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Test if executable exists in Python?
... set. I also find it useful to add this to the top of the function: import sys; if sys.platform == "win32" and not program.endswith(".exe"): program += ".exe". This way under Windows you can refer to either "calc" or "calc.exe", just like you could in a cmd window.
– Kevin Ivar...
Most concise way to convert a Set to a List
... should be and are zero based which is why this is so strange to me. After converting my set to a list I can't perform any iterative operation on it foreach, sort, etc. I get a NullPointerException, however when I expect my list none of the elements are null, and the only weird I notice is that the ...
Reading a binary file with python
...
See this answer if you need to convert an unpacked char[] to a string.
– PeterM
May 20 '16 at 14:57
...
Java Array Sort descending?
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Convert your primitives to their respective objects. Integer for int, Double for double, Boolean for boolean, etc.
– Ishmael
Aug 21 '13 at 15:32
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Android Reading from an Input stream efficiently
...) {
total.append(line).append('\n');
}
You can now use total without converting it to String, but if you need the result as a String, simply add:
String result = total.toString();
I'll try to explain it better...
a += b (or a = a + b), where a and b are Strings, copies the contents of both...
How can I exclude directories from grep -R?
... search in all my linux directories except proc directory, boot directory, sys directory and root directory :
grep -rli --exclude-dir={proc,boot,root,sys} hello /
Note : The example above needs to be root
Note 2 (according to @skplunkerin) : do not add spaces after the commas in {dir1,dir2,dir3}...
How do I use the lines of a file as arguments of a command?
...ted_list() {
## Works with either Python 2.x or 3.x
python -c '
import sys, pipes, shlex
quote = pipes.quote if hasattr(pipes, "quote") else shlex.quote
print(" ".join([quote(s) for s in sys.stdin.read().split("\0")][:-1]))
'
}
eval "set -- $(quoted_list <file)"
run_your_command "$@"
...
How do I get the number of elements in a list?
...nt the built-in function len(). Should return the length of the object, an integer >= 0. Also, an object that doesn’t
define a __nonzero__() [in Python 2 or __bool__() in Python 3] method and whose __len__() method returns zero
is considered to be false in a Boolean context.
And we can al...
In Python, what happens when you import inside of a function? [duplicate]
...de or outside a function), goo.py (or other importable form) is loaded and sys.modules['goo'] is set to the module object thus built. Any future import within the same run of the program (again, whether inside or outside a function) just look up sys.modules['goo'] and bind it to barename goo in the...
Cast from VARCHAR to INT - MySQL
...r i found some times ending up with a float64 that why i will prefer using CONVERT('123456',UNSIGNED INTEGER)
– Isaac Weingarten
Jun 23 at 21:06
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