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What's the difference between HEAD, working tree and index, in Git?
.... It serves two major purposes:
it tells Git which commit to take files from when you checkout, and
it tells Git where to put new commits when you commit.
When you run git checkout ref it points HEAD to the ref you’ve designated and extracts files from it. When you run git commit it create...
Python: How would you save a simple settings/config file?
... reasons to use a different format.
Write a file like so:
# python 2.x
# from ConfigParser import SafeConfigParser
# config = SafeConfigParser()
# python 3.x
from configparser import ConfigParser
config = ConfigParser()
config.read('config.ini')
config.add_section('main')
config.set('main', 'key...
Get all Attributes from a HTML element with Javascript/jQuery
...
You can get the DOM object from a jQuery object via the get method...e.g.: var obj = $('#example').get(0);
– Matt Huggins
Sep 24 '10 at 22:25
...
Returning the product of a list
...
Without using lambda:
from operator import mul
reduce(mul, list, 1)
it is better and faster. With python 2.7.5
from operator import mul
import numpy as np
import numexpr as ne
# from functools import reduce # python3 compatibility
a = range(1,...
Position of least significant bit that is set
.../optimisation discussion attached. My favourite solution for your problem (from that site) is «multiply and lookup»:
unsigned int v; // find the number of trailing zeros in 32-bit v
int r; // result goes here
static const int MultiplyDeBruijnBitPosition[32] =
{
0, 1, 28, 2, 29, 14,...
Do AJAX requests retain PHP Session info?
...I had a user logged onto my site, having his id stored in $_SESSION , and from his browser he clicked a 'Save' button which would make an AJAX request to the server. Will his $_SESSION and cookies be retained in this request, and can I safely rely on the id being present in the $_SESSION ?
...
Where is PATH_MAX defined in Linux?
...
Beware: PATH_MAX is different from NAME_MAX (and the x-ref'd article in part seems to confuse these two, at least in part). Note: POSIX <limits.h> says: A definition of one of the symbolic constants in the following list shall be omitted from the &l...
Finding the path of the program that will execute from the command line in Windows
...
@shahar_m: did you try the script below from Michael Burr? It's not built-in, but it might do what you need.
– Chris Schmich
Apr 28 '11 at 17:19
...
How does free know how much to free?
... Why not, and can I use this same technique in my own functions to save me from needing to cart around the extra variable of the array's length?
...
List of Delphi language features and version in which they were introduced/deprecated
...in Delphi 3
What's New in Delphi 2
Delphi 1 Features
The full list from Embarcadero: What's New
See also: David I's list
To summarize:
Delphi 10.3.x, 10.4 (not yet out, this is speculative)
Custom managed records
Nullable types
Support for macOS 64-bit
Support for Android 64-b...