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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?
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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...
What is the best regular expression to check if a string is a valid URL?
...
I wrote my URL (actually IRI, internationalized) pattern to comply with RFC 3987 (http://www.faqs.org/rfcs/rfc3987.html). These are in PCRE syntax.
For absolute IRIs (internationalized):
/^[a-z](?:[-a-z0-9\+\.])*:(?:\/\/(?:(?:%[0-9a-f][0-9a-f]|[-a-z0-9\._~\x{A0}-\x{D7FF}\x{F900}-\x{...
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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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...
IEnumerable and Recursion using yield return
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100
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fatal: The current branch master has no upstream branch
...the authentication issue.
That depends on your url (ssh as in 'git@github.com/yourRepo, or https as in https://github.com/You/YourRepo)
For https url:
If your account is protected by the two-factor authentication, your regular password won't work (for https url), as explained here or here.
Sam...