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Getting error: Peer authentication failed for user “postgres”, when trying to get pgsql working with
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The problem is still your pg_hba.conf file (/etc/postgresql/9.1/main/pg_hba.conf*).
This line:
local all postgres peer
Should be:
local all postgres ...
How to execute multi-line statements within Python's own debugger (PDB)
So I am running a Python script within which I am calling Python's debugger, PDB by writing:
6 Answers
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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...准的awk完全一样，所有的awk扩展都被忽略。
-W copyleft or --copyleft, -W copyright or --copyright
打印简短的版权信息。
-W help or --help, -W usage or --usage
打印全部awk选项和每个选项的简短说明。
-W lint or --lint
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How to deal with “data of class uneval” error from ggplot2?
While trying to overlay a new line to a existing ggplot I am getting the following error:
3 Answers
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Add SUM of values of two LISTS into new LIST
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The zip function is useful here, used with a list comprehension.
[x + y for x, y in zip(first, second)]
If you have a list of lists (instead of just two lists):
lists_of_lists = [[1, 2, 3], [4, 5, 6]]
[sum(x) for x in zip(*lists_of_lists)]
# -> [5, 7, 9]
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How to convert 2D float numpy array to 2D int numpy array?
How to convert real numpy array to int numpy array?
Tried using map directly to array but it did not work.
4 Answers
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HorizontalScrollView within ScrollView Touch Handling
I have a ScrollView that surrounds my entire layout so that the entire screen is scrollable. The first element I have in this ScrollView is a HorizontalScrollView block that has features that can be scrolled through horizontally. I've added an ontouchlistener to the horizontalscrollview to handle ...
How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?
I have a UIImage (Cocoa Touch). From that, I'm happy to get a CGImage or anything else you'd like that's available. I'd like to write this function:
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Unit testing of private methods [duplicate]
...wn class(es) and test via their public interface(s). Then use them privately in the original class.
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What is a “callable”?
...an associated concept that I use all the time without knowing what it really means.
12 Answers
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