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Get just the filename from a path in a Bash script [duplicate]
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Where can I set environment variables that crontab will use?
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Have 'cron' run a shell script that sets the environment before running the command.
Always.
# @(#)$Id: crontab,v 4.2 2007/09/17 02:41:00 jleffler Exp $
# Crontab file for Home Directory for Jonathan Leffler (JL)
#-----------------------------...
Get the current git hash in a Python script
I would like to include the current git hash in the output of a Python script (as a the version number of the code that generated that output).
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Passing arguments to “make run”
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TL;DR don't try to do this
$ make run arg
instead create script:
#! /bin/sh
# rebuild prog if necessary
make prog
# run prog with some arguments
./prog "$@"
and do this:
$ ./buildandrunprog.sh arg
answer to the stated question:
you can use a variable in the recipe
run: pr...
Naming “class” and “id” HTML attributes - dashes vs. underlines [closed]
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Use Hyphens to ensure isolation between your HTML and JavaScript.
Why? see below.
Hyphens are valid to use in CSS and HTML but not for JavaScript Objects.
A lot of browsers register HTML Ids as global objects on the window/document object, in big projects, this can become a real ...
What are the special dollar sign shell variables?
...f the most recent background command.
$0 is the name of the shell or shell script.
Most of the above can be found under Special Parameters in the Bash Reference Manual. There are all the environment variables set by the shell.
For a comprehensive index, please see the Reference Manual Variable In...
What does a Ajax call response like 'for (;;); { json data }' mean? [duplicate]
...to this mechanism.
These infinite loops are a countermeasure against "Javascript hijacking", a type of attack that gained public attention with an attack on Gmail that was published by Jeremiah Grossman.
The idea is as simple as beautiful: A lot of users tend to be logged in permanently in Gmail o...
How can I scroll to a specific location on the page using jquery?
...dy').animate({
scrollTop: 0,
scrollLeft: 300
}, 1000);
Plain javascript
scrolling with window.scroll
window.scroll(horizontalOffset, verticalOffset);
only to sum up, use the window.location.hash to jump to element with ID
window.location.hash = '#your-page-element';
Directly in HTML...
Shell script to delete directories older than n days
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I was struggling to get this right using the scripts provided above and some other scripts especially when files and folder names had newline or spaces.
Finally stumbled on tmpreaper and it has been worked pretty well for us so far.
tmpreaper -t 5d ~/Downloads
tmpre...
Python circular importing?
... function call, def, class). Assuming your imports occur at the top of the script, then here's what's happening:
When you try to import World from world, the world script gets executed.
The world script imports Field, which causes the entities.field script to get executed.
This process continues u...