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Delete an element from a dictionary
...e del statement is what you're looking for. If you have a dictionary named foo with a key called 'bar', you can delete 'bar' from foo like this:
del foo['bar']
Note that this permanently modifies the dictionary being operated on. If you want to keep the original dictionary, you'll have to create ...
#pragma once vs include guards? [duplicate]
...ged reliability problem with #pragma once. If I have two different headers foo/string.h and bar/string.h then putting a #pragma once means I'm allowed to include each of them once, but including both of them is also OK. If I use an include guard, then I will probably write something like #ifndef STR...
How do I disable the resizable property of a textarea?
...of options.
To disable a specific textarea with the name attribute set to foo (i.e., <textarea name="foo"></textarea>):
textarea[name=foo] {
resize: none;
}
Or, using an id attribute (i.e., <textarea id="foo"></textarea>):
#foo {
resize: none;
}
The W3C page lists ...
Variable interpolation in the shell
... are the only way to prevent parameter expansion. For example, "$filepath"_foo and ${filepath}_foo would both expand to /tmp/name_foo. However, '$filepath'_foo, "$"filepath_foo, and $"filepath"_foo would all avoid expansion completely. This is why export PATH=$PATH:$addpath works to add :$addpath (w...
Why can't the C# constructor infer type?
...why the constructor can't support type inference?
No. When you have
new Foo(bar)
then we could identify all types called Foo in scope regardless of generic arity, and then do overload resolution on each using a modified method type inference algorithm. We'd then have to create a 'betterness' al...
How can I declare and use Boolean variables in a shell script?
..."[]"). Instead, this is "if + command", without the "test". (Like "if grep foo file; then ...".) So, use the normal && and || operators: # t1=true; t2=true; f1=false; # if $t1 || $f1; then echo is_true ; else echo is_false; fi; (returns "true", since t1=true) # if $t1 && $f1 || $t2; ...
Return None if Dictionary key is not available
...f __getitem__(self, key):
return dict.get(self, key)
>>> foo = NoneDict([(1,"asdf"), (2,"qwerty")])
>>> foo[1]
'asdf'
>>> foo[2]
'qwerty'
>>> foo[3] is None
True
share
|...
How do I find a stored procedure containing ?
...
FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_DEFINITION LIKE '%Foo%'
AND ROUTINE_TYPE='PROCEDURE'
SELECT OBJECT_NAME(id)
FROM SYSCOMMENTS
WHERE [text] LIKE '%Foo%'
AND OBJECTPROPERTY(id, 'IsProcedure') = 1
GROUP BY OBJECT_NAME(id)
SELECT OBJECT_NAME(objec...
How do I write unit tests in PHP? [closed]
...u have the following function in a file called lib.php:
<?php
function foo($bar)
{
return $bar;
}
?>
Really simple and straight forward, the parameter you pass in, is returned. So let's look at a test for this function, we'll call the test file foo.phpt:
--TEST--
foo() function - A basic...
How do I increase the number of displayed lines of a Java stack trace dump?
...r chained exception's stack trace.
Suppose that a method catches exception Foo, wraps it in exception Bar, and throws Bar. Then Foo's stack trace will be shortened. If you for some reason want the full trace, all you need to do is take the last line before the ... in Foo's stack trace and look for i...