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Practical example where Tuple can be used in .Net 4.0?
...ToList()
{
// code converts grid to enumeration every possible set of 4 per rules
// code omitted
}
}
Now I can solve the whole problem with:
class Program
{
static void Main(string[] args)
{
int product = Grid.ToList().Max(t => t.Item1 * t.Item2 * t.Ite...
How do you do a simple “chmod +x” from within python?
... current permissions, use | to or the bits together, and use os.chmod() to set the updated permissions.
Example:
import os
import stat
st = os.stat('somefile')
os.chmod('somefile', st.st_mode | stat.S_IEXEC)
share
...
Getting GDB to save a list of breakpoints
...in a debugging session, it is necessary to restart GDB after building up a set of breakpoints for testing.
11 Answers
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How do you create nested dict in Python?
....
High performance: "if key not in dict" is very expensive when the data set is large.
Low maintenance: make the code more readable and can be easily extended.
from collections import defaultdict
target_dict = defaultdict(dict)
target_dict[key1][key2] = val
...
How to delete duplicate lines in a file without sorting it in Unix?
...icate, consecutive lines from a file (emulates "uniq").
# First line in a set of duplicate lines is kept, rest are deleted.
sed '$!N; /^\(.*\)\n\1$/!P; D'
# delete duplicate, nonconsecutive lines from a file. Beware not to
# overflow the buffer size of the hold space, or else use GNU sed.
sed ...
How do I measure execution time of a command on the Windows command line?
...the following script into a new batch file (e.g. timecmd.bat):
@echo off
@setlocal
set start=%time%
:: Runs your command
cmd /c %*
set end=%time%
set options="tokens=1-4 delims=:.,"
for /f %options% %%a in ("%start%") do set start_h=%%a&set /a start_m=100%%b %% 100&set /a start_s=100%%c ...
Breadth First Vs Depth First
...A more interesting question would be how they impact the cache and working set, but I think that will depend on the morphology of the tree.
– dmckee --- ex-moderator kitten
Mar 10 '16 at 1:45
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How do I tar a directory of files and folders without including the directory itself?
...
cd my_directory/ && tar -zcvf ../my_dir.tgz . && cd -
should do the job in one line. It works well for hidden files as well. "*" doesn't expand hidden files by path name expansion at least in bash. Below is my experiment:
$ mkdir my_director...
Remove all elements contained in another array
...
ECMAScript 6 sets can be used for computing the different elements of two arrays:
const myArray = new Set(['a', 'b', 'c', 'd', 'e', 'f', 'g']);
const toRemove = new Set(['b', 'c', 'g']);
const difference = new Set([...myArray].fi...
Make xargs execute the command once for each line of input
How can I make xargs execute the command exactly once for each line of input given?
It's default behavior is to chunk the lines and execute the command once, passing multiple lines to each instance.
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