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The way to check a HDFS directory's size?
I know du -sh in common Linux filesystems. But how to do that with HDFS?
10 Answers
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How to compare two tags with git?
...you are doing a diff on the commits between them.
Also, a good reference: http://learn.github.com/p/diff.html
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Count number of occurences for each unique value
Let's say I have:
13 Answers
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Are tuples more efficient than lists in Python?
Is there any performance difference between tuples and lists when it comes to instantiation and retrieval of elements?
8 A...
JPA and Hibernate - Criteria vs. JPQL or HQL
...enerated SQL, taking more time to execute.
Regarding fetching strategies [http://www.hibernate.org/315.html]
Criteria respects the laziness settings in your mappings and guarantees that what you want loaded is loaded. This means one Criteria query might result in several SQL immediate SELEC...
Is there a pretty print for PHP?
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How about print_r?
http://www.php.net/print_r
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answered Jul 22 '09 at 20:54
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Single vs double quotes in JSON
... trickier situation with nested quotes eg "{'link':'<a href="mylink">http://my.com</a>'}" ? In this case, ast.literal_eval throws syntax error
– alancalvitti
Apr 23 '19 at 16:04
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.htaccess mod_rewrite - how to exclude directory from rewrite rule
...ST_URI} !^/test/
RewriteCond %{REQUEST_URI} !^/my-folder/
RewriteRule (.*) http://www.newdomain.com/$1 [R=301,L]
This redirects (permanently with a 301 redirect) all traffic to the site to http://www.newdomain.com, except requests to resources in the /test and /my-folder directories. We transfer ...
PostgreSQL query to list all table names?
Is there any query available to list all tables in my Postgres DB.
7 Answers
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Where is Erlang used and why? [closed]
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From Programming Erlang:
alt text http://bks8.books.google.com/books?id=Qr_WuvfTSpEC&printsec=frontcover&img=1&zoom=5&sig=ACfU3U2F4YY4KqO0vCuZ4WEZjdE2yFFvvg
Many companies are using Erlang in their production systems:
• Amazon uses Erlang to...