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Definition of “downstream” and “upstream”

...ry. Information flowed "downstream" to you. When you make changes, you usually want to send them back "upstream" so they make it into that repository so that everyone pulling from the same source is working with all the same changes. This is mostly a social issue of how everyone can coordinate thei...
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How does the Amazon Recommendation feature work?

...nce. Typical fields of study revolve around market basket analysis (also called affinity analysis) which is a subset of the field of data mining. Typical components in such a system include identification of primary driver items and the identification of affinity items (accessory upsell, cross sel...
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Delete with Join in MySQL

... Actually you can use an alias for joined tables, but not for the main table (posts). "DELETE posts FROM posts INNER JOIN projects p ON p.project_id = posts.project_id" – Weboide May 29 '12 a...
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MVC 5 Seed Users and Roles

...d, "AppAdmin"); } } I used package-manager "update-database". DB and all tables were created and seeded with data. share | improve this answer | follow |...
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cocoapods - 'pod install' takes forever

I was trying to update the existing pods with pod install command, but it takes forever to run. 19 Answers ...
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How to add elements of a Java8 stream into an existing List

...ting collection. The reason is that collectors are designed to support parallelism, even over collections that aren't thread-safe. The way they do this is to have each thread operate independently on its own collection of intermediate results. The way each thread gets its own collection is to call ...
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EditText, clear focus on touch outside

...ss I could set up OnTouchListener 's on the other views in layout and manually clear the EditText 's focus. But seems too hackish... ...
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Gitignore not working

...anged before you do this.) git rm -rf --cached . git add . This removes all files from the repository and adds them back (this time respecting the rules in your .gitignore). share | improve this...
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Advantages of using prototype, vs defining methods straight in the constructor? [duplicate]

... Methods that inherit via the prototype chain can be changed universally for all instances, for example: function Class () {} Class.prototype.calc = function (a, b) { return a + b; } // Create 2 instances: var ins1 = new Class(), ins2 = new Class(); // Test the calc method: console...
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What is the difference between std::array and std::vector? When do you use one over other? [duplicat

...ssic C array. That means its size is fixed at compile time and it will be allocated as a single chunk (e.g. taking space on the stack). The advantage it has is slightly better performance because there is no indirection between the object and the arrayed data. std::vector is a small class contain...