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Use of “global” keyword in Python
...l variables is seldom considered a good solution.
def bob():
me = "locally defined" # Defined only in local context
print(me)
bob()
print(me) # Asking for a global variable
The above will give you:
locally defined
Traceback (most recent call last):
File "file.py", line 9, in &l...
What does the constant 0.0039215689 represent?
...modern compilers may be smart enough to do this optimization, they are not allowed to do it unless you explicitly tell them to via a compiler flag.
Related: Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
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Artificially create a connection timeout error
...occurs when I receive a connection timeout. These errors are very rare (usually when my connection gets dropped by our internal network). How can I generate this kind of effect artificially so I can test our software?
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How do I access the command history from IDLE?
...ommand from the top menu in IDLE: "Shell -> Previous History"
Incidentally, why don't you try a better (less ugly, for starters) shell like bpython or ipython?
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In C# check that filename is *possibly* valid (not that it exists) [duplicate]
... not valid
} else {
// file name is valid... May check for existence by calling fi.Exists.
}
For creating a FileInfo instance the file does not need to exist.
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Java variable number or arguments for a method
Is it possible to declare a method that will allow a variable number of parameters ?
6 Answers
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SSH configuration: override the default username [closed]
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Create a file called config inside ~/.ssh. Inside the file you can add:
Host *
User buck
Or add
Host example
HostName example.net
User buck
The second example will set a username and is hostname specific, while the first e...
How does bash tab completion work?
...ary, as already mentioned by fixje, manages the command line editing, and calls back to bash when tab is pressed, to enable completion. Bash then gives (see next point) a list of possible completions, and readline inserts as much characters as are identified unambiguously by the characters already t...
Why “decimal” is not a valid attribute parameter type?
It is really unbelievable but real. This code will not work:
3 Answers
3
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Why doesn't Git ignore my specified file?
...es this since the file is already part of the repository.
In order to actually ignore the file, you have to untrack it and remove it from the repository. You can do that by using git rm --cached sites/default/settings.php. This removes the file from the repository without physically deleting the fi...