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Canary release strategy vs. Blue/Green
...sting environment and are very certain that the new version will function correctly in production. Always using feature toggles is a good way to increase your confidence in a new version, since the new version functions exactly like the old until someone flips a feature toggle. Breaking your applica...
What does void mean in C, C++, and C#?
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Basically it means "nothing" or "no type"
There are 3 basic ways that void is used:
Function argument: int myFunc(void)
-- the function takes nothing.
Function return value: void myFunc(int)
-- the function returns nothing
Generic data pointer: void*...
Python - 'ascii' codec can't decode byte
I'm really confused. I tried to encode but the error said can't decode... .
7 Answers
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Post-install script with Python setuptools
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Note: The solution below only works when installing a source distribution zip or tarball, or installing in editable mode from a source tree. It will not work when installing from a binary wheel (.whl)
This solution is more transparent:
You will make a ...
How do I parse a string to a float or int?
In Python, how can I parse a numeric string like "545.2222" to its corresponding float value, 545.2222 ? Or parse the string "31" to an integer, 31 ?
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Unique combination of all elements from two (or more) vectors
I am trying to create a unique combination of all elements from two vectors of different size in R.
5 Answers
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JRuby on Rails vs. Ruby on Rails, what's difference?
...looking to try out JRuby and JRuby on Rails. I'm having trouble finding information on what's difference between JRuby on Rails and Ruby on Rails.
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What's the best way to convert a number to a string in JavaScript? [closed]
...t a number to a string (in terms of speed advantage, clarity advantage, memory advantage, etc) ?
23 Answers
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When to add what indexes in a table in Rails
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Should I add "index" to all the foreign keys like "xxx_id"?
It would be better, because it accelerates the search in sorting in this column. And Foreign keys are something searched for a lot.
Since Version 5 of rails the index will be created automaticall...
How can I check if an argument is defined when starting/calling a batch file?
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The check for whether a commandline argument has been set can be [%1]==[], but, as Dave Costa points out, "%1"=="" will also work.
I also fixed a syntax error in the usage echo to escape the greater-than and less-than signs. In additio...