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Uniq by object attribute in Ruby

... Do it on the database level: YourModel.find(:all, :group => "status") share | improve this answer | follow | ...
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How can I get a user's media from Instagram without authenticating as a user?

...1/users/<user-id>/media/recent/ (at present time of writing) you actually do not need OAuth access token. You can perform https://api.instagram.com/v1/users/[USER ID]/media/recent/?client_id=[CLIENT ID] [CLIENT ID] would be valid client id registered in app through manage clients (not relate...
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Create new user in MySQL and give it full access to one database

...r'@'hostname'; Try this to give it access to the database dbTest: GRANT ALL PRIVILEGES ON dbTest.* To 'user'@'hostname' IDENTIFIED BY 'password'; If you are running the code/site accessing MySQL on the same machine, hostname would be localhost. Now, the break down. GRANT - This is the command...
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Generating random numbers in Objective-C

...te the S-Boxes via arc4random_addrandom(). There is no need to call arc4random_stir() before using arc4random(), since arc4random() automatically initializes itself. EXAMPLES The following produces a drop-in replacement for the traditional rand() and random() functions using ...
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How can you do anything useful without mutable state?

...me, there are tons of state variables, beginning with the positions of all the characters, who tend to move around constantly. How can you possibly do anything useful without keeping track of changing values? If you're interested, here's a series of articles which describe game program...
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UNIX export command [closed]

... Unix The commands env, set, and printenv display all environment variables and their values. env and set are also used to set environment variables and are often incorporated directly into the shell. printenv can also be used to print a single variable by giving that variab...
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Stash only one file out of multiple files that have changed with Git?

...ot stash this hunk or any of the remaining ones a - stash this hunk and all later hunks in the file d - do not stash this hunk or any of the later hunks in the file g - select a hunk to go to / - search for a hunk matching the given regex j - leave this hunk undecided, see next undeci...
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Clone() vs Copy constructor- which is recommended in java [duplicate]

...rclass since the Beta-release days of the Java compiler*; and it, like all ancient magic, requires the appropriate incantation to prevent the spell from unexpectedly backfiring Prefer a method that copies the object Foo copyFoo (Foo foo){ Foo f = new Foo(); //for all properties in F...
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How to version REST URIs

...resource is returning some variant of application/vnd.yourcompany.user+xml all you need to do is create support for a new application/vnd.yourcompany.userV2+xml media type and through the magic of content negotiation your v1 and v2 clients can co-exist peacefully. In a RESTful interface, the closes...
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Why is using “for…in” for array iteration a bad idea?

...undefined undefined undefined 5 */ can sometimes be totally different from the other: var a = []; a[5] = 5; for (var x in a) { // Shows only the explicitly set index of "5", and ignores 0-4 console.log(x); } /* Will display: 5 */ Also consider tha...