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Understanding generators in Python
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Note: this post assumes Python 3.x syntax.†
A generator is simply a function which returns an object on which you can call next, such that for every call it returns some value, until it raises a StopIteration exception, signaling that all values have be...
How to search DOM elements using XPath or CSS selectors in Chrome Developer Tools?
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3 Answers
3
Active
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Git rebase merge conflict cannot continue
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230
There are a couple situations where I've seen rebase get stuck. One is if the changes become nu...
How big is too big for a PostgreSQL table?
...oblem will be the same on any other RDMS that I know of. If you only need 3 months worth of data design in a process to prune off the data you don't need any more. That way you will have a consistent volume of data on the table. Your lucky you know how much data will exist, test it for your volume...
Iterate a list as pair (current, next) in Python
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132
Here's a relevant example from the itertools module docs:
import itertools
def pairwise(iterab...
How do I grab an INI value within a shell script?
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edited May 24 '13 at 6:21
Steven Penny
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Output array to CSV in Ruby
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330
To a file:
require 'csv'
CSV.open("myfile.csv", "w") do |csv|
csv << ["row", "of", "C...
How to select where ID in Array Rails ActiveRecord without exception
...f functions works without throwing exceptions.
Comment.find_all_by_id([2, 3, 5])
will work even if some of the ids don't exist. This works in the
user.comments.find_all_by_id(potentially_nonexistent_ids)
case as well.
Update: Rails 4
Comment.where(id: [2, 3, 5])
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Possible to iterate backwards through a foreach?
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Shimmy Weitzhandler
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answered Jul 31 '09 at 9:40
Sam HarwellSam Harwell
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