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How can I multiply and divide using only bit shifting and adding?
How can I multiply and divide using only bit shifting and adding?
14 Answers
14
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How do you run a crontab in Cygwin on Windows?
...are .exe files, so you can run them with the standard Windows Scheduler, but others don't have an .exe extension so can't be run from DOS (it seems like).
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How can I convert an RGB image into grayscale in Python?
I'm trying to use matplotlib to read in an RGB image and convert it to grayscale.
12 Answers
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Can someone explain in simple terms to me what a directed acyclic graph is?
...e terms to me what a directed acyclic graph is? I have looked on Wikipedia but it doesn't really make me see its use in programming.
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What does the caret (^) character mean?
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HEAD^ means the first parent of the tip of the current branch.
Remember that git commits can have more than one parent. HEAD^ is short for HEAD^1, and you can also address HEAD^2 and so on as appropriate.
You can get to parents of any commit, not just HEAD. You can also move ba...
Circular (or cyclic) imports in Python
...retty thoroughly.
Imports are pretty straightforward really. Just remember the following:
'import' and 'from xxx import yyy' are executable statements. They execute
when the running program reaches that line.
If a module is not in sys.modules, then an import creates the new module
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Decimal number regular expression, where digit after decimal is optional
I need a regular expression that validates a number, but doesn't require a digit after the decimal.
ie.
15 Answers
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How is null + true a string?
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Bizarre as this may seem, it's simply following the rules from the C# language spec.
From section 7.3.4:
An operation of the form x op y, where op is an overloadable binary operator, x is an expression of type X, and y i...
How do I expand a tuple into variadic template function's arguments?
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Here's my code if anyone is interested
Basically at compile time the compiler will recursively unroll all arguments in various inclusive function calls <N> -> calls <N-1> -> calls ... -> calls <0> which is the last one and the compiler w...
How do I remove diacritics (accents) from a string in .NET?
I'm trying to convert some strings that are in French Canadian and basically, I'd like to be able to take out the French accent marks in the letters while keeping the letter. (E.g. convert é to e , so crème brûlée would become creme brulee )
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