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What is a elegant way in Ruby to tell if a variable is a Hash or an Array?
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edited Mar 20 '11 at 6:35
answered Mar 20 '11 at 6:30
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Converting between strings and ArrayBuffers
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Update 2016 - five years on there are now new methods in the specs (see support below) to convert between strings and typed arrays using proper encoding.
TextEncoder
The TextEncoder represents:
The TextEncoder interface repres...
How to make an element in XML schema optional?
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answered Feb 11 '12 at 20:28
Dmitry KudryavtsevDmitry Kudryavtsev
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How to select all records from one table that do not exist in another table?
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answered Apr 21 '10 at 20:20
KrisKris
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How to test if a string is basically an integer in quotes using Ruby
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How can I debug a .BAT script?
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edited Nov 20 '13 at 16:47
answered Nov 20 '13 at 12:01
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How to select the first element in the dropdown using jquery?
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edited Nov 1 '18 at 20:08
Zander
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answered Sep 8 '09 at 15:11
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jQuery - add additional parameters on submit (NOT ajax)
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MichelMichel
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Pushing a local branch up to GitHub
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answered Jan 20 '11 at 20:48
TomTom
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Assign pandas dataframe column dtypes
...df = pd.DataFrame({'x': {0: 'a', 1: 'b'}, 'y': {0: '1', 1: '2'}, 'z': {0: '2018-05-01', 1: '2018-05-02'}})
df.dtypes
x object
y object
z object
dtype: object
df
x y z
0 a 1 2018-05-01
1 b 2 2018-05-02
You can apply these to each column you want to convert:
df["y"]...