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How best to determine if an argument is not sent to the JavaScript function

... if an argument has been passed to a JavaScript function. I'm wondering if one method is better than the other or if one is just bad to use? ...
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Putting a simple if-then-else statement on one line [duplicate]

...ere an easier way of writing an if - then - else statement so it fits on one line? 5 Answers ...
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Input placeholders for Internet Explorer

... "Web Forms : input placeholder" section of HTML5 Cross Browser Polyfills, one I saw was jQuery-html5-placeholder. I tried the demo out with IE9, and it looks like it wraps your <input> with a span and overlays a label with the placeholder text. <label>Text: <span style="position:...
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Python vs Bash - In which kind of tasks each one outruns the other performance-wise? [closed]

... complex. Shells provide an infrastructure that lets us use pre-built components that are linked together at run time rather than compile time. Those components are free-standing programs in their own right that can be used alone or in other combinations without recompiling. The syntax for calling ...
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What is an ORM, how does it work, and how should I use one? [closed]

Someone suggested I use an ORM for a project that I'm designing, but I'm having trouble finding information on what it is or how it works. ...
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Rake just one migration

I'm trying to run just one migration out of a whole bunch in my rails app. How can I do this? I don't want to run any of the migrations before or after it. Thanks. ...
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How can I add a box-shadow on one side of an element?

...e way I do it is to wrap the inner element with box-shadow into an outer one with padding-right and overflow:hidden; so the three other sides of the shadow are not visible. ...
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Regular vs Context Free Grammars

I'm studying for my computing languages test, and there's one idea I'm having problems wrapping my head around. 8 Answe...
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What's the best way to model recurring events in a calendar application?

...up with to handle these events seem like a hack. I can limit how far ahead one can look, and then generate all the events at once. Or I can store the events as repeating and dynamically display them when one looks ahead on the calendar, but I'll have to convert them to a normal event if someone want...
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Abusing the algebra of algebraic data types - why does this work?

...lgebraic' expression for algebraic data types looks very suggestive to someone with a background in mathematics. Let me try to explain what I mean. ...