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How do I measure time elapsed in Java? [duplicate]
I want to have something like this:
15 Answers
15
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How to inspect Javascript Objects
How can I inspect an Object in an alert box? Normally alerting an Object just throws the nodename:
8 Answers
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Hiding the scroll bar on an HTML page
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Set overflow: hidden; on the body tag like this:
<style type="text/css">
body {
overflow: hidden;
}
</style>
The code above hides both the horizontal and vertical scrollbar.
If you want to hide only the vertical scrollbar, use ov...
How do I round to the nearest 0.5?
I have to display ratings and for that i need increments as follows:
9 Answers
9
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count the frequency that a value occurs in a dataframe column
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Use groupby and count:
In [37]:
df = pd.DataFrame({'a':list('abssbab')})
df.groupby('a').count()
Out[37]:
a
a
a 2
b 3
s 2
[3 rows x 1 columns]
See the online docs: http://pandas.pydata.org/pandas-docs/stable/groupb...
Remove a string from the beginning of a string
I have a string that looks like this:
11 Answers
11
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How to comment lines in rails html.erb files? [duplicate]
Am a newbie to rails ,
please let me know the way to comment out a single line and also to comment out
a block of lines in *.html.erb files.
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Add a prefix string to beginning of each line
...efix/' file
# If you want to create a new file
sed -e 's/^/prefix/' file > file.new
If prefix contains /, you can use any other character not in prefix, or
escape the /, so the sed command becomes
's#^#/opt/workdir#'
# or
's/^/\/opt\/workdir/'
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Extract value of attribute node via XPath
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//Parent[@id='1']/Children/child/@name
Your original child[@name] means an element child which has an attribute name. You want child/@name.
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How to pretty print nested dictionaries?
How can I pretty print a dictionary with depth of ~4 in Python? I tried pretty printing with pprint() , but it did not work:
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