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Python extract pattern matches
... (.*) is valid")
>>> result = p.search(s)
>>> result
<_sre.SRE_Match object at 0x10555e738>
>>> result.group(1) # group(1) will return the 1st capture (stuff within the brackets).
# group(0) will returned the entire matched text.
'my_user_...
Reverse / invert a dictionary mapping
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For Python 2.7.x
inv_map = {v: k for k, v in my_map.iteritems()}
For Python 3+:
inv_map = {v: k for k, v in my_map.items()}
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JavaScript % (modulo) gives a negative result for negative numbers
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@ Shanimal: LOL! It does. An error by the HTML editor. The spec text does not.
– T.J. Crowder
Jul 25 '17 at 6:34
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Insert a line break in mailto body
...applications.
– Jem
Apr 1 '14 at 12:05
2
I did some test with an other platform, my code is worki...
HttpClient.GetAsync(…) never returns when using await/async
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answered May 21 '19 at 19:05
BondolinBondolin
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Remove last item from array
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learn by example:
let array_1 = [1,2,3,4];
let array_2 = [1,2,3,4];
let array_3 = [1,2,3,4];
array_1.splice(-1,1) // output --> [4] array_1 = [1,2,3]
array_2.slice(0,-1); // output --> [1,2,3] array_2 = [1,2,3,4]
array_3.pop(); //...
Select Last Row in the Table
...mps = true) in the Model, but can be disabled at wish so you would have an error if undefined
– Plotisateur
Oct 18 '17 at 3:59
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How to execute PHP code from the command line?
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php -r "echo 1"
-- correct
php -r 'echo 1'
-- incorrect
PHP Parse error: syntax error, unexpected ''echo' (T_ENCAPSED_AND_WHITESPACE), expecting end of file in Command line code on line 1
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Double Negation in C++
...ernel). For GCC, they're implemented as follows:
#define likely(cond) (__builtin_expect(!!(cond), 1))
#define unlikely(cond) (__builtin_expect(!!(cond), 0))
Why do they have to do this? GCC's __builtin_expect treats its parameters as long and not bool, so there needs to be some form of conver...
How can I get a precise time, for example in milliseconds in Objective-C?
...modifier to conversion since receiver is earlier than now
double timePassed_ms = [date timeIntervalSinceNow] * -1000.0;
Documentation on timeIntervalSinceNow.
There are many other ways to calculate this interval using NSDate, and I would recommend looking at the class documentation for NSDate whi...