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What is the difference between Gemfile and Gemfile.lock in Ruby on Rails
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The Gemfile is where you specify which gems you want to use, and lets you specify which versio...
How to redirect both stdout and stderr to a file [duplicate]
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If you want to log to the same file:
command1 >> log_file 2>&1
If you want different files:
command1 >> log_file 2>> err_file
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jQuery how to find an element based on a data-attribute value?
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You have to inject the value of current into an Attribute Equals selector:
$("ul").find(`[da...
How to handle exceptions in a list comprehensions?
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There is no built-in expression in Python that lets you ignore an exception (or return alterna...
How to undo “git commit --amend” done instead of “git commit”
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Why start an ArrayList with an initial capacity?
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Ternary operator in AngularJS templates
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Update: Angular 1.1.5 added a ternary operator, so now we can simply write
<li ng-class="$first ? 'firstRow' : 'nonFirstRow'">
If you are using an earlier version of Angular, your two choices are:
(condition && result_if...
What's the most efficient way to test two integer ranges for overlap?
Given two inclusive integer ranges [x1:x2] and [y1:y2], where x1 ≤ x2 and y1 ≤ y2, what is the most efficient way to test whether there is any overlap of the two ranges?
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Determine if a function exists in bash
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