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How to use mod operator in bash?
... calculate it as -2. You can test it with simple echo $((-12 % 10)) (-2) and compare it with python3 python3 -c "print(-12 % 10)" (8).
– Lirt
Jan 28 '19 at 22:39
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MySQL Fire Trigger for both Insert and Update
Is it possible to fire a mysql trigger for both the insert and update events of a table?
3 Answers
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Getting the name of a variable as a string
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This glosses over all kinds of problems and caveats and gives the misleading impression that variable name inspection is something people can expect to "just work". For example, if you try to use varname.nameof as the retrieve_name function in the question, you get...
UIGestureRecognizer on UIImageView
I have a UIImageView , which I want to be able to resize and rotate etc.
8 Answers
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How to enable cross-origin resource sharing (CORS) in the express.js framework on node.js
...l providing static files from a public directory. I'm using the express.js and am not really sure how to allow cross-domain scripting ( Access-Control-Allow-Origin: * ).
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What is a good Hash Function?
What is a good Hash function? I saw a lot of hash function and applications in my data structures courses in college, but I mostly got that it's pretty hard to make a good hash function. As a rule of thumb to avoid collisions my professor said that:
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Concurrent vs serial queues in GCD
I'm struggling to fully understand the concurrent and serial queues in GCD. I have some issues and hoping someone can answer me clearly and at the point.
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Constructor initialization-list evaluation order
... The reason for which they are constructed in the member declaration order and not in the order in the constructor is that one may have several constructors, but there is only one destructor. And the destructor destroy the members in the reserse order of construction.
– AProgr...
Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
...ce a NumPy nxn array. I want to extract an arbitrary selection of m rows and columns of that array (i.e. without any pattern in the numbers of rows/columns), making it a new, mxm array. For this example let us say the array is 4x4 and I want to extract a 2x2 array from it.
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Python: Ignore 'Incorrect padding' error when base64 decoding
...to normalise the data. Remove anything that's not a letter, digit / or +, and then add the padding.
– Martijn Pieters♦
Nov 20 '18 at 8:25
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