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Most efficient way to store thousand telephone numbers
...etera, up to the count of phone numbers for which the first m bits are 1...11 - this last count is 1000(decimal). There are 2^m such counts and each count is at most 1000. If we omit the last one (because we know it is 1000 anyway), we can store all of these numbers in a contiguous block of (2^m - 1...
Is calculating an MD5 hash less CPU intensive than SHA family functions?
...ad Q6600, 2.4 GHz, using one core), I get this in 32-bit mode:
MD5 411
SHA-1 218
SHA-256 118
SHA-512 46
and this in 64-bit mode:
MD5 407
SHA-1 312
SHA-256 148
SHA-512 189
Figures are in megabytes per second, for a "long" message (this is what you get for messages l...
filter items in a python dictionary where keys contain a specific string
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Jonathon ReinhartJonathon Reinhart
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How to delete items from a dictionary while iterating over it?
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answered Mar 21 '11 at 23:47
BlairBlair
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How to swap keys and values in a hash
... in your hash.
– Tilo
Apr 14 '15 at 11:19
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Best way to merge two maps and sum the values of same key?
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edited Apr 11 '14 at 2:39
Erik Kaplun
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Is there a format code shortcut for Visual Studio?
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Community♦
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answered Feb 9 '11 at 6:59
Jason WilliamsJason Williams
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How to overcome TypeError: unhashable type: 'list'
...d[key].append(value)
else:
d[key] = [value]
print d
# {'AAA': ['111', '112'], 'AAC': ['123'], 'AAB': ['111']}
Note that if you are using Python 3.x, you'll have to make a minor adjustment to get it work properly. If you open the file with rb, you'll need to use line = line.split(b'x') (...
Statistics: combinations in Python
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answered Jun 11 '10 at 18:29
Jouni K. SeppänenJouni K. Seppänen
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How to implode array with key and value without foreach in PHP
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