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How do you delete an ActiveRecord object?
...llow you to delete records
without a primary key
Note: from @hammady's comment, user.destroy won't work if User model has no primary key.
Note 2: From @pavel-chuchuva's comment, destroy_all with conditions and delete_all with conditions has been deprecated in Rails 5.1 - see guides.rubyonrails....
Manually adding a Userscript to Google Chrome
...alog:
Click Add.
Notes:
Scripts installed this way have limitations compared to a Greasemonkey (Firefox) script or a Tampermonkey script. See Cross-browser user-scripting, Chrome section.
Controlling the Script and name:
By default, Chrome installs scripts in the Extensions folder1, ful...
How to change navbar collapse threshold using Twitter bootstrap-responsive?
...
As mentioned in my comment on @Andres Ilich's answer, directly updating source code seems the lesser of two evils when it comes to maintainability, so I will accept this solution for now. I can live with 767px as the minimum threshold, though I...
TDD/BDD screencast/video resources [closed]
...ng an Abstract Factory
Adding a Sum operator
Adding Prime Factors Operator
Composing Operators and Programming
the Calculator
Using FitNesse to Program the
Calculator
A series of videos on creating the shunting yard algorithm in C# using Resharper, Visual Studio 2008 and TDD.
Shunting Yard Al...
Why start a shell command with a backslash?
Why is the command starting with \ ?
This is the site where I saw it.
2 Answers
2
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django 1.5 - How to use variables inside static tag
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Print PHP Call Stack
...
this regularly makes my php run out of memory. I recommend Tobiasz' solution.
– peedee
Jul 16 '15 at 9:19
...
How to hide element using Twitter Bootstrap and show it using jQuery?
...d-none');
To toggle it: $("#myId").toggleClass('d-none');
(thanks to the comment by Fangming)
Bootstrap 3.x
First, don't use .hide! Use .hidden. As others have said, .hide is deprecated,
.hide is available, but it does not always affect screen readers and is deprecated as of v3.0.1
Second,...
Download file from web in Python 3
...of urllib.request.urlopen:
import urllib.request
...
url = 'http://example.com/'
response = urllib.request.urlopen(url)
data = response.read() # a `bytes` object
text = data.decode('utf-8') # a `str`; this step can't be used if data is binary
The easiest way to download and save a file is to ...
Can you run GUI applications in a Docker container?
...e package repository is up to date
RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list
RUN apt-get update
# Install vnc, xvfb in order to create a 'fake' display and firefox
RUN apt-get install -y x11vnc xvfb firefox
RUN mkdir ~/.vnc
# Se...