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Find the extension of a filename in Ruby

I'm working on the file upload portion of a Rails app. Different types of files are handled differently by the app. 4 Answ...
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Sourcemaps off by one line in Chrome, with Ruby on Rails, Webpack, and React JS

I'm having an issue where the sourcemaps generated by Webpack using the inline-source-map configuration setting are off by one line when I use the Chrome devtools debugger. Webpack is set up inside a Ruby on Rails application to generate a concatenated, unminified JavaScript file composed of a cou...
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What is the difference between t.belongs_to and t.references in rails?

What is the difference between t.references and t.belongs_to ? Why are we having those two different words? It seems to me they do the same thing? Tried some Google search, but find no explanation. ...
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Why is '+' not understood by Python sets?

I would like to know why this is valid: 6 Answers 6 ...
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What's the best way of structuring data on firebase?

I am new to firebase and I want to know what's the best way of structuring data on it. 3 Answers ...
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Setting focus on an HTML input box on page load

I'm trying to set the default focus on an input box when the page loads (example: google). My page is very simple, yet I can't figure out how to do this. ...
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List files in local git repo?

I'm using Sparkleshare, which uses Git to sync files between my laptop and my backup server. 3 Answers ...
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mysql query order by multiple items

is is possible to order by multiple rows? 3 Answers 3 ...
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TypeError: Cannot read property 'then' of undefined

Above function return a string like "failed". However, when I try to run then function on it, it will return error of 2 Ans...
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MySql - Way to update portion of a string?

I'm looking for a way to update just a portion of a string via MySQL query. 4 Answers ...