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Filter rows which contain a certain string
...the mtcars data set. Imagine you are only interested in cars produced by Mazda or Toyota.
mtcars$type <- rownames(mtcars)
dplyr::filter(mtcars, grepl('Toyota|Mazda', type))
mpg cyl disp hp drat wt qsec vs am gear carb type
1 21.0 6 160.0 110 3.90 2.620 16.46 0 1 4 4...
Applying .gitignore to committed files
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How do I show a Save As dialog in WPF?
...cIver
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Is there any way to view the currently mapped keys in Vim?
...attr-
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Java - Including variables within strings?
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CocoaPods and GitHub forks
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How to undo the effect of “set -e” which makes bash exit immediately if any command fails?
...ctive bash shell, bash will exit immediately if any command exits with non-zero. How can I undo this effect?
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How does Spring autowire by name when more than one matching bean is found?
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Scaling Node.js
...ld use node-validator.
var check = require('validator').check,
sanitize = require('validator').sanitize
//Validate
check('test@email.com').len(6, 64).isEmail(); //Methods are chainable
check('abc').isInt(); //Throws 'Invalid integer'
check('abc', 'Please en...
git rebase fatal: Needed a single revision
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