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What is the most efficient way to create HTML elements using jQuery?

Recently I've been doing a lot of modal window pop-ups and what not, for which I used jQuery. The method that I used to create the new elements on the page has overwhelmingly been along the lines of: ...
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John Carmack's Unusual Fast Inverse Square Root (Quake III)

John Carmack has a special function in the Quake III source code which calculates the inverse square root of a float, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why t...
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Show or hide element in React

I am messing around with React.js for the first time and cannot find a way to show or hide something on a page via click event. I am not loading any other library to the page, so I am looking for some native way using the React library. This is what I have so far. I would like to show the results...
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Can jQuery provide the tag name?

...ich have the same class - but they're different element types. I want to find out the tag name of the element as I loop over them - but .attr doesn't take "tag" or "tagname". ...
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Android - Handle “Enter” in an EditText

I am wondering if there is a way to handle the user pressing Enter while typing in an EditText , something like the onSubmit HTML event. ...
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Why does Sql Server keep executing after raiserror when xact_abort is on?

I just got surprised by something in TSQL. I thought that if xact_abort was on, calling something like 4 Answers ...
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How can I get the length of text entered in a textbox using jQuery?

How can I get the length of text entered in a textbox using jQuery? 6 Answers 6 ...
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Why do some websites add “Slugs” to the end of URLs? [closed]

Many websites, including this one, add what are apparently called slugs - descriptive but as far as I can tell useless bits of text - to the end of URLs. ...
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ASP.NET MVC Html.ValidationSummary(true) does not display model errors

...oblem with Html.ValidationSummary. I don't want to display property errors in ValidationSummary. And when I set Html.ValidationSummary(true) it does not display error messages from ModelState. When there is some Exception in controller action on string ...
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Mysql: Select rows from a table that are not in another

How to select all rows in one table that do not appear on another? 8 Answers 8 ...