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add a string prefix to each value in a string column using Pandas
...gt;>> df = pd.DataFrame({'col':['a',0]})
>>> df
col
0 a
1 0
>>> df['col'] = 'str' + df['col'].astype(str)
>>> df
col
0 stra
1 str0
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Why do python lists have pop() but not push()
...y a list.pop that removes and returns the last element (that indexed at -1) and list.append semantic is consistent with that use?
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Can you nest html forms?
...a page but they should not be nested.
From the html5 working draft:
4.10.3 The form element
Content model:
Flow content, but with no form element descendants.
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How do I do a multi-line string in node.js?
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168
node v4 and current versions of node
As of ES6 (and so versions of Node greater than v4), a n...
ReSharper “Cannot resolve symbol” even when project builds
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Maven compile with multiple src directories
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how get yesterday and tomorrow datetime in c#
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128
You can find this info right in the API reference.
var today = DateTime.Today;
var tomorrow =...
Convert DataFrame column type from string to datetime, dd/mm/yyyy format
...European times (but beware this isn't strict).
Here it is in action:
In [11]: pd.to_datetime(pd.Series(['05/23/2005']))
Out[11]:
0 2005-05-23 00:00:00
dtype: datetime64[ns]
You can pass a specific format:
In [12]: pd.to_datetime(pd.Series(['05/23/2005']), format="%m/%d/%Y")
Out[12]:
0 2005-...
How do you get the length of a list in the JSF expression language?
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167
Yes, since some genius in the Java API creation committee decided that, even though certain cl...