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C# code to validate email address
...ValidateSomeEmails
{
static void Main(string[] args)
{
var foo = new EmailAddressAttribute();
bool bar;
bar = foo.IsValid("someone@somewhere.com"); //true
bar = foo.IsValid("someone@somewhere.co.uk"); //true
bar = foo.IsValid("someone+tag...
Stash only one file out of multiple files that have changed with Git?
...ff:
test_expect_success 'stash with multiple pathspec arguments' '
>foo &&
>bar &&
>extra &&
git add foo bar extra &&
git stash push -- foo bar &&
test_path_is_missing bar &&
test_path_is_missing foo &&...
throwing exceptions out of a destructor
...tructor. The output is performed by the guard object's
destructor unless foo() throws (in which case the number of uncaught
exceptions in the destructor is greater than what the constructor
observed)
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|
...
Can I call an overloaded constructor from another constructor of the same class in C#?
...r in C# is immediately after ":" after the constructor.
for example
class foo
{
public foo(){}
public foo(string s ) { }
public foo (string s1, string s2) : this(s1) {....}
}
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|
...
Elegant way to combine multiple collections of elements?
...s, each containing objects of the same type (for example, List<int> foo and List<int> bar ). If these collections were themselves in a collection (e.g., of type List<List<int>> , I could use SelectMany to combine them all into one collection.
...
How do you read from stdin?
...eed to read from sys.stdin, for example, if you pipe data to stdin:
$ echo foo | python -c "import sys; print(sys.stdin.read())"
foo
We can see that sys.stdin is in default text mode:
>>> import sys
>>> sys.stdin
<_io.TextIOWrapper name='<stdin>' mode='r' encoding='UTF-8'...
Escape a string for a sed replace pattern
...ed allow you to use any character, so long as it fits the pattern: $ echo 'foo/bar' | sed s_/_:_ # foo:bar
– PeterJCLaw
Jun 18 '11 at 13:27
2
...
In Bash, how do I add a string after each line in a file?
...
Pure POSIX shell and sponge:
suffix=foobar
while read l ; do printf '%s\n' "$l" "${suffix}" ; done < file |
sponge file
xargs and printf:
suffix=foobar
xargs -L 1 printf "%s${suffix}\n" < file | sponge file
Using join:
suffix=foobar
join file file -e...
Using Python String Formatting with Lists
...le token in brackets has no meaning in Python. You usually put brackets in foo = (bar, ) to make it easier to read but foo = bar, does exactly the same thing.
– patrys
Sep 27 '11 at 12:10
...
Using Default Arguments in a Function
...the function declaration as follows so you can do what you want:
function foo($blah, $x = null, $y = null) {
if (null === $x) {
$x = "some value";
}
if (null === $y) {
$y = "some other value";
}
code here!
}
This way, you can make a call like foo('blah', nul...