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How to get the original value of an attribute in Rails
...previous value.
For rails 5.1+
Copied from Lucas Andrade's answer below: https://stackoverflow.com/a/50973808/9359123
Appending _was is deprecated in rails 5.1, now you should append _before_last_save
Something like:
before_save object
do_something_with object.name_before_last_save
end
W...
Is ASCII code 7-bit or 8-bit?
...eUploader: {
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rvm installation not working: “RVM is not a function”
...irements to see dependency requirements for your operating system
Source: https://rvm.io/rvm/install/
I forget mention that you need to put this code into you ~/.bashrc or ~/.zshrc file and you will not need to write this code again. Cheers!
...
How to loop through files matching wildcard in batch file
...tion modifier, that expands %f to a file name only.
See other modifiers in https://technet.microsoft.com/en-us/library/bb490909.aspx (midway down the page) or just in the next answer.
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Is it possible to make a Tree View with Angular?
...example using a recursive directive: http://jsfiddle.net/n8dPm/
Taken from https://groups.google.com/forum/#!topic/angular/vswXTes_FtM
module.directive("tree", function($compile) {
return {
restrict: "E",
scope: {family: '='},
template:
'<p>{{ family.name }}</p>'+
...
PostgreSQL Connection URL
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Which timestamp type should I choose in a PostgreSQL database?
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Using 'starts with' selector on individual class names
...
you can find a bunch of other cool variations of the jQuery selector here
https://api.jquery.com/category/selectors/
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Bootstrap modal appearing under background
...ootstrap/3.1.1/css/bootstrap.min.css" rel="stylesheet">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
Good:
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css" rel="stylesheet">
<script src="https://max...
Difference between a Postback and a Callback
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...