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How to execute an external program from within Node.js?
...lt of the child process. Example... if the process returns an exit code 0, and I want to call a different method, I seem to run into a plethora of errors.
– continuousqa
Mar 20 '15 at 23:59
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adding directory to sys.path /PYTHONPATH
...documented as normally coming after the working directory but before the standard interpreter-supplied paths. sys.path.append() appends to the existing path. See here and here. If you want a particular directory to come first, simply insert it at the head of sys.path:
import sys
sys.path.insert(...
How can I remove specific rules from iptables?
I am hosting special HTTP and HTTPS services on the ports 8006 and 8007 respectively. I use iptables to "activate" the server; i.e. to route the incoming HTTP and HTTPS ports:
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smart pointers (boost) explained
...h is most suitable for RAII purposes where the smart pointer is kept local and is just created so it frees an object after it goes out of scope.
Share of ownership can be implemented by having a copy constructor. This naturally copies a smart pointer and both the copy and the original will referen...
Does the default constructor initialize built-in types?
...The behavior of () initializer is different in some respects between C++98 and C++03, but not in this case. For the above class C it will be the same: () initializer performs zero initialization of C::x.
Another example of initialization that is performed without involving constructor is, of course...
How to hide a in a menu with CSS?
...: none. FF won't do it (technically invalid HTML, per the spec) but Chrome and IE will and it will hide the option.
EDIT: Oh yeah, I already implemented this in jQuery:
jQuery.fn.toggleOption = function( show ) {
jQuery( this ).toggle( show );
if( show ) {
if( jQuery( this ).parent...
How do I check the operating system in Python?
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Thanks. What's the difference between linux and linux2 ?
– Tharindu Rusira
Sep 5 '13 at 2:03
1
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Force add despite the .gitignore file
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Well, I tested it to make sure it really works and it does. Can you describe your environemnt (OS, git version ...)? This is what I've basically done: echo "/foo" >> .gitignore; echo "bar" > foo; git add foo # should throw an error; git add -p foo # works (cannot...
How can I make a Python script standalone executable to run without ANY dependency?
I'm building a Python application and don't want to force my clients to install Python and modules.
19 Answers
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How to concatenate string variables in Bash
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It's specifically and only a plus-equals operator. That is, unlike Javascript, in Bash, echo $A+$B prints "X Y+Z"
– phpguru
Feb 13 '17 at 19:04
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