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Return first match of Ruby regex
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135
You could try variableName[/regular expression/]. This is an example output from irb:
irb(main...
DateTime to javascript date
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AxelEckenbergerAxelEckenberger
15.4k33 gold badges4444 silver badges6666 bronze badges
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How to read data when some numbers contain commas as thousand separator?
...ues are expressed as strings with commas as thousand separator, e.g. "1,513" instead of 1513 . What is the simplest way to read the data into R?
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How to get an enum which is created in attrs.xml in code
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mykolaj
93488 silver badges1717 bronze badges
answered Sep 24 '13 at 20:58
Andy MellAndy Mell
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Convert a binary NodeJS Buffer to JavaScript ArrayBuffer
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138
Instances of Buffer are also instances of Uint8Array in node.js 4.x and higher. Thus, the most...
How to generate random SHA1 hash to use as ID in node.js?
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edited May 23 '17 at 12:10
Community♦
111 silver badge
answered Feb 23 '12 at 6:28
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How to remove convexity defects in a Sudoku square?
...ges:
lY = ImageMultiply[MorphologicalBinarize[GaussianFilter[srcAdjusted, 3, {2, 0}], {0.02, 0.05}], mask];
lX = ImageMultiply[MorphologicalBinarize[GaussianFilter[srcAdjusted, 3, {0, 2}], {0.02, 0.05}], mask];
I use connected component analysis again to extract the grid lines from these images...
How to find out element position in slice?
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3
I agree with Evan. Additional comment: it's more idiomatic to return just an int where -1 indicates "not found" (like bytes.IndexByte)
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Drop columns whose name contains a specific string from pandas DataFrame
...st2', 'riri'))
print df
Test1 toto test2 riri
0 0.923249 0.572528 0.845464 0.144891
1 0.020438 0.332540 0.144455 0.741412
cols = [c for c in df.columns if c.lower()[:4] != 'test']
df=df[cols]
print df
toto riri
0 0.572528 0.144891
1 0.332540 0.741412
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Assign pandas dataframe column dtypes
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In [22]: df.dtypes
Out[22]:
x object
y object
dtype: object
In [23]: df.convert_objects(convert_numeric=True)
Out[23]:
x y
0 a 1
1 b 2
In [24]: df.convert_objects(convert_numeric=True).dtypes
Out[24]:
x object
y int64
dtype: object
Magic! (Sad to see it deprecated.)
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