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How to check that an element is in a std::set?
...s with std::set, other STL containers, and even fixed-length arrays:
void test()
{
std::set<int> set;
set.insert(1);
set.insert(4);
assert(!contains(set, 3));
int set2[] = { 1, 2, 3 };
assert(contains(set2, 3));
}
Edit:
As pointed out in the comments, I unintention...
regex for zip-code
...nal explanation.
RegEx Circuit
jex.im visualizes regular expressions:
Test
const regex = /^\d{5}[-\s]?(?:\d{4})?$/gm;
const str = `12345
12345-6789
12345 1234
123451234
12345 1234
12345 1234
1234512341
123451`;
let m;
while ((m = regex.exec(str)) !== null) {
// This is ne...
MySQL show current connection info
... 5.5.8, for Win32 (x86)
Connection id: 1
Current database: test
Current user: ODBC@localhost
SSL: Not in use
Using delimiter: ;
Server version: 5.5.8 MySQL Community Server (GPL)
Protocol version: 10
Connection: localhost ...
PHP Difference between array() and []
...
Following [] is supported in PHP >= 5.4:
['name' => 'test', 'id' => 'theID']
This is a short syntax only and in PHP < 5.4 it won't work.
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Immutable vs Unmodifiable collection
...urce collection changes unModifiable Collection will always present with latest values.
However immutable Collection can be treated as a readonly copy of another collection and can not be modified. In this case when the source collection changes , immutable Collection do not reflect the changes
H...
JS - get image width and height from the base64 code
...();
$('#hiddenImage').remove();
alert("width:"+width+" height:"+height);
Test here:
FIDDLE
Image is not initially created hidden. it gets created, then you get width and height and then remove it. This may cause a very short visibility in large images in this case you have to wrap the image in an...
How do I determine height and scrolling position of window in jQuery?
...0x faster than jquery (and code has similar size):
Here you can perform test on your machine: https://jsperf.com/window-height-width
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Check if a string contains a substring in SQL Server 2005, using a stored procedure
...- depends on the collation's involved. You can always force it within this test if you need it one way or the other. E.g. compare select CHARINDEX('ME' collate Latin1_General_CS_AS,'Home') and select CHARINDEX('ME' collate Latin1_General_CI_AS,'Home'). (In collations, CS stands for Case Sensitive an...
Pattern to avoid nested try catch blocks?
...ap the Maybe and
// use its value.
return m;
}
Use it like so:
[Test]
public void ThrowIfNone_ThrowsTheSpecifiedException_GivenNoSuccessfulTryGet()
{
Assert.That(() =>
Maybe<double>.None
.TryGet(() => { throw new Exception(); })
.TryGet(() =...
In Vim, I'd like to go back a word. The opposite of `w`
...
use "b" to move back - just tested in vi - works fine.
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