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How to use concerns in Rails 4
The default Rails 4 project generator now creates the directory "concerns" under controllers and models. I have found some explanations about how to use routing concerns, but nothing about controllers or models.
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What is the difference between NTFS Junction Points and Symbolic Links?
At a high level, the only obvious difference between NTFS Junction Points and Symbolic Links is that Junctions are only able to be directories, while SymLinks are allowed to also target files.
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Are duplicate keys allowed in the definition of binary search trees?
I'm trying to find the definition of a binary search tree and I keep finding different definitions everywhere.
12 Answers
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How to sign an android apk file
I am trying to sign my apk file. I can't figure out how to do it. I can't find good in-depth directions. I have very little programing experience, so any help would be appreciated.
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Iterator Loop vs index loop [duplicate]
I'm reviewing my knowledge on C++ and I've stumbled upon iterators. One thing I want to know is what makes them so special and I want to know why this:
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django admin - add custom form fields that are not part of the model
I have a model registered in the admin site. One of its fields is a long string expression. I'd like to add custom form fields to the add/update page of this model in the admin that based on these fields values I will build the long string expression and save it in the relevant model field.
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Using node.js as a simple web server
I want to run a very simple HTTP server. Every GET request to example.com should get index.html served to it but as a regular HTML page (i.e., same experience as when you read normal web pages).
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How do I create a nice-looking DMG for Mac OS X using command-line tools?
I need to create a nice installer for a Mac application. I want it to be a disk image (DMG), with a predefined size, layout and background image.
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Abort makefile if variable not set
How could I abort a make/makefile execution based on a makefile's variable not being set/valued?
5 Answers
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Payment Processors - What do I need to know if I want to accept credit cards on my website? [closed]
This question talks about different payment processors and what they cost, but I'm looking for the answer to what do I need to do if I want to accept credit card payments?
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