Zack Xu

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Zack Xu has asked 36 questions and find answers to 28 problems.

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Zack Xu questions

How do I add or modify the Content-Disposition of an existing object in Amazon S3?
Use parentheses to enclose a block in Ruby?
Is it possible to find a document in mongodb using object id alone (without knowing which collection)?
What's the Rails.root equivalent in a Rack application?
how to add annotation text to a Highcharts chart?
Can you define instance variables during Cucumber's Given, When, and Then step definitions
In Sublime, typing <tab> after colon causes 'key => "value"' to appear, why?
Gmail thinks our email is NOT from the FROM domain and puts it in Spam Folder, how to solve this?
How is a local variable created even when IF condition evaluates to false in Ruby? [duplicate]
How to jump to source code of a method in Sublime Text with key binding?

Zack Xu answers

How do I add or modify the Content-Disposition of an existing object in Amazon S3?
In CKEditor, how to set link open in a new window as default while removing the target tab?
Check if file is a valid image
How to add active record validation errors inside custom setter?
Proper way to prevent ActiveRecord::ReadOnlyRecord?
What's the Rails.root equivalent in a Rack application?
Subtracting one Array from another in Ruby
Error while installing rails
cap deploy:setup creates the release folder with root as owner
Rails / Papertrail: Changeset with association changes