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The way to check a HDFS directory's size?
...s [directory]
Since 0.20.203 (dead link) 1.0.4 and still compatible through 2.6.0:
hdfs dfs -du [-s] [-h] URI [URI …]
You can also run hadoop fs -help for more info and specifics.
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Add 10 seconds to a Date
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There's a setSeconds method as well:
var t = new Date();
t.setSeconds(t.getSeconds() + 10);
For a list of the other Date functions, you should check out MDN
setSeconds will correctly handle wrap-around cases:
var d;
d = new Date('2014-01-01 10:11:55');
alert(d.getMinutes() + ':' + d.g...
How do I tell CPAN to install all dependencies?
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Here is the one-liner making these changes permanent including automatic first-time CPAN configuration:
perl -MCPAN -e 'my $c = "CPAN::HandleConfig"; $c->load(doit => 1, autoconfig => 1); $c->edit(prerequisites_policy => "follow"); $c-&...
Java String array: is there a size of method?
I come from a php background and in php, there is an array_size() function which tells you how many elements in the array are used.
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Locate current file in IntelliJ
...hat you want. You need to hit Enter afterwards as IDEA allows multiple "targets" for navigation (project structure, file structure etc).
(Note you can also set AutoScroll to Source and AutoScroll from source using the two "boxes with arrows" buttons above the project structure view but this can get...
MySQL主从服务器数据一致性的核对与修复 - 数据库(内核) - 清泛网 - 专注C/...
...的错误信息，那么恭喜你中招了：
mysql> SHOW SLAVE STATUS\G
Last_Errno: 1062
Last_Error: Error 'Duplicate entry '...' for key ...' on query.
为啥会出现唯一索引键值重复？最大的可能是错误的对从服务器做了写操作！出现此类错误的时候，很多...
Any decent text diff/merge engine for .NET? [closed]
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You can grab the COM component that uses Google's Diff/Patch/Match. It works from .NET.
Update, 2010 Oct 17: The Google Diff/Patch/Merge code has been ported to C#. The COM component still works, but if you're coming from .NET, y...
SQL command to display history of queries
... history in my MYSQL Query Browser. What is the sql statement for displaying history?
7 Answers
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What is the command to list the available avdnames
I know I can start the emulator avd by typing
8 Answers
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How do I parse a URL query parameters, in Javascript? [duplicate]
In Javascript, how can I get the parameters of a URL string (not the current URL)?
2 Answers
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