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When do we need curly braces around shell variables?
... unconditionally required when:
expanding array elements, as in ${array[42]}
using parameter expansion operations, as in ${filename%.*} (remove extension)
expanding positional parameters beyond 9: "$8 $9 ${10} ${11}"
Doing this everywhere, instead of just in potentially ambiguous cases, can be c...
How to increase heap size of an android application?
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211
You can use android:largeHeap="true" to request a larger heap size, but this will not work on ...
Can we use join for two different database tables?
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2 Answers
2
Active
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Set Viewbag before Redirect
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245
When you use redirection, you shall not use ViewBag, but TempData
public ActionResult Action1...
Throw an error in a MySQL trigger
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Laurel
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answered Aug 1 '08 at 13:02
JustinJustin
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Read only the first line of a file?
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Use the .readline() method (Python 2 docs, Python 3 docs):
with open('myfile.txt') as f:
first_line = f.readline()
Some notes:
As noted in the docs, unless it is the only line in the file, the string returned from f.readline() will contain a trailing ...
Rename all files in directory from $filename_h to $filename_half?
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edited Aug 26 '16 at 22:11
sclarson
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How to get a value from a cell of a dataframe?
...value using the column name:
In [3]: sub_df
Out[3]:
A B
2 -0.133653 -0.030854
In [4]: sub_df.iloc[0]
Out[4]:
A -0.133653
B -0.030854
Name: 2, dtype: float64
In [5]: sub_df.iloc[0]['A']
Out[5]: -0.13365288513107493
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