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Efficient string concatenation in C++
I heard a few people expressing worries about "+" operator in std::string and various workarounds to speed up concatenation. Are any of these really necessary? If so, what is the best way to concatenate strings in C++?
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Truncating floats in Python
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First, the function, for those who just want some copy-and-paste code:
def truncate(f, n):
'''Truncates/pads a float f to n decimal places without rounding'''
s = '{}'.format(f)
if 'e' in s or 'E' in s:
return '{0:.{1}f}'.format(f, n)
i, p, d = s.parti...
Can I have multiple primary keys in a single table?
Can I have multiple primary keys in a single table?
12 Answers
12
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How to add to an existing hash in Ruby
In regards to adding an key => value pair to an existing populated hash in Ruby, I'm in the process of working through Apress' Beginning Ruby and have just finished the hashes chapter.
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What's the meaning of interface{}?
I'm new to interfaces and trying to do SOAP request by github
6 Answers
6
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Reloading/refreshing Kendo Grid
How to reload or refresh a Kendo Grid using Javascript?
24 Answers
24
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What are the most-used vim commands/keypresses?
I'm a Ruby programming trying to switch from Textmate to MacVim, and I'm having trouble wading through the gargantuan lists of things you can do in VIM and all of the keypresses for them. I'm tired of hearing "You can use 'I' for inserting text, or 'a' for appending text after the character, or 'A' ...
Is there any way to kill a Thread?
Is it possible to terminate a running thread without setting/checking any flags/semaphores/etc.?
27 Answers
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Polymorphism with gson
I have a problem deserializing a json string with Gson.
I receive an array of commands. The command can be start, stop , some other type of command. Naturally I have polymorphism, and start/stop command inherit from command.
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Is it possible to assign numeric value to an enum in Java?
Is anything like this possible in Java? Can one assign custom numeric values to enum elements in Java?
5 Answers
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