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Why is (object)0 == (object)0 different from ((object)0).Equals((object)0)?
...Int32.Equals and this checks for a boxed integer. Both integer values are 0 hence they are equal
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Can a class member function template be virtual?
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answered Mar 1 '10 at 8:52
sbisbi
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How to return only the Date from a SQL Server DateTime datatype
Returns: 2008-09-22 15:24:13.790
43 Answers
43
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How to round to 2 decimals with Python?
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edited Nov 26 '19 at 18:40
Boris
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answered Dec 8...
Dynamically select data frame columns using $ and a character value
...itten as
`$`(df , V1)
or indeed
`$`(df , "V1")
But...
`$`(df , paste0("V1") )
...for instance will never work, nor will anything else that must first be evaluated in the second argument. You may only pass a string which is never evaluated.
Instead use [ (or [[ if you want to extract only...
How to compute the sum and average of elements in an array?
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var sum = 0;
for( var i = 0; i < elmt.length; i++ ){
sum += parseInt( elmt[i], 10 ); //don't forget to add the base
}
var avg = sum/elmt.length;
document.write( "The sum of all the elements is: " + sum + " The average is: " + ...
How to center absolute div horizontally using CSS?
...v and want it to be centered horizontally - although I'm giving it margin:0 auto; it's not centered...
8 Answers
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Delete the first three rows of a dataframe in pandas
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edited Oct 17 '18 at 1:06
Acumenus
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answered...
How to drop a list of rows from Pandas dataframe?
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401
Use DataFrame.drop and pass it a Series of index labels:
In [65]: df
Out[65]:
one two...
How to run cron job every 2 hours
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Just do:
0 */2 * * * /home/username/test.sh
The 0 at the beginning means to run at the 0th minute. (If it were an *, the script would run every minute during every second hour.)
Don't forget, you can check syslog to see if it eve...