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Vim: What's the difference between let and set?
...40
:let &tw=40
But, for example, assigning 50 to the global variable foo (:let g:foo=50) cannot be achieved with a :set command (because g:foo is a variable and not an option).
Some options are boolean like. When setting these, no value is needed (as in :set noic and the opposite :set ic).
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How to create Gmail filter searching for text only at start of subject line?
...)
Do this: Skip Inbox
And then I sent a message with the subject
[test] foo
And the message was archived! So it seems all that is necessary is to create a filter for the subject prefix you wish to handle.
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Why does this assert throw a format exception when comparing structures?
...d that's what's failing. Ouch.
Indeed, we can prove this really easily by fooling the formatting to use our parameters for the expected and actual parts:
var x = "{0}";
var y = "{1}";
Assert.AreEqual<object>(x, y, "What a surprise!", "foo", "bar");
The result is:
Assert.AreEqual failed. E...
How do I print the type of a variable in Rust?
...![1, 2, 4]); // prints "std::vec::Vec<i32>"
print_type_of(&"foo"); // prints "&str"
}
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what is the difference between ?:, ?! and ?= in regex?
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Try matching foobar against these:
/foo(?=b)(.*)/
/foo(?!b)(.*)/
The first regex will match and will return "bar" as first submatch — (?=b) matches the 'b', but does not consume it, leaving it for the following parentheses.
The seco...
Make multiple-select to adjust its height to fit options without scroll bar
...tiple='multiple' id='select' style='overflow:hidden'>
<option value='foo'>foo</option>
<option value='bar'>bar</option>
<option value='abc'>abc</option>
<option value='def'>def</option>
<option value='xyz'>xyz</option>
</select>
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One-liner to recursively list directories in Ruby?
...) # for directories
Dir.glob("**/*") # for all files
Instead of Dir.glob(foo) you can also write Dir[foo] (however Dir.glob can also take a block, in which case it will yield each path instead of creating an array).
Ruby Glob Docs
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Getting the caller function name inside another function in Python? [duplicate]
...s._getframe(1).f_code.co_name like in the example below:
>>> def foo():
... global x
... x = sys._getframe(1)
...
>>> def y(): foo()
...
>>> y()
>>> x.f_code.co_name
'y'
>>>
Important note: as it's obvious from the _getframe method name (hey, it st...
How to get random value out of an array?
...sults[] = $array[$key];
}
return $results;
}
Usage:
$items = ['foo', 'bar', 'baz', 'lorem'=>'ipsum'];
array_random($items); // 'bar'
array_random($items, 2); // ['foo', 'ipsum']
A few notes:
$amount has to be less than or equal to count($array).
array_rand() doesn't shuffle keys ...
What is array to pointer decay?
...array to something else, again it "decays into a pointer" (sic); ...
void foo(int arr[]);
Function foo expects the value of an array. But, in C, arrays have no value! So foo gets instead the address of the first element of the array.
int arr[5];
int *ip = &(arr[1]);
if (arr == ip) { /* somet...