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How to invoke a Linux shell command from Java
I am trying to execute some Linux commands from Java using redirection (>&) and pipes (|). How can Java invoke csh or bash commands?
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List comprehension rebinds names even after scope of comprehension. Is this right?
...change in Python
3, to improve equivalence between list
comprehensions and generator
expressions. In Python 2, the list
comprehension "leaks" the loop control
variable into the surrounding scope:
x = 'before'
a = [x for x in 1, 2, 3]
print x # this prints '3', not 'before'
This was ...
What is the purpose of the single underscore “_” variable in Python?
...nt) in an interactive
interpreter session. This precedent was set by the standard CPython
interpreter, and other interpreters have followed suit
As a general purpose "throwaway" variable name to indicate that part
of a function result is being deliberately ignored (Conceptually, it is being discarde...
LD_LIBRARY_PATH vs LIBRARY_PATH
I'm building a simple C++ program and I want to temporarily substitute a system supplied shared library with a more recent version of it, for development and testing.
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Suppressing “warning CS4014: Because this call is not awaited, execution of the current method conti
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This is a handy little language feature that I just cannot remember. It's like there's a _ = ... in my brain.
– Marc L.
Mar 14 '18 at 14:29
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What does a colon following a C++ constructor name do? [duplicate]
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This is an initialization list, and is part of the constructor's implementation.
The constructor's signature is:
MyClass();
This means that the constructor can be called with no parameters. This makes it a default constructor, i.e., one which will be ca...
Squash my last X commits together using Git
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Use git rebase -i <after-this-commit> and replace "pick" on the second and subsequent commits with "squash" or "fixup", as described in the manual.
In this example, <after-this-commit> is either the SHA1 hash or the relative location from the HEAD of the c...
Performance of FOR vs FOREACH in PHP
First of all, I understand in 90% of applications the performance difference is completely irrelevant, but I just need to know which is the faster construct. That and...
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Java system properties and environment variables
What's the difference between system properties System.getProperties() and environment variables System.getenv() in a JVM?
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Set mouse focus and move cursor to end of input using jQuery
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Looks like clearing the value after focusing and then resetting works.
input.focus();
var tmpStr = input.val();
input.val('');
input.val(tmpStr);
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