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HTML5 LocalStorage: Checking if a key exists [duplicate]

... { // } Another way, relevant when value is not expected to be empty string, null or any other falsy value: if (localStorage["username"]) { // } share | improve this answer | ...
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How to insert a new line in Linux shell script? [duplicate]

...3] The  printf command may accept arguments and needs a format control string similar (but not exactly the same) to the one for the standard C printf(3) function... share | improve this answer ...
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How do I get the entity that represents the current user in Symfony2?

...ct! You don't need to query it again. Find out the way to set up your providers in security.yml from Sf2 Documentation and try again. Best luck! share | improve this answer | ...
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HTTP 401 - what's an appropriate WWW-Authenticate header value?

...mainder is very much dependent on that scheme. In this case realm just provides the browser a literal that can be displayed to the user when prompting for the user id and password. You're obviously not using Basic however since there is no point having session expiry when Basic Auth is used. I assu...
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What's the best way to parse a JSON response from the requests library?

...sts.get(...) json_data = json.loads(response.text) This converts a given string into a dictionary which allows you to access your JSON data easily within your code. Or you can use @Martijn's helpful suggestion, and the higher voted answer, response.json(). ...
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How to declare a global variable in JavaScript?

...u have to generate global variables in production code (which should be avoided) always declare them explicitly: window.globalVar = "This is global!"; While it is possible to define a global variable by just omitting var (assuming there is no local variable of the same name), doing so generates a...
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Include an SVG (hosted on GitHub) in MarkDown

...things break in the browser. When this question was asked (in 2012) SVGs didn't work. Since then Github has implemented various improvements. Now (at least for SVG), the correct Content-Type headers are sent. Examples All of the ways stated below will work. I copied the SVG image from the questi...
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Array Length in Java

...erty. It is as A.length, do not use A.length() its mainly used for size of string related objects. The length property will always show the total allocated space to the array during initialization. If you ever have any of these kind of problems the simple way is to run it. Happy Programming! ...
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Prevent wrapping of span or div

I'd like to put a group of div elements of fixed width into a container and have the horizontal scroll bar appeared. The div / span elements should appear in a line, left to right in the order they appear in the HTML (essentially unwrapped). ...
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.NET 4.0 build issues on CI server

... http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=6b6c21d2-2006-4afa-9702-529fa782d63b share | improve this answer | follow | ...