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string.ToLower() and string.ToLowerInvariant()
...on the current culture, ToLower might produce a culture specific lowercase letter, that you aren't expecting. Such as producing ınfo without the dot on the i instead of info and thus mucking up string comparisons. For that reason, ToLowerInvariant should be used on any non-language-specific data....
RegEx to make sure that the string contains at least one lower case char, upper case char, digit and
...[a-z]) // use positive look ahead to see if at least one lower case letter exists
(?=.*[A-Z]) // use positive look ahead to see if at least one upper case letter exists
(?=.*\d) // use positive look ahead to see if at least one digit exists
(?=.*\W]) // use positive lo...
How to break out of a loop from inside a switch?
...r.
Otherwise, stop looping forever.
End.
Code
while True:
choice = raw_input('What do you want? ')
if choice == 'restart':
continue
else:
break
print 'Break!'
Versus:
Initialize the user's choice.
Loop while the user's choice is the word 'restart'.
Ask the user...
What are all codecs and formats supported by FFmpeg?
...the results
There is a key near the top of the output that describes each letter that precedes the name of the format, encoder, decoder, or codec:
$ ffmpeg -encoders
[…]
Encoders:
V..... = Video
A..... = Audio
S..... = Subtitle
.F.... = Frame-level multithreading
..S... = Slice-level multi...
Sort array of objects by single key with date value
...g, or numerically by number, and ensures that words beginning with Capital letters don't sort above words starting with a lower case letter (e.g "apple,Early" would be displayed in that order).
function sortByKey(array, key) {
return array.sort(function(a, b) {
var x = a[key];
...
Fastest way to convert Image to Byte array
...about CPU resources, pick a format which doesn't bother compressing - just raw ARGB pixels, for example. But of course that will lead to a larger byte array.
Note that if you pick a format which does include compression, there's no point in then compressing the byte array afterwards - it's almost c...
Using global variables in a function
...
It is common to use a capital letter for global variables like MyGlobal = 5
– Vassilis
Jan 24 '18 at 11:55
3
...
std::shared_ptr of this
...g. Usually, when you are accepting new entities, you should usually accept raw pointers. Smart pointer can have their own meaning for swapping children between parents, but for general usage, you should accept raw pointers.
...
How do you reverse a string in place in JavaScript?
... in the last mañana actually consists of two symbols: U+006E LATIN SMALL LETTER N and U+0303 COMBINING TILDE).
The order in which surrogate pairs appear cannot be reversed, else the astral symbol won’t show up anymore in the ‘reversed’ string. That’s why you saw those �� marks in the ...
boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
...call chained pointers. Such a chained pointer is defined by induction as a raw or smart pointer or iterator to the actual element, to a reference wrapper of the element or to another chained pointer; that is, chained pointers are arbitrary compositions of pointer-like types ultimately dereferencing ...