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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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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'...
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.
...
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
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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${suffix}\n" < file | sponge file
Using join:
suffix=foobar
join file file -e...
Using Python String Formatting with Lists
...le token in brackets has no meaning in Python. You usually put brackets in foo = (bar, ) to make it easier to read but foo = bar, does exactly the same thing.
– patrys
Sep 27 '11 at 12:10
...
Referring to the null object in Python
...ay to check things for "Noneness" is to use the identity operator, is:
if foo is None:
...
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Using Default Arguments in a Function
...the function declaration as follows so you can do what you want:
function foo($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...
How to use '-prune' option of 'find' in sh?
...o prune out).
Here's an example:
find . -name .snapshot -prune -o -name '*.foo' -print
This will find the "*.foo" files that aren't under ".snapshot" directories. In this example, -name .snapshot makes up the [conditions to prune], and -name '*.foo' -print is [your usual conditions] and [actions to...
How do I unset an element in an array in javascript?
How do I remove the key 'bar' from an array foo so that 'bar' won't show up in
6 Answers
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