databases?
...Delete any existing .cs files in the Migrations folder
In SSMS, delete the __MigrationHistory system table.
Creating the initial migration:
In Package Manager Console:
Enable-Migrations -EnableAutomaticMigrations -ContextTypeName
NamespaceOfContext.ContextA -ProjectName ProjectContextIsInIfNotM...
Get MIME type from filename extension
...isting above has 560 mappings. Oddly, the MS listing is missing extremely common MS extensions even, like .docx and .xlsx and other important web extensions like .csv, .swf, and .air.
– Samuel Neff
Jan 2 '13 at 4:52
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How to get orientation-dependent height and width of the screen?
... edited May 23 '17 at 12:02
Community♦
111 silver badge
answered Oct 26 '11 at 16:10
SamSam
...
How do I add options to a DropDownList using jQuery?
...M object.
var myOptions = {
val1 : 'text1',
val2 : 'text2'
};
var _select = $('<select>');
$.each(myOptions, function(val, text) {
_select.append(
$('<option></option>').val(val).html(text)
);
});
$('#mySelect').append(_select.html());
This way we...
Is there any overhead to declaring a variable within a loop? (C++)
...s initialized but never used, so a reasonable optimiser can just remove it completely (except the second snippet if the variable was used somewhere after the loop).
– CiaPan
Dec 4 '16 at 20:27
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