Is there a way to not wait for a system() command to finish? (in c) [duplicate]

system() simply passes its argument to the shell (on Unix-like systems, usually /bin/sh). Try this: int a = system(“python -m plotter &”); Of course the value returned by system() won’t be the exit status of the python script, since it won’t have finished yet. This is likely to work only on Unix-like systems (probably including … Read more

Passing variables, creating instances, self, The mechanics and usage of classes: need explanation [closed]

class Foo (object): # ^class name #^ inherits from object bar = “Bar” #Class attribute. def __init__(self): # #^ The first variable is the class instance in methods. # # This is called “self” by convention, but could be any name you want. #^ double underscore (dunder) methods are usually special. This one # gets … Read more

JavaScript: Detect AJAX requests

Here’s some code (tested by pasting into Chrome 31.0.1650.63’s console) for catching and logging or otherwise processing ajax requests and their responses: (function() { var proxied = window.XMLHttpRequest.prototype.send; window.XMLHttpRequest.prototype.send = function() { console.log( arguments ); //Here is where you can add any code to process the request. //If you want to pass the Ajax request … Read more

How to call a batch file that is one level up from the current batch file directory?

I want to explain better what should be used with an example as the answers posted up to now work only with current working directory being the directory containing the batch file file.bat. There is a directory structure as follows: C:\ Temp Folder 1 Folder 2 Example.bat Parent.bat The current working directory is C:\Temp on executing … Read more

How to execute a function asynchronously every 60 seconds in Python?

You could try the threading.Timer class: http://docs.python.org/library/threading.html#timer-objects. import threading def f(f_stop): # do something here … if not f_stop.is_set(): # call f() again in 60 seconds threading.Timer(60, f, [f_stop]).start() f_stop = threading.Event() # start calling f now and every 60 sec thereafter f(f_stop) # stop the thread when needed #f_stop.set()

Python __call__ special method practical example

This example uses memoization, basically storing values in a table (dictionary in this case) so you can look them up later instead of recalculating them. Here we use a simple class with a __call__ method to calculate factorials (through a callable object) instead of a factorial function that contains a static variable (as that’s not … Read more