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How to access environment variable values?
...ou might need to see a complete list!
# using get will return `None` if a key is not present rather than raise a `KeyError`
print(os.environ.get('KEY_THAT_MIGHT_EXIST'))
# os.getenv is equivalent, and can also give a default value instead of `None`
print(os.getenv('KEY_THAT_MIGHT_EXIST', default_v...
Convert UTC date time to local date time
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@digitalbath Works on Chrome but doesn't work on Firefox.
– Ganesh Satpute
Sep 5 '17 at 13:30
3
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Including all the jars in a directory within the Java classpath
...ight quotes (")
Use *, not *.jar
Windows
java -cp "Test.jar;lib/*" my.package.MainClass
Unix
java -cp "Test.jar:lib/*" my.package.MainClass
This is similar to Windows, but uses : instead of ;. If you cannot use wildcards, bash allows the following syntax (where lib is the directory containing a...
How to RedirectToAction in ASP.NET MVC without losing request data
... edited Feb 7 '16 at 0:59
Markus Safar
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answered Aug 5 '08 at 5:43
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Explicit vs implicit SQL joins
... edited Mar 2 at 17:46
Stevoisiak
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answered Sep 4 '08 at 22:56
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Best cross-browser method to capture CTRL+S with JQuery?
My users would like to be able to hit Ctrl + S to save a form. Is there a good cross-browser way of capturing the Ctrl + S key combination and submit my form?
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Delete duplicate records in SQL Server?
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If you don't have a primary key, you can use ORDER BY (SELECT NULL) stackoverflow.com/a/4812038
– Arithmomaniac
Jul 1 '16 at 16:57
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Get attribute name value of
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djdd87djdd87
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Regular Expression to reformat a US phone number in Javascript
I'm looking to reformat (replace, not validate - there are many references for validating) a phone number for display in Javascript. Here's an example of some of the data:
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Does free(ptr) where ptr is NULL corrupt memory?
...l pointer, no action occurs.
See ISO-IEC 9899.
That being said, when looking at different codebases in the wild, you'll notice people sometimes do:
if (ptr)
free(ptr);
This is because some C runtimes (I for sure remember it was the case on PalmOS) would crash when freeing a NULL pointer.
Bu...