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Rails: Missing host to link to! Please provide :host parameter or set default_url_options[:host]

... 15 Answers 15 Active ...
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How to compile without warnings being treated as errors?

... answered Jul 19 '12 at 12:52 Daniel FischerDaniel Fischer 172k1515 gold badges286286 silver badges416416 bronze badges ...
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How to append something to an array?

... then you can use Array.prototype.unshift for this purpose. var arr = [1, 2, 3]; arr.unshift(0); console.log(arr); It also supports appending multiple values at once just like push. Update Another way with ES6 syntax is to return a new array with the spread syntax. This leaves the origina...
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Sending a JSON to server and retrieving a JSON in return, without JQuery

... } }; var data = JSON.stringify({"email": "hey@mail.com", "password": "101010"}); xhr.send(data); Sending and receiving data in JSON format using GET method // Sending a receiving data in JSON format using GET method // var xhr = new XMLHttpRequest(); var url = "url?data=" + encodeURICo...
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Entity framework code-first null foreign key

... 169 You must make your foreign key nullable: public class User { public int Id { get; set; } ...
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Most lightweight way to create a random string and a random hexadecimal number

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Is there an equivalent of lsusb for OS X

... 136 I got tired of forgetting the system_profiler SPUSBDataType syntax, so I made an lsusb alterna...
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Include all existing fields and add new fields to document

... 171 In 4.2+, you can use the $set aggregation pipeline operator which is nothing other than an ali...
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Should I learn C before learning C++? [closed]

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Is there a way to word-wrap long words in a div?

... 314 Reading the original comment, rutherford is looking for a cross-browser way to wrap unbroken te...