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Subprocess changing directory
...call a command named cd.
But cd is a shell internal. So you can only call it as
subprocess.call('cd ..', shell=True) # pointless code! See text below.
But it is pointless to do so. As no process can change another process's working directory (again, at least on a UNIX-like OS, but as well on Win...
urlencode vs rawurlencode?
...
It will depend on your purpose. If interoperability with other systems is important then it seems rawurlencode is the way to go. The one exception is legacy systems which expect the query string to follow form-encoding style ...
Run a single migration file
...s may require AddFoos.new.up rather than AddFoos.up.
An alternative way (without IRB) which relies on the fact that require returns an array of class names:
script/runner 'require("db/migrate/20090408054532_add_foos.rb").first.constantize.up'
Note that if you do this, it probably won't update th...
How do you produce a .d.ts “typings” definition file from an existing JavaScript library?
... a few options available for you depending on the library in question, how it's written, and what level of accuracy you're looking for. Let's review the options, in roughly descending order of desirability.
Maybe It Exists Already
Always check DefinitelyTyped (https://github.com/DefinitelyTyped/De...
How to print to stderr in Python?
There are several ways to write to stderr:
15 Answers
15
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What's the use of ob_start() in php?
...Start remembering everything that would normally be outputted, but don't quite do anything with it yet."
For example:
ob_start();
echo("Hello there!"); //would normally get printed to the screen/output to browser
$output = ob_get_contents();
ob_end_clean();
There are two other functions you typi...
jQuery UI: Datepicker set year range dropdown to 100 years
...ult: "c-10:c+10"
The range of years displayed in the year drop-down: either relative to today's year ("-nn:+nn"), relative to the currently selected year ("c-nn:c+nn"), absolute ("nnnn:nnnn"), or combinations of these formats ("nnnn:-nn"). Note that this option only affects what appears in the ...
Twitter API returns error 215, Bad Authentication Data
I am trying to call following Twitter's API to get a list of followers for a user.
15 Answers
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CSS styling in Django forms
...
Taken from my answer to:
How to markup form fields with <div class='field_type'> in Django
class MyForm(forms.Form):
myfield = forms.CharField(widget=forms.TextInput(attrs={'class' : 'myfieldclass'}))
or
class MyForm(forms.ModelForm):
class Meta:
mode...
How do you detect/avoid Memory leaks in your (Unmanaged) code? [closed]
...t practices to detect memory leaks? And coding guidelines to avoid? (As if it's that simple ;)
29 Answers
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