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How to delete a row by reference in data.table?
My question is related to assignment by reference versus copying in data.table . I want to know if one can delete rows by reference, similar to
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angular.element vs document.getElementById or jQuery selector with spin (busy) control
... using the "Angularised" version of the Spin control, as documented here: http://blog.xvitcoder.com/adding-a-weel-progress-indicator-to-your-angularjs-application/
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PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
...ilar to:
string(40) "5fe69c95ed70a9869d9f9af7d8400a6673bb9ce9"
More info: http://php.net/manual/en/function.random-bytes.php
PHP 5 (outdated)
I was just looking into how to solve this same problem, but I also want my function to create a token that can be used for password retrieval as well. This m...
Laravel - Eloquent or Fluent random row
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How to create a printable Twitter-Bootstrap page
...le Hidden
Bootstrap 3 update:
Print classes are now in documents: http://getbootstrap.com/css/#responsive-utilities-print
Similar to the regular responsive classes,
use these for toggling content for print.
Class Browser Print
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How to run mvim (MacVim) from Terminal?
... as the editor for Git (version control), but I can't run 'mvim' from the command line as it isn't recognised. How do I setup mvim so I can run it from Terminal?
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How to make all Objects in AWS S3 bucket public by default?
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Go to http://awspolicygen.s3.amazonaws.com/policygen.html
Fill in the details such as:
In Action select "GetObject"
Select "Add Statement"
Then select "Generate Policy"
Copy the text example:
{
"Id": "Policy1397632521960",
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How to sum a variable by group
...e(cbind(x$Frequency, x$Metric2, x$Metric3) ...
(embedding @thelatemail comment), aggregate has a formula interface too
aggregate(Frequency ~ Category, x, sum)
Or if you want to aggregate multiple columns, you could use the . notation (works for one column too)
aggregate(. ~ Category, x, sum)...
Node JS Error: ENOENT
... perfectly. The book may have missed mentioning that small step
check out http://webchat.freenode.net/?channels=node.js to chat with some of the node.js community
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