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How do I repeat an edit on multiple lines in Vim?
...ESC j h q
use with:
@ a
Explanation: q a starts recording a macro to register a, q ends recording. There are registers a to z available for this.
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Convert a row of a data frame to vector
... it to a numeric vector:
as.numeric(df[1,])
As @Roland suggests, unlist(df[1,]) will convert the one-row data frame to a numeric vector without dropping the names. Therefore unname(unlist(df[1,])) is another, slightly more explicit way to get to the same result.
As @Josh comments below, if y...
How to remove leading and trailing white spaces from a given html string?
...mple code in JavaScript to remove leading and trailing white spaces from this string?
7 Answers
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SQL Update with row_number()
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answered Nov 30 '12 at 21:48
Aleksandr FedorenkoAleks...
What is the best way to exit a function (which has no return value) in python before the function en
... function without a return value. The way I think my program should behave is explained in this pseudocode:
3 Answers
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Disable browser cache for entire ASP.NET website
I am looking for a method to disable the browser cache for an entire ASP.NET MVC Website
8 Answers
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Get bitcoin historical data [closed]
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Actually, you CAN get the whole Bitcoin trades history from Bitcoincharts in CSV format here :
http://api.bitcoincharts.com/v1/csv/
it is updated twice a day for active exchanges, and there is a few dead exchanges, too.
EDIT: Since there are no column headers in the CSVs...
Strip html from string Ruby on Rails
I'm working with Ruby on Rails, Is there a way to strip html from a string using sanitize or equal method and keep only text inside value attribute on input tag?
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difference between css height : 100% vs height : auto
I was asked a question in an interview that "what is the difference between the css height:100% and height:auto ?"
4 An...
How can I use a file in a command and redirect output to the same file without truncating it?
...rst, then executes the command. So by the time grep looks at file_name, it is already empty. You can use a temporary file though.
#!/bin/sh
tmpfile=$(mktemp)
grep -v 'seg[0-9]\{1,\}\.[0-9]\{1\}' file_name > ${tmpfile}
cat ${tmpfile} > file_name
rm -f ${tmpfile}
like that, consider using mkt...