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Rails: how do I validate that something is a boolean?
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245
Since Rails 3, you can do:
validates :field, inclusion: { in: [ true, false ] }
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Cancel/kill window.setTimeout() before it happens
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2 Answers
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Active
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AngularJS toggle class using ng-class
...Scroll, 'icon-autoscroll-disabled': !autoScroll}"></i>
Solution 2:
<i ng-class="{true: 'icon-autoscroll', false: 'icon-autoscroll-disabled'}[autoScroll]"></i>
Solution 3 (angular v.1.1.4+ introduced support for ternary operator):
<i ng-class="autoScroll ? 'icon-autoscro...
What does the “@” symbol mean in reference to lists in Haskell?
...the list's tail: pt
Without the @, you'd have to choose between (1) or (2):(3).
This syntax actually works for any constructor; if you have data Tree a = Tree a [Tree a], then t@(Tree _ kids) gives you access to both the tree and its children.
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Django admin: how to sort by one of the custom list_display fields that has no database field
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edited Apr 21 '16 at 22:52
charleschenster
23233 silver badges88 bronze badges
answered S...
Java 8 Stream and operation on arrays
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297
There are new methods added to java.util.Arrays to convert an array into a Java 8 stream which...
Why was the arguments.callee.caller property deprecated in JavaScript?
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Early versions of JavaScript did not allow named function expressions, and because of that we ...
Two sets of parentheses after function call
...as looking how filters works in Angularjs and I saw that we need to send 2 sets of parentheses.
3 Answers
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Temporarily disable some plugins using pathogen in vim.
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The easiest method to disable a plugin when you use Pathogen is by adding it's bundle name to t...
Unable to access JSON property with “-” dash
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jsonObj.profile-id is a subtraction expression (i.e. jsonObj.profile - id).
To access a key t...