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Finding all possible combinations of numbers to reach a given sum

How would you go about testing all possible combinations of additions from a given set N of numbers so they add up to a given final number? ...
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Checking if a string can be converted to float in Python

...False print(isfloat("12.34.56")) False Two dots not allowed. print(isfloat("#56")) False print(isfloat("56%")) False print(isfloat("0E0")) True print(isfloat("x86E0")) False print(isfloat("86-5")) ...
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Should import statements always be at the top of a module?

...t that's only paid once. Putting the imports within a function will cause calls to that function to take longer. So if you care about efficiency, put the imports at the top. Only move them into a function if your profiling shows that would help (you did profile to see where best to improve perform...
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Resize fields in Django Admin

...awy to this in a form? I did not find a way to set the attrs attribute for all Textareas. – Julian Sep 5 '16 at 11:33 1 ...
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Javascript/DOM: How to remove all events of a DOM object?

Just question: Is there any way to completely remove all events of an object, e.g. a div? 12 Answers ...
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How to disable and re-enable console logging in Python?

... If you wanted to only filter message below a certain log level (say, all INFO messages), you could change the second line to something like logger.setLevel(logging.WARNING) – Hartley Brody Jan 5 '18 at 16:48 ...
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Unable to find a locale path to store translations for file __init__.py

... Actually you can configure where the locale folder is. In your settings.py add: LOCALE_PATHS = ( PROJECT_ROOT + '/website/locale', ) Then create a folder for each of the languages you want to translate: mkdir -p website/...
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Bash continuation lines

... like a single string which crosses lines, while indenting but not getting all those spaces, one approach you can try is to ditch the continuation line and use variables: $ a="continuation" $ b="lines" $ echo $a$b continuationlines This will allow you to have cleanly indented code at the expense ...
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How to list all properties of a PowerShell object

...nstructions that can affect either the table or list formats. These are usually meant to limit the display of reams of properties down to just the essential properties. However there are times when you really want to see everything. In those cases Format-List * will show all the properties. Note tha...
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How do I find where an exception was thrown in C++?

I have a program that throws an uncaught exception somewhere. All I get is a report of an exception being thrown, and no information as to where it was thrown. It seems illogical for a program compiled to contain debug symbols not to notify me of where in my code an exception was generated. ...