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How can I merge properties of two JavaScript objects dynamically?

I need to be able to merge two (very simple) JavaScript objects at runtime. For example I'd like to: 63 Answers ...
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How to tell if rails is in production?

...rver -e production to start rails in production mode. It did and I got no errors. However how do I tell if it is in production mode? I tried a non-existent route, and I got a similar error page I did in development. ...
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Why should we typedef a struct so often in C?

...ype name. Given the definition above, declarations such as s x; /* error in C */ s *p; /* error in C */ are errors in C. You must write them as struct s x; /* OK */ struct s *p; /* OK */ The names of unions and enumerations are also tags rather than types. In C...
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How to run a hello.js file in Node.js on windows?

...le is sitting. Also added path point to the folder c:\abc\zyx\ and I get error – Mitul Jul 18 '11 at 19:16 What is t...
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Why are we not to throw these exceptions?

...part makes little sense to me. Sure, you should rather avoid causing these errors to begin with, but when you e.g. write an IList implementation, it's not in your power to affect the indices requested, it's the caller's logic mistake when an index is invalid, and you are can only inform them of this...
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List of special characters for SQL LIKE clause

What is the complete list of all special characters for a SQL (I'm interested in SQL Server but other's would be good too) LIKE clause? ...
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How to test if a string is JSON or not?

...ll, and the server will return either a JSON string with useful data or an error message string produced by the PHP function mysql_error() . How can I test whether this data is a JSON string or the error message. ...
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How to define static property in TypeScript interface

...() {} } Refer to my comment at github issue 13462. visual result: Compile error with a hint of static method missing. After static method implemented, hint for method missing. Compilation passed after both static interface and normal interface fulfilled. ...
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How to write an async method with out parameter?

...dConnectRequest request) { return (true, BadRequest(new OpenIdErrorResponse { Error = OpenIdConnectConstants.Errors.AccessDenied, ErrorDescription = "Access token provided is not valid." })); } return result utilizes the method signature def...
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Multiple left-hand assignment with JavaScript

... Thanks, this definitely helps. It helps to think in terms of what errors would be thrown if it were evaluated other than right-to-left (in this case, the error would be that var1/var2 are undefined). – David Calhoun Nov 19 '09 at 3:48 ...