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How to merge dictionaries of dictionaries?
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147
this is actually quite tricky - particularly if you want a useful error message when things ar...
I want to remove double quotes from a String
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15 Answers
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Converting file size in bytes to human-readable string
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19 Answers
19
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Closing multiple issues in Github with a commit message
I know you can close issues by putting closes #1 or fixes #1 in the commit message. What is the best way to close multiple issues in the same commit message?
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How do I check the difference, in seconds, between two dates?
...es, use total_seconds like this:
import datetime as dt
a = dt.datetime(2013,12,30,23,59,59)
b = dt.datetime(2013,12,31,23,59,59)
(b-a).total_seconds()
86400.0
#note that seconds doesn't give you what you want:
(b-a).seconds
0
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Is a Java hashmap search really O(1)?
I've seen some interesting claims on SO re Java hashmaps and their O(1) lookup time. Can someone explain why this is so? Unless these hashmaps are vastly different from any of the hashing algorithms I was bought up on, there must always exist a dataset that contains collisions.
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What does string::npos mean in this code?
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12 Answers
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How to remove single character from a String
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231
You can also use the StringBuilder class which is mutable.
StringBuilder sb = new StringBuilder...