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Pip freeze vs. pip list
...ere, django==1.4.2 implies install django version 1.4.2 (even though the latest is 1.6.x).
If you do not specify ==1.4.2, the latest version available would be installed.
You can read more in "Virtualenv and pip Basics",
and the official "Requirements File Format" documentation.
...
Use underscore inside Angular controllers
...a lot less likely to want to substitute out your underscore library during testing than some other more specific dependency it's understandable that it doesn't seem necessary.
– fess .
Jun 2 '13 at 3:13
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How do I preview emails in Rails?
...previewing emails in Rails 4.1. For example, check this out:
# located in test/mailers/previews/notifier_mailer_preview.rb
class NotifierPreview < ActionMailer::Preview
# Accessible from http://localhost:3000/rails/mailers/notifier/welcome
def welcome
Notifier.welcome(User.first)
end
...
Match everything except for specified strings
...x library and it only works like this : ^(?!red|green|blue). Also true for testing it on regex101.com . So is the above a typo missing a ^ or does it actually work like that in Java/Perl/Python .. ?
– Peter
Jul 31 '19 at 9:47
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How to split one string into multiple strings separated by at least one space in bash shell?
...or start with a dash. For example:
text="This is a test"
set -- junk $text
shift
for word; do
echo "[$word]"
done
This prints
[This]
[is]
[a]
[test]
share
|
improve th...
Validate that a string is a positive integer
I would like the simplest fail-safe test to check that a string in JavaScript is a positive integer.
13 Answers
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Test for existence of nested JavaScript object key
... thrown.
You can either simply catch the exception, or make a function to test the existence of multiple levels, something like this:
function checkNested(obj /*, level1, level2, ... levelN*/) {
var args = Array.prototype.slice.call(arguments, 1);
for (var i = 0; i < args.length; i++) {
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How to count the number of files in a directory using Python
...
os.listdir() will be slightly more efficient than using glob.glob. To test if a filename is an ordinary file (and not a directory or other entity), use os.path.isfile():
import os, os.path
# simple version for working with CWD
print len([name for name in os.listdir('.') if os.path.isfile(name...
What is the difference between CMD and ENTRYPOINT in a Dockerfile?
... the image without any argument will ping the localhost:
$ docker run -it test
PING localhost (127.0.0.1): 48 data bytes
56 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.096 ms
56 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.088 ms
56 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.088 ms
^C--- l...
Webdriver Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms
I have box where I run tests. It seems like Jenkins would ssh in and execute commands described in the specific job that's running.
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