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get name of a variable or parameter [duplicate]
I would like to get the name of a variable or parameter:
3 Answers
3
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How do I compare two strings in Perl?
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See perldoc perlop. Use lt, gt, eq, ne, and cmp as appropriate for string comparisons:
Binary eq returns true if the left argument is stringwise equal to the right argument.
Binary ne returns true if the left argument is stringwise not equal to the right argument.
Binary cmp returns -1, ...
what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?
...others
hadoop dfs <args>
dfs is very specific to HDFS. would work for operation relates to HDFS. This has been deprecated 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 ins...
GCC -fPIC option
I have read about GCC's Options for Code Generation Conventions , but could not understand what "Generate position-independent code (PIC)" does. Please give an example to explain me what does it mean.
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Difference between Git and GitHub
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Git is a revision control system, a tool to manage your source code history.
GitHub is a hosting service for Git repositories.
So they are not the same thing: Git is the tool, GitHub is the service for projects that use Git.
To get your code to GitHub, have a look here.
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What is the purpose of class methods?
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Class methods are for when you need to have methods that aren't specific to any particular instance, but still involve the class in some way. The most interesting thing about them is that they can be overridden by subclasses, something that's s...
Rename specific column(s) in pandas
...a dataframe called data . How would I rename the only one column header? For example gdp to log(gdp) ?
5 Answers
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What does -D_XOPEN_SOURCE do/mean?
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When you do
#define _XOPEN_SOURCE <some number>
or
cc -D_XOPEN_SOURCE=<some number>
it tells your compiler to include definitions for some extra functions that are defined in the X/Open and POSIX standards.
This will give you some extra functionality that exists ...
Is there a unique Android device ID?
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Settings.Secure#ANDROID_ID returns the Android ID as an unique for each user 64-bit hex string.
import android.provider.Settings.Secure;
private String android_id = Secure.getString(getContext().getContentResolver(),
Secure.ANDROID_...
“The underlying connection was closed: An unexpected error occurred on a send.” With SSL Certificate
...get this exception "THE UNDERLYING CONNECTION WAS CLOSED: AN UNEXPECTED ERROR OCCURRED ON A SEND" in my logs and it is breaking our OEM integration with our email marketing system at random times varying from [1hour - 4 hours]
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