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Uniq by object attribute in Ruby

What's the most elegant way to select out objects in an array that are unique with respect to one or more attributes? 14 An...
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What's the fastest way to do a bulk insert into Postgres?

...200, 300]), UNNEST(ARRAY['a', 'b', 'c']) ); without VALUES using subselect with additional existance check: INSERT INTO tablename (fieldname1, fieldname2, fieldname3) SELECT * FROM ( SELECT UNNEST(ARRAY[1, 2, 3]), UNNEST(ARRAY[100, 200, 300]), UNNEST(ARRAY['a', 'b...
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Can you organize imports for an entire project in eclipse with a keystroke?

... Select the project in the package explorer and press Ctrl + Shift + O (same keystroke as the single class version). Should work for packages, etc. s...
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html select only one checkbox in a group

So how can I only allow a user to select only one checkbox? 16 Answers 16 ...
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Xcode 4, Core Data Model Version - Set Current Version

...d "View" button at the top right of the window). In the Utilities sidepane select the File inspector (little paper icon on the top left) You will see "Versioned Core Data Model" as a group so just change the "Current" drop-down to your new version. ...
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In MySQL, can I copy one row to insert into the same table?

...e) but I want to do this without having to list all the columns after the "select", because this table has too many columns. ...
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Android studio add external project to build.gradle

...ick module -> Open Module Settings -> Dependencies -> + (bottom), select Module Dependency, select your library from the list, click ok :) – T.Coutlakis Jan 11 '15 at 22:51 ...
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CSS3 selector :first-of-type with class name?

Is it possible to use the CSS3 selector :first-of-type to select the first element with a given class name? I haven't been successful with my test so I'm thinking it's not? ...
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When to use Vanilla JavaScript vs. jQuery?

...now) this.value (on most input types. only issues I know are IE when a <select> doesn't have value properties set on its <option> elements, or radio inputs in Safari.) this.className to get or set an entire "class" property this.selectedIndex against a <select> to get the selected ...
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How to pick an image from gallery (SD Card) for my app?

...EQ_CODE_PICK_IMAGE: if(resultCode == RESULT_OK){ Uri selectedImage = imageReturnedIntent.getData(); String[] filePathColumn = {MediaStore.Images.Media.DATA}; Cursor cursor = getContentResolver().query( selectedImage, fileP...