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Are there any standard exit status codes in Linux?
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8 bits of the return code and 8 bits of the number of the killing signal are mixed into a single value on the return from wait(2) & co..
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#includ...
what is the right way to treat Python argparse.Namespace() as a dictionary?
...a Namespace object, with a method that expects a dictionary or mapping-like object (see collections.Mapping ), what is the right way to do it?
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Is there a generator version of `string.split()` in Python?
..."programmer's", 'RegEx', 'test']
edit: I have just confirmed that this takes constant memory in python 3.2.1, assuming my testing methodology was correct. I created a string of very large size (1GB or so), then iterated through the iterable with a for loop (NOT a list comprehension, which would ha...
Select multiple columns in data.table by their numeric indices
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For versions of data.table >= 1.9.8, the following all just work:
library(data.table)
dt <- data.table(a = 1, b = 2, c = 3)
# select single column by index
dt[, 2]
# b
# 1: 2
# select multiple columns by index
dt[, 2:3]
# b c
# 1: 2 3
# select single column by name
dt[, "a"]...
How can I play sound in Java?
I want to be able to play sound files in my program. Where should I look?
10 Answers
1...
What are the minimum margins most printers can handle?
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This is only a safe bet on inkjets made for photo printing. Laser printers usually have a much larger margin. However, the question states that they're producing graphics, so optimizing for inkjets might be OK.
– Kevin Vermeer
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Passing arrays as parameters in bash
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You can pass multiple arrays as arguments using something like this:
takes_ary_as_arg()
{
declare -a argAry1=("${!1}")
echo "${argAry1[@]}"
declare -a argAry2=("${!2}")
echo "${argAry2[@]}"
}
try_with_local_arys()
{
# array variables could have local scope
lo...
Exact time measurement for performance testing [duplicate]
...most exact way of seeing how long something, for example a method call, took in code?
7 Answers
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Tri-state Check box in HTML?
There is no way to have a tri-state check button (yes, no, null) in HTML, right?
16 Answers
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Case insensitive regular expression without re.compile?
... edited Jun 26 '16 at 11:26
Mark Amery
98.8k4848 gold badges336336 silver badges379379 bronze badges
answered Feb 1 '09 at 14:01
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