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What does $@ mean in a shell script?
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259
$@ is all of the parameters passed to the script.
For instance, if you call ./someScript.sh ...
what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?
...d and we should use hdfs dfs instead.
hdfs dfs <args>
same as 2nd i.e would work for all the operations related to HDFS and is the recommended command instead of hadoop dfs
below is the list categorized as hdfs commands.
namenode|secondarynamenode|datanode|dfs|dfsadmin|fsck|balancer...
Suppress properties with null value on ASP.NET Web API
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132
In the WebApiConfig:
config.Formatters.JsonFormatter.SerializerSettings =
new...
When to use MyISAM and InnoDB? [duplicate]
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2 Answers
2
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error opening HPROF file: IOException: Unknown HPROF Version
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298
The hprof file you get from Android has android specific format. You should convert hprof file...
Regex select all text between tags
What is the best way to select all the text between 2 tags - ex: the text between all the 'pre' tags on the page.
17 Answe...
地图组件做App到底怎么选？我踩完6个坑，帮你总结了这份横评 - App应用开发...
上周有个读者私信我："用App Inventor 2做了个附近美食地图App，标记点全偏到河里去了，这是bug吗？"——不是bug，是坐标系没搞对。今天就来聊聊App Inventor 2地图组件那些事，帮你少走弯路。
为什么要写这篇？
说实...
How do I increase the number of displayed lines of a Java stack trace dump?
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122
You don't need to; that information is present elsewhere in the stack trace. From the docs of p...
How would you make a comma-separated string from a list of strings?
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1023
my_list = ['a', 'b', 'c', 'd']
my_string = ','.join(my_list)
'a,b,c,d'
This won't work if t...
Why use a prime number in hashCode?
...dern java HashMap implementations keep the number of buckets to a power of 2).
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