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How can I iterate over files in a given directory?
...e rules used by the Unix shell, although results are returned in arbitrary order. No tilde expansion is done, but *, ?, and character ranges expressed with [] will be correctly matched.
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How to output only captured groups with sed?
... groups and their back references. The back references are numbered in the order the groups appear, but they can be used in any order and can be repeated:
echo "foobarbaz" | sed -r 's/^foo(.*)b(.)z$/\2 \1 \2/'
outputs "a bar a".
If you have GNU grep (it may also work in BSD, including OS X):
ec...
Delete specific line number(s) from a text file using sed?
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On my system, when processing large files, sed appears an order of magnitude slower than a simple combination of head and tail: here's an example of the faster way (without in-place mode): delete-line() { local filename="$1"; local lineNum="$2"; head -n $((lineNum-1)) "$filename"; t...
What is the yield keyword used for in C#?
...ithout creating temp collections.
It helps to do stateful iteration.
In order to explain above two points more demonstratively, I have created a simple video you can watch it here
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Trying to fire the onload event on script tag
I'm trying to load a set of scripts in order, but the onload event isn't firing for me.
1 Answer
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AWS MySQL RDS vs AWS DynamoDB [closed]
... for a fair while now and I'm comfortable with its structure & SQL Queries etc.
4 Answers
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Find location of a removable SD card
...d path by following the answers below this (scanning /proc/mounts, /system/etc/vold.fstab, etc...).
– Learn OpenGL ES
Feb 17 '13 at 15:29
8
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Regular expression to stop at first match
...n regex engines which implement the Perl 5 extensions (Java, Ruby, Python, etc) but not in "traditional" regex engines (including JavaScript, Awk, sed, grep without -P, etc).
– tripleee
Jul 8 at 17:52
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Index on multiple columns in Ruby on Rails
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The order does matter in indexing.
Put the most selective field first, i.e. the field that narrows down the number of rows fastest.
The index will only be used insofar as you use its columns in sequence starting at the beginnin...
SetUnhandledExceptionFilter and the C/C++ Runtime Library - C/C++ - 清...
... in time (JIT) debugger if such a debugger is installed on the system.
In order to test the code, we will simulate a null pointer invalid access like this:
int main()
{
::SetUnhandledExceptionFilter(OurCrashHandler);
std::cout << "Normal null pointer crash" << std::endl;
char...