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http HEAD vs GET performance

...as a record in a database or a file on the filesystem. Unless the resource is large or is slow to retrieve at the server, you might not see a measurable gain by using HEAD instead of GET. It could be that retrieving the meta data is not any faster than retrieving the entire resource. You could impl...
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Is well formed without a ?

Is it valid to have <input> without it being in a <form> ? 7 Answers 7 ...
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Can you explain the HttpURLConnection connection process?

...ntiate the HttpURLConnection with the URL object - A new // connection is opened every time by calling the openConnection // method of the protocol handler for this URL. // 1. This is the point where the connection is opened. HttpURLConnection connection = (HttpURLConnection) url ...
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Efficient way to rotate a list in python

What is the most efficient way to rotate a list in python? Right now I have something like this: 26 Answers ...
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What is the difference between __init__ and __call__?

... The first is used to initialise newly created object, and receives arguments used to do that: class Foo: def __init__(self, a, b, c): # ... x = Foo(1, 2, 3) # __init__ The second implements function call operator. class F...
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Check if UIColor is dark or bright?

I need to determine whether a selected UIColor (picked by the user) is dark or bright, so I can change the color of a line of text that sits on top of that color, for better readability. ...
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How to check if type of a variable is string?

Is there a way to check if the type of a variable in python is a string , like: 20 Answers ...
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How to test if a string is basically an integer in quotes using Ruby

I need a function, is_an_integer , where 20 Answers 20 ...
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How to perform a mysqldump without a password prompt?

... Since you are using Ubuntu, all you need to do is just to add a file in your home directory and it will disable the mysqldump password prompting. This is done by creating the file ~/.my.cnf (permissions need to be 600). Add this to the .my.cnf file [mysqldump] user=mysq...
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What's an appropriate HTTP status code to return by a REST API service for a validation failure?

...01 Unauthorized whenever I encounter a validation failure in my Django / Piston based REST API application. Having had a look at the HTTP Status Code Registry I'm not convinced that this is an appropriate code for a validation failure, what do y'all recommend? ...