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List comprehension rebinds names even after scope of comprehension. Is this right?
... loop control variable in Python 2 but not in Python 3. Here's Guido van Rossum (creator of Python) explaining the history behind this:
We also made another change in Python
3, to improve equivalence between list
comprehensions and generator
expressions. In Python 2, the list
comprehens...
Why is volatile needed in C?
...
volatile in C actually came into existence for the purpose of not caching the values of the variable automatically. It will tell the compiler not to cache the value of this variable. So it will generate code to take the value of the given volatile variable from the main memory ev...
Delete/Reset all entries in Core Data?
...d safe, and can certainly be done programatically at runtime.
Update for iOS5+
With the introduction of external binary storage (allowsExternalBinaryDataStorage or Store in External Record File) in iOS 5 and OS X 10.7, simply deleting files pointed by storeURLs is not enough. You'll leave the exte...
Running a cron every 30 seconds
...go down to sub-minute resolutions, you will need to find another way.
One possibility, though it's a bit of a kludge(a), is to have two jobs, one offset by 30 seconds:
# Need these to run on 30-sec boundaries, keep commands in sync.
* * * * * /path/to/executable param1 param2
* * * * * ...
How do I create my own URL protocol? (e.g. so://…) [closed]
...a.org/assignments/uri-schemes/uri-schemes.xhtml,
http://msdn.microsoft.com/en-us/library/aa767914(v=vs.85).aspx
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Remove vertical padding from horizontal ProgressBar
... (like in this answer is better solution and not depend on phone size/type/os version
– koceeng
Feb 27 '17 at 10:52
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How to ignore certain files in Git
I have a repository with a file, Hello.java . When I compile it, an additional Hello.class file is generated.
21 Answers...
Importing from builtin library when module with same name exists
...ython >= 3.5:
import importlib.util
import sys
# For illustrative purposes.
import tokenize
file_path = tokenize.__file__ # returns "/path/to/tokenize.py"
module_name = tokenize.__name__ # returns "tokenize"
spec = importlib.util.spec_from_file_location(module_name, file_path)
module = impor...
Controlling the screenshot in the iOS 7 multitasking switcher
...rying to find some information regarding the new multitasking switcher in iOS 7 and especially the screenshot that the OS takes when the app is going into hibernation.
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How do I prompt for Yes/No/Cancel input in a Linux shell script?
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The simplest and most widely available method to get user input at a shell prompt is the read command. The best way to illustrate its use is a simple demonstration:
while true; do
read -p "Do you wish to install this program?" yn
case...