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MySQL Creating tables with Foreign Keys giving errno: 150
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239
I had the same problem with ALTER TABLE ADD FOREIGN KEY.
After an hour, I found that these con...
Making git auto-commit
...ommand commits file.txt as soon as it is saved:
inotifywait -q -m -e CLOSE_WRITE --format="git commit -m 'autocommit on change' %w" file.txt | sh
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SecItemAdd and SecItemCopyMatching returns error code -34018 (errSecMissingEntitlement)
...evice from Xcode I would try to access the keychain but fail due to error -34018. This doesn't match any of the documented keychain error codes and can't be consistently reproduced. (happens maybe 30% of the time, and it's not clear to me why it happens). What makes debugging this problem very diffi...
编译器内部的秘密--微软的编译器是如何解析Try/Catch/Throw的 - C/C++ - 清...
...建相关的参数。函数_CxxThrowException抛出的异常码是0xE06D7363。除了异常码，RaiseException还需要另外三个参数。一个异常标识、抛出的对象的数目和抛出的对象的数组的首地址。其代码示例如下：
__declspec(noreturn) void __stdcall __CxxThr...
Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
... and boolean False are still properly returned for comparisons.
In Python 3.x True and False are keywords and will always be equal to 1 and 0.
Under normal circumstances in Python 2, and always in Python 3:
False object is of type bool which is a subclass of int:
object
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bool
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TypeScript Objects as Dictionary types as in C#
I have some JavaScript code that uses objects as dictionaries; for example a 'person' object will hold a some personal details keyed off the email address.
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enum - getting value of enum on string conversion
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How do I find the authoritative name-server for a domain name?
...nslookup
> set querytype=soa
> stackoverflow.com
Server: 217.30.180.230
Address: 217.30.180.230#53
Non-authoritative answer:
stackoverflow.com
origin = ns51.domaincontrol.com # ("primary name server" on Windows)
mail addr = dns.jomax.net # ("responsible ma...
Stop pip from failing on single package when installing with requirements.txt
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238
Running each line with pip install may be a workaround.
cat requirements.txt | xargs -n 1 pip ...