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Redis is single-threaded, then how does it do concurrent I/O?
...ts by executing several flows corresponding to those clients with only one computation unit. In this context, parallelism would mean the server is able to perform several things at the same time (with multiple computation units), which is different.
For instance a bartender is able to look after se...
Difference between rake db:migrate db:reset and db:schema:load
... db:migrate
For further information please have a look at https://github.com/rails/rails/blob/v3.2.12/activerecord/lib/active_record/railties/databases.rake (for Rails 3.2.x) and https://github.com/rails/rails/blob/v4.0.5/activerecord/lib/active_record/railties/databases.rake (for Rails 4.0.x)
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Overwrite single file in my current branch with the same file in the master branch?
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Python - json without whitespaces
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I arrived here trying to compare the Django request.body to the request.data so folks might find this useful bytes(json.dumps(request.data, separators=(',', ':')), 'utf-8') == request.body
– Matt
Jun 12 at 14:26...
What are the differences between Clojure, Scheme/Racket and Common Lisp?
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They all have a lot in common:
Dynamic languages
Strongly typed
Compiled
Lisp-style syntax, i.e. code is written as a Lisp data structures (forms) with the most common pattern being function calls like: (function-name arg1 arg2)
Powerful macro sy...
Regex to match a digit two or four times
... these will create a capturing group. Further details here: stackoverflow.com/questions/3512471/non-capturing-group
– Jeremy Moritz
Oct 15 '14 at 20:44
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Git search for string in a single file's history
...g -G'bar' -- foo.rb to search for diff that contains 'bar' rather than for commits that changed number of occurences of 'bar' (see git-log manpage).
– Jakub Narębski
Apr 18 '12 at 19:16
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Remove multiple attributes with jQuery's removeAttr
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Difference between double and single curly brace in angular JS?
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{{}} - double curly braces:
{{}} are Angular expressions and come quite handy when you wish to write stuff to HTML:
<div>
{{planet.name == "Earth" ? "Yeah! We 're home!" : "Eh! Where 're we?"}}
</div>
<!-- with some directives like `ngSrc` -->
<img ng-src="htt...