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Objective-C pass block as parameter
...pes are, but replacing the * with a ^. One way to pass a block to a method is as follows:
- (void)iterateWidgets:(void (^)(id, int))iteratorBlock;
But as you can see, that's messy. You can instead use a typedef to make block types cleaner:
typedef void (^ IteratorBlock)(id, int);
And then pass...
jQuery textbox change event doesn't fire until textbox loses focus?
...
Binding to both events is the typical way to do it. You can also bind to the paste event.
You can bind to multiple events like this:
$("#textbox").on('change keyup paste', function() {
console.log('I am pretty sure the text box changed');
});...
HSL to RGB color conversion
...
Garry Tan posted a Javascript solution on his blog (which he attributes to a now defunct mjijackson.com, but is archived here and the original author has a gist - thanks to user2441511).
The code is re-posted below:
HSL to RGB:
/**
* Converts an HSL color value t...
What is @RenderSection in asp.net MVC
What is the purpose of @RenderSection and how does it function? I understand what bundles do, but I have yet to figure out what this does and it's probably important.
...
How to add 'ON DELETE CASCADE' in ALTER TABLE statement
...
You can not add ON DELETE CASCADE to an already existing constraint. You will have to drop and re-create the constraint. The documentation shows that the MODIFY CONSTRAINT clause can only modify the state of a constraint (i-e: ENABLED/DISABLED...).
...
how to change an element type using jquery
...).replaceWith(function () {
return $("<h1 />", attrs).append($(this).contents());
});
Example: http://jsfiddle.net/yapHk/
Update, here's a plugin:
(function($) {
$.fn.changeElementType = function(newType) {
var attrs = {};
$.each(this[0].attributes, function(idx, a...
What does the Subversion status symbol “~” mean?
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The SVN Book says:
Item is versioned as one kind of object (file, directory, link), but has been replaced by different kind of object.
So perhaps it was originally a single file, but you changed it to a directory, or something along those lines?
...
Naming threads and thread-pools of ExecutorService
...ng new threads
New threads are created using a ThreadFactory. If not otherwise specified, a Executors.defaultThreadFactory() is used, that creates threads to all be in the same ThreadGroup and with the same NORM_PRIORITY priority and non-daemon status. By supplying a different ThreadFactory, you can...
Random float number generation
..., you can generate random numbers in any arbitrary interval you choose. This is sufficient for learning purposes and toy programs. If you need truly random numbers with normal distribution, you'll need to employ a more advanced method.
This will generate a number from 0.0 to 1.0, inclusive.
fl...
jsonify a SQLAlchemy result set in Flask [duplicate]
...actually haven't executed your query. Try following:
return jsonify(json_list = qryresult.all())
[Edit]: Problem with jsonify is, that usually the objects cannot be jsonified automatically. Even Python's datetime fails ;)
What I have done in the past, is adding an extra property (like serialize)...