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How to specify a multi-line shell variable?
...s. By "unanticipated", I mean it runs in a context where you aren't specifically looking at its exit status. false by itself, for instance, would exit the shell. false || true would not, since you are anticipating the non-zero exit status by specifying another command to run if the first fails.
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Run a JAR file from the command line and specify classpath
...Export function). My dependencies are all in a directory labeled lib . I can't seem to get a straight answer on how to execute my JAR file while specifying it should use the lib/* as the classpath.
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Pandas dataframe get first row of each group
...nd
4 5 first
5 6 first
6 7 fourth
To get n first records, you can use head():
>>> df.groupby('id').head(2).reset_index(drop=True)
id value
0 1 first
1 1 second
2 2 first
3 2 second
4 3 first
5 3 third
6 4 second
7 4 fifth
8 5 fir...
How to prevent browser page caching in Rails
... this out - http://blog.serendeputy.com/posts/how-to-prevent-browsers-from-caching-a-page-in-rails/ in application_controller.rb
After Rails 5:
class ApplicationController < ActionController::Base
before_action :set_cache_headers
private
def set_cache_headers
response.headers["Cach...
Code for decoding/encoding a modified base64 URL
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Bah, you beat me. I'll just delete my post cause it looks almost like I copied you :)
– AaronLS
Aug 4 '09 at 17:09
3
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Good ways to sort a queryset? - Django
...auths, key=operator.attrgetter('last_name'))
In Django 1.4 and newer you can order by providing multiple fields.
Reference: https://docs.djangoproject.com/en/dev/ref/models/querysets/#order-by
order_by(*fields)
By default, results returned by a QuerySet are ordered by the ordering tuple given by...
Cast a Double Variable to Decimal
How does one cast a double to decimal which is used when doing currency development. Where does the M go?
5 Answers
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Remove/Add Line Breaks after Specific String using Sublime Text
... select all matches.
Once you've selected the text you're looking for, you can use the provided multiple cursors to do whatever text manipulation you want.
Protip: you can manually instantiate multiple cursors by using Command+click (or Control+click) to achieve similar results.
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Why is early return slower than else?
...132258429485, 0.3046679117038593]
Considering that the bytecode is identical, the only difference is the name of the function. In particular the timing test does a lookup on the global name. Try renaming without_else() and the difference disappears:
>>> def no_else(param=False):
if p...
correct way to use super (argument passing)
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Sometimes two classes may have some parameter names in common. In that case, you can't pop the key-value pairs off of **kwargs or remove them from *args. Instead, you can define a Base class which unlike object, absorbs/ignores arguments:
class Base(object):
def __init__(self, *args, **kwar...