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Element-wise addition of 2 lists?
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Use map with operator.add:
>>> from operator import add
>>> list( map(add, list1, list2) )
[5, 7, 9]
or zip with a list comprehension:
>>> [sum(x) for x in zip(list1, list2)]
[5, 7, 9]
Timing compariso...
How to check if a String contains another String in a case insensitive manner in Java?
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Yes, contains is case sensitive. You can use java.util.regex.Pattern with the CASE_INSENSITIVE flag for case insensitive matching:
Pattern.compile(Pattern.quote(wantedStr), Pattern.CASE_INSENSITIVE).matcher(source).find();
EDIT: If s2 contains reg...
How to log out user from web site using BASIC authentication?
Is it possible to log out user from a web site if he is using basic authentication?
22 Answers
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PHP best way to MD5 multi-dimensional array?
...tioned prior, the following will work.
md5(serialize($array));
However, it's worth noting that (ironically) json_encode performs noticeably faster:
md5(json_encode($array));
In fact, the speed increase is two-fold here as (1) json_encode alone performs faster than serialize, and (2) json_encod...
Create a nonclustered non-unique index within the CREATE TABLE statement with SQL Server
It is possible to create a primary key or unique index within a SQL Server CREATE TABLE statement. Is it possible to create a non-unique index within a CREATE TABLE statement?
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How to upload a project to Github
After checking Upload my project to github I still have no idea how to get a project uploaded to my Git Hub repository.
2...
Java time-based map/cache with expiring keys [closed]
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Yes. Google Collections, or Guava as it is named now has something called MapMaker which can do exactly that.
ConcurrentMap<Key, Graph> graphs = new MapMaker()
.concurrencyLevel(4)
.softKeys()
.weakValues()
.maximumSize(10000)
.expiration(1...
How do I sort a vector of pairs based on the second element of the pair?
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EDIT: using c++14, the best solution is very easy to write thanks to lambdas that can now have parameters of type auto. This is my current favorite solution
std::sort(v.begin(), v.end(), [](auto &left, auto &right) {
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How to determine when Fragment becomes visible in ViewPager
...follow
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edited Jun 15 '16 at 18:11
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
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How can I extract audio from video with ffmpeg?
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To extract the audio stream without re-encoding:
ffmpeg -i input-video.avi -vn -acodec copy output-audio.aac
-vn is no video.
-acodec copy says use the same audio stream that's already in there.
Read the output to see what codec it is, to set th...