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Objective-C: difference between id and void *
...tructures, this can be a critical difference. Declaring iVars like void *_superPrivateDoNotTouch; will cause premature reaping of objects if _superPrivateDoNotTouch is actually an object. Don't do that.
attempting to invoke a method on a reference of void * type will barf up a compiler warning.
a...
How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
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OLD only use a reference
Dependencies
uses express, socket.io, node_redis and last but not least the sample code from media fire.
Install node.js+npm(as non root)
First you should(if you have not done this yet) install node.js+npm in 30 seconds (the right way because you should NOT run npm...
Convert a char to upper case using regular expressions (EditPad Pro)
...it's find and replace dialog. Just search for " [a-z]" and replace it by " _0.toUpperCase()" (without quotes)
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How can I detect if a browser is blocking a popup?
...f code from our JS library.
openPopUp: function(urlToOpen) {
var popup_window=window.open(urlToOpen,"myWindow","toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=yes, copyhistory=yes, width=400, height=400");
try {
popup_window.foc...
Hidden features of Scala
... more. Every Regex object in Scala has an extractor (see answer from oxbox_lakes above) that gives you access to the match groups. So you can do something like:
// Regex to split a date in the format Y/M/D.
val regex = "(\\d+)/(\\d+)/(\\d+)".r
val regex(year, month, day) = "2010/1/13"
The secon...
How to install a specific version of a ruby gem?
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@abbood rake _10.1.1_ ... should work, for whoever wants to know :)
– Koen.
Jan 29 '17 at 10:00
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What is the best method of handling currency/money?
...igits
# scale is the number of digits to the right of the decimal point
add_column :items, :price, :decimal, :precision => 8, :scale => 2
In Rails, the :decimal type is returned as BigDecimal, which is great for price calculation.
If you insist on using integers, you will have to manually c...
PHP prepend associative array with literal keys?
...epend an associative array with literal key=>value pairs? I know that array_unshift() works with numerical keys, but I'm hoping for something that will work with literal keys.
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Compelling examples of custom C++ allocators?
...nging a single
std::vector<T>
to
std::vector<T,tbb::scalable_allocator<T> >
(this is a quick and convenient way of switching the allocator to use TBB's nifty thread-private heaps; see page 7 in this document)
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Windows 7 SDK installation failure
...\AppData\Local\Temp\ or %temp%. The log file is most likely called SDKSetup_7.xxxxx.log.
Solution: Uninstall any existing Visual C++ 2010 redistributable.
I just had this problem, and I looked at the solution at Ctrl+F5, Fix Problem Installing Windows SDK for Windows 7, but it didn't work.
I goo...