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What does $_ mean in PowerShell?
... the current value in the pipe line, which is called $PSItem in Powershell 3 and newer.
1,2,3 | %{ write-host $_ }
or
1,2,3 | %{ write-host $PSItem }
For example in the above code the %{} block is called for every value in the array. The $_ or $PSItem variable will contain the current val...
how to schedule a job for sql query to run daily?
...' ?'
– Bilal Fazlani
Jan 4 '13 at 5:22
6
It goes without saying that depending on who you log on ...
How to remove focus border (outline) around text/input boxes? (Chrome) [duplicate]
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edited Apr 19 at 10:37
johannchopin
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answer...
Adding information to an exception?
...bar('arg1')
Traceback (most recent call last):
File "test.py", line 13, in <module>
bar('arg1')
File "test.py", line 11, in bar
raise type(e)(e.message + ' happens at %s' % arg1)
IOError: Stuff happens at arg1
Update 1
Here's a slight modification that preserves the original...
How can I change the default width of a Twitter Bootstrap modal box?
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32 Answers
32
Active
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Does Foreign Key improve query performance?
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edited Mar 16 '12 at 8:35
onedaywhen
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answer...
App Inventor 2 数学积木完全指南：从加减乘除到位运算，一篇搞定所有计算...
...现三个甚至更多数字同时运算：
加法： 1 + 2 + 3 + 4 = 10 （一个积木搞定，不用嵌套）
乘法： 2 x 3 x 4 = 24 （同理，一个积木搞定）
幂运算积木 ^ 也非常实用：2 ^ 3 = 8，...
Find row where values for column is maximal in a pandas DataFrame
...t; import numpy as np
>>> df = pandas.DataFrame(np.random.randn(5,3),columns=['A','B','C'])
>>> df
A B C
0 1.232853 -1.979459 -0.573626
1 0.140767 0.394940 1.068890
2 0.742023 1.343977 -0.579745
3 2.125299 -0.649328 -0.211692
4 -0.187253 1.908618 -...
What does -> mean in Python function definitions?
I've recently noticed something interesting when looking at Python 3.3 grammar specification :
7 Answers
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Why does the default parameterless constructor go away when you create one with parameters
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answered Aug 3 '12 at 8:43
Dan PuzeyDan Puzey
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