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How to count the number of set bits in a 32-bit integer?
...ays addition'.
The 'best' algorithm really depends on which CPU you are on and what your usage pattern is.
Some CPUs have a single built-in instruction to do it and others have parallel instructions which act on bit vectors. The parallel instructions (like x86's popcnt, on CPUs where it's supported)...
How do I do base64 encoding on iOS?
I'd like to do base64 encoding and decoding, but I could not find any support from the iPhone SDK . How can I do base64 encoding and decoding with or without a library?
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How do I get the path and name of the file that is currently executing?
...vide an example? I've answered similar question using inspect.getabsfile() and it worked for all cases that I've tried.
– jfs
Apr 5 '14 at 17:04
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How to secure MongoDB with username and password
... for the user name & password. I tried the tutorial from the MongoDB site and did following:
15 Answers
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Lost connection to MySQL server at 'reading initial communication packet', system error: 0
...ests that it might be a firewall problem:
I have just had this problem and found it was my firewall. I use PCTools Firewall Plus and it wasn't allowing full access to MySQL. Once I changed that it was fine. Hope that helps.
Could that be it?
Also, someone here suggests that it might be becaus...
How can I resize an image using Java?
I need to resize PNG, JPEG and GIF files. How can I do this using Java?
17 Answers
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How do I add a library project to Android Studio?
How do I add a library project (such as Sherlock ABS) to Android Studio ?
30 Answers
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The forked VM terminated without saying properly goodbye. VM crash or System.exit called
Please help me to solve this issue. I do not exactly understand what the error in the log means.
48 Answers
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Does Python have an ordered set?
...s referred to from the Python 2 Documentation. This runs on Py2.6 or later and 3.0 or later without any modifications. The interface is almost exactly the same as a normal set, except that initialisation should be done with a list.
OrderedSet([1, 2, 3])
This is a MutableSet, so the signature for ...
Call apply-like function on each row of dataframe with multiple arguments from each row
...mns. For each row in the dataframe, I want to call a function on the row, and the input of the function is using multiple columns from that row. For example, let's say I have this data and this testFunc which accepts two args:
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