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Why JSF saves the state of UI components on server?

...the state of UI components on the server side ? Because HTTP is stateless and JSF is stateful. The JSF component tree is subject to dynamic (programmatic) changes. JSF simply needs to know the exact state as it was when the form had been displayed to the enduser, so that it can successfully process...
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Difference between .on('click') vs .click()

...s. I would prefer .on over .click because the former can use less memory and work for dynamically added elements. Consider the following html: <html> <button id="add">Add new</button> <div id="container"> <button class="alert">alert!</button> ...
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Choice between vector::resize() and vector::reserve()

... The two functions do vastly different things! The resize() method (and passing argument to constructor is equivalent to that) will insert or delete appropriate number of elements to the vector to make it given size (it has optional second argument to specify their value). It will affect the ...
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Sorting a vector of custom objects

...ting a vector containing custom (i.e. user defined) objects. Probably, standard STL algorithm sort along with a predicate (a function or a function object) which would operate on one of the fields (as a key for sorting) in the custom object should be used. Am I on the right track? ...
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What is an NP-complete in computer science?

... NP stands for Non-deterministic Polynomial time. This means that the problem can be solved in Polynomial time using a Non-deterministic Turing machine (like a regular Turing machine but also including a non-deterministic "choice"...
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Can not connect to local PostgreSQL

...really looks like a file permissions error. Unix domain sockets are files and have user permissions just like any other. It looks as though the OSX user attempting to access the database does not have file permissions to access the socket file. To confirm this I've done some tests on Ubuntu and p...
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Convert Java Array to Iterable

... 2nd and 3rd lines are options i would say :) – fmucar Apr 26 '12 at 15:37 1 ...
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Easiest way to activate PHP and MySQL on Mac OS 10.6 (Snow Leopard), 10.7 (Lion), 10.8 (Mountain Lio

What is the easiest way to activate PHP and MySQL on Mac OS 10.6 (Snow Leopard), 10.7 (Lion), 10.8 (Mountain Lion)? 12 Answ...
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What is WEB-INF used for in a Java EE web application?

...he WEB-INF directory are visible to servlet code using the getResource and getResourceAsStream method calls on the ServletContext, and may be exposed using the RequestDispatcher calls. This means that WEB-INF resources are accessible to the resource loader of your Web-Application and not dir...
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How to save MySQL query output to excel or .txt file? [duplicate]

...ll be enclosed in double quotes, the fields will be separated by commas, and each row will be output on a new line separated by a newline (\n). Sample output of this command would look like: "1","Tech-Recipes sock puppet","14.95" "2","Tech-Recipes chef's hat","18.95" Keep in mind that t...