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How to check if a table contains an element in Lua?

...r function is as efficient as can be done. Of course, as noted by others (and as practiced in languages older than Lua), the solution to your real problem is to change representation. When you have tables and you want sets, you turn tables into sets by using the set element as the key and true as ...
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Why is the apt-get function not working in the terminal on Mac OS X v10.9 (Mavericks)?

I was watching this , and, as you can see, the first command I am told to put in is: 5 Answers ...
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Do I need to store the salt with bcrypt?

...ng characters represented the hash value. The checker function knows this, and pulls the hash apart to get the salt back out. share | improve this answer | follow ...
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How to apply a style to an embedded SVG?

...t the stylesheet into the svg document using script. Something like this, and note that this code assumes that the <object> has loaded fully: var svgDoc = yourObjectElement.contentDocument; var styleElement = svgDoc.createElementNS("http://www.w3.org/2000/svg", "style"); styleElement.textCon...
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Contain form within a bootstrap popover?

... I would put my form into the markup and not into some data tag. This is how it could work: JS Code: $('#popover').popover({ html : true, title: function() { return $("#popover-head").html(); }, content: function() { return $("#pop...
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Does a dot have to be escaped in a character class (square brackets) of a regular expression?

...r except ^, -, ] or \ is a literal. This website is a brilliant reference and has lots of info on the nuances of different regex flavours. http://www.regular-expressions.info/refcharclass.html share | ...
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How to stop an app on Heroku?

... users. However, I notice there are some data issues which i'd like to fix and stop the app in the mean time so users don't enter anything new. ...
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Is it possible to center text in select box?

... I'm afraid this isn't possible with plain CSS, and won't be possible to make completely cross-browser compatible. However, using a jQuery plugin, you could style the dropdown: https://www.filamentgroup.com/lab/jquery-ui-selectmenu-an-aria-accessible-plugin-for-styling-a...
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background-size in shorthand background property (CSS3)

I'm trying to mix background-image and background-size properties in a shorthanded background property. Based on W3C documentation background-size should come after background-position property separated with an slash( / ). ...
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WPF: How to programmatically remove focus from a TextBox

...learFocus() on a TextBox inside a modal Window, it causes both the TextBox and the Window to lose focus. Meaning KeyDown events no longer go to the Window. By instead changing it so the Focus changes to a parent (which may be the Window), the future KeyDown events are not lost. In my practical ex...