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Disable assertions in Python
...ble assertions in Python?
There are multiple approaches that affect a single process, the environment, or a single line of code.
I demonstrate each.
For the whole process
Using the -O flag (capital O) disables all assert statements in a process.
For example:
$ python -Oc "assert False"
$ pyt...
Why not abstract fields?
Why can't Java classes have abstract fields like they can have abstract methods?
5 Answers
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C# 'is' operator performance
I have a program that requires fast performance. Within one of its inner loops, I need to test the type of an object to see whether it inherits from a certain interface.
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Java multiline string
Coming from Perl, I sure am missing the "here-document" means of creating a multi-line string in source code:
42 Answers
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How do I escape the wildcard/asterisk character in bash?
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Quoting when setting $FOO is not enough. You need to quote the variable reference as well:
me$ FOO="BAR * BAR"
me$ echo "$FOO"
BAR * BAR
share
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Simplest/Cleanest way to implement singleton in JavaScript?
What is the simplest/cleanest way to implement singleton pattern in JavaScript?
37 Answers
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lock(new object()) — Cargo cult or some crazy “language special case”?
I'm reviewing some code written by a consultant, and while dozens of red flags have already popped up, I can't wrap my head around the following snippet:
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Spring ApplicationContext - Resource leak: 'context' is never closed
In a spring MVC application, I initialize a variable in one of the service classes using the following approach:
16 Answers...
How do I strip non alphanumeric characters from a string and keep spaces?
I want to create a regex that removes all non-alphanumber characters but keeps spaces. This is to clean search input before it hits the db. Here's what I have so far:
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Windows equivalent of the 'tail' command
Is there a way to simulate the *nix tail command on the Windows command line? I have a file and I want a way to snip off the first n lines of text. For example:
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