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How to check if a specific key is present in a hash or not?

... edited Jun 12 '17 at 19:44 Andre Figueiredo 10k66 gold badges3939 silver badges6767 bronze badges answered Aug 21 '13 at 13:09 ...
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Get a list of all git commits, including the 'lost' ones

...ference between a commit deliberately orphaned by commit --amend or rebase and one accidentally orphaned by working with a detached HEAD, say. – Cascabel Jan 24 '11 at 21:22 3 ...
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What REST PUT/POST/DELETE calls should return by a convention?

...n RFC7231 describes exactly what behaviour is expected from GET, PUT, POST and DELETE. Update (Jul 3 '14): The HTTP spec intentionally does not define what is returned from POST or DELETE. The spec only defines what needs to be defined. The rest is left up to the implementer to choose. ...
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Map a network drive to be used by a service

Suppose some Windows service uses code that wants mapped network drives and no UNC paths. How can I make the drive mapping available to the service's session when the service is started? Logging in as the service user and creating a persistent mapping will not establish the mapping in the context of...
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JPA getSingleResult() or null

... doesn't exist or update it if it does. To enable this, I have to findByIdAndForeignKey , if it returned null insert if not then update. The problem is how do I check if it exists? So I tried getSingleResult . But it throws an exception if the ...
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How to get notified about changes of the history via history.pushState?

...ired when you use pushState. But an event such as pushstate would come in handy. Because history is a host object, you should be careful with it, but Firefox seems to be nice in this case. This code works just fine: (function(history){ var pushState = history.pushState; history.pushState = ...
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Concatenating two std::vectors

... I'd only add code to first get the number of elements each vector holds, and set vector1 to be the one holding the greatest. Should you do otherwise you're doing a lot of unnecessary copying. – Joe Pineda Oct 14 '08 at 16:11 ...
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Set value for particular cell in pandas DataFrame using index

I've created a Pandas DataFrame 20 Answers 20 ...
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How to get GET (query string) variables in Express.js on Node.js?

... In Express it's already done for you and you can simply use req.query for that: var id = req.query.id; // $_GET["id"] Otherwise, in NodeJS, you can access req.url and the builtin url module to url.parse it manually: var url = require('url'); var url_parts = url...
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Ruby on Rails generates model field:type - what are the options for field:type?

I'm trying to generate a new model and forget the syntax for referencing another model's ID. I'd look it up myself, but I haven't figured out, among all my Ruby on Rails documentation links, how to find the definitive source. ...