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Best way to find the intersection of multiple sets?
... want here, but in case you ever need a generalisation of "take the sum of all these", "take the product of all these", "take the xor of all these", what you are looking for is the reduce function:
from operator import and_
from functools import reduce
print(reduce(and_, [{1,2,3},{2,3,4},{3,4,5}]))...
SVN: Is there a way to mark a file as “do not commit”?
...rtoiseSVN has a built in changelist, "ignore-on-commit", which is automatically excluded from commits. The command-line client does not have this, so you need to use multiple changelists to accomplish this same behavior (with caveats):
one for work you want to commit [work]
one for things you want...
Why was the switch statement designed to need a break?
...
Many answers seem to focus on the ability to fall through as the reason for requiring the break statement.
I believe it was simply a mistake, due largely because when C was designed there was not nearly as much experience with how these constructs would be used.
Peter ...
Why is creating a Thread said to be expensive?
... there is a fair bit of work involved:
A large block of memory has to be allocated and initialized for the thread stack.
System calls need to be made to create / register the native thread with the host OS.
Descriptors need to be created, initialized and added to JVM-internal data structures.
It...
What's the simplest way to test whether a number is a power of 2 in C++?
...
so basically (n>0 && ((n & (n-1)) == 0))
– Saurabh Goyal
Jul 10 '16 at 8:06
1
...
Failed to load JavaHL Library
...tput from the last command could look like this, for example:
/usr/lib/x86_64-linux-gnu/jni/libsvnjavahl-1.so
This gives you the path, so you can add the following to your eclipse.ini:
-Djava.library.path=/usr/lib/x86_64-linux-gnu/jni/
...
Making an array of integers in iOS
...rays are such a hassle for anything but trivial, one-off use that it's actually less trouble to wrap any arrays you plan on keeping around as NSArrays of NSNumber.
– Chuck
Jul 27 '10 at 1:58
...
New lines inside paragraph in README.md
... to ensure that each line ends with two spaces. So, change
a
b
c
into
a__
b__
c
(where _ is a blank space).
Or, you can add explicit <br /> tags.
a <br />
b <br />
c
share
|
...
Multiline bash commands in makefile
...colon:
foo:
for i in `find`; \
do \
all="$$all $$i"; \
done; \
gcc $$all
But if you just want to take the whole list returned by the find invocation and pass it to gcc, you actually don't necessarily need a multiline command:
foo:
...
jQuery $(document).ready and UpdatePanels?
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$(document).ready(function() {
// bind your jQuery events here initially
});
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_endRequest(function() {
// re-bind your jQuery events here
});
The PageRequestManager is a javascript object which is automatically available i...