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What makes Scala's operator overloading “good”, but C++'s “bad”?
Operator overloading in C++ is considered by many to be A Bad Thing(tm), and a mistake not to be repeated in newer languages. Certainly, it was one feature specifically dropped when designing Java.
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What's the difference between using CGFloat and float?
...t, including the kernel and user applications. Apple's 64-bit Transition Guide for Cocoa is a useful resource.
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What's wrong with using $_REQUEST[]?
...bined way. In fact that's what you almost always want to do:
for a plain idempotent request usually submitted via GET, there's the possibility the amount of data you want won't fit in a URL so it has be mutated to a POST request instead as a practical matter.
for a request that has a real effect, ...
Is there a way to word-wrap long words in a div?
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Most of the previous answer didn't work for me in Firefox 38.0.5. This did...
<div style='padding: 3px; width: 130px; word-break: break-all; word-wrap: break-word;'>
// Content goes here
</div>
Documentation:
word-break
word-wrap
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Fixed point vs Floating point number
...read definitions about them all over Google. But none that I have read provide a simple enough explanation of what they really are. Can I get a plain definition with example?
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How to write a cron that will run a script every day at midnight?
...ng like this:
00 00 * * * ruby path/to/your/script.rb
(00 00 indicates midnight--0 minutes and 0 hours--and the *s mean every day of every month.)
Syntax:
mm hh dd mt wd command
mm minute 0-59
hh hour 0-23
dd day of month 1-31
mt month 1-12
wd day of week 0-7 (Sunday = 0 or 7)
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Why does this (null || !TryParse) conditional result in “use of unassigned local variable”?
...aded true operator.
The || operator will invoke the true operator to decide whether to evaluate the right-hand side, and then the if statement will invoke the true operator to decide whether to evaluate the its body. For a normal bool, these will always return the same result and so exactly one ...
Infinite scrolling with React JS
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Basically when scrolling you want to decide which elements are visible and then rerender to display only those elements, with a single spacer element on top and bottom to represent the offscreen elements.
Vjeux made a fiddle here which you can look at: jsfiddle.
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What's the difference between Invoke() and BeginInvoke()
...ple, if you have a Person with FirstName and LastName properties, and you did:
person.FirstName = "Kevin"; // person is a shared reference
person.LastName = "Spacey";
control.BeginInvoke(UpdateName);
person.FirstName = "Keyser";
person.LastName = "Soze";
Then the UI may well end up displaying "Ke...
Will HTML5 allow web apps to make peer-to-peer HTTP connections?
... of concept in a WebKit build that does HTML5 Peer to Peer Conversational Video.
They have demonstrations in their blog of the technology in action, as well as diagrams and explanations on how the technology will work.
They are working on getting this stabilized and committed to the WebKit repos...