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Regular expression to find URLs within a string
Does anyone know of a regular expression I could use to find URLs within a string? I've found a lot of regular expressions on Google for determining if an entire string is a URL but I need to be able to search an entire string for URLs. For example, I would like to be able to find www.google.com ...
Does const mean thread-safe in C++11?
... to say on thread-safety:
[1.10/4]
Two expression evaluations conflict if one of them modifies a memory location (1.7) and the other one accesses or modifies the same memory location.
[1.10/21]
The execution of a program contains a data race if it contains two conflicting actions in different threa...
How does one generate a random number in Apple's Swift language?
... generator. Is the best practice to copy and paste this implementation in one's own program? Or is there a library that does this that we can use now?
...
What is NSLayoutConstraint “UIView-Encapsulated-Layout-Height” and how should I go about forcing it
...e sure to return the right value and your own constraint and the generated one should be the same. The lower priority for your own constraint is only needed temporarily to prevent conflicts while collapse/expand animations are in flight.
...
Syntax for creating a two-dimensional array
...ut int array[][] = new int[3][]; VS int array[][] = new int[][3]; ?? which one is legal as I have read both version somewhere.
– roottraveller
Jun 13 '17 at 9:40
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Instance variables vs. class variables in Python
I have Python classes, of which I need only one instance at runtime, so it would be sufficient to have the attributes only once per class and not per instance. If there would be more than one instance (which won't happen), all instance should have the same configuration. I wonder which of the follow...
How to randomize (or permute) a dataframe rowwise and columnwise?
...meter replace=FALSE (the default) to sample(...) ensures that sampling is done without replacement which accomplishes a row wise shuffle.
Shuffle column-wise:
> df3 <- df1[,sample(ncol(df1))]
> df3
c a b
1 0 1 1
2 0 1 0
3 0 0 1
4 0 0 0
...
How to set java_home on Windows 7?
...ent Variables in 'System' in the control panel and made two new variables, one for user variables and one for system variables. Both were named JAVA_HOME and both pointing to
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How to delete multiple buffers in Vim?
...L files with :bd *.xml . However, Vim does not allow this (E93: More than one match...).
8 Answers
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The smallest difference between 2 Angles
...
although one might want to do a % 360, e.g. if I had the angle 0 and the target angle 721, the correct answer would be 1, the answer given by the above would be 361
– Tom J Nowell
Oct 25 '11 at 1...