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How do I implement a callback in PHP?
How are callbacks written in PHP?
9 Answers
9
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What's the best manner of implementing a social activity stream? [closed]
...stem and I took this approach:
Database table with the following columns: id, userId, type, data, time.
userId is the user who generated the activity
type is the type of the activity (i.e. Wrote blog post, added photo, commented on user's photo)
data is a serialized object with meta-data for the ...
How do I specify “close existing connections” in sql script
...rop the database with existing connections may look like this:
DECLARE @dbId int
DECLARE @isStatAsyncOn bit
DECLARE @jobId int
DECLARE @sqlString nvarchar(500)
SELECT @dbId = database_id,
@isStatAsyncOn = is_auto_update_stats_async_on
FROM sys.databases
WHERE name = 'db_name'
IF @isStatAsy...
Adding div element to body or document in JavaScript
...
Try this out:-
http://jsfiddle.net/adiioo7/vmfbA/
Use
document.body.innerHTML += '<div style="position:absolute;width:100%;height:100%;opacity:0.3;z-index:100;background:#000;"></div>';
instead of
document.body.innerHTML = '<div...
UICollectionView's cellForItemAtIndexPath is not being called
...ectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
was not being called was because of the itemSize for the collectionViewFlowLayout's height was too big.
[self.myCollectionViewFlowLayout setItemSize:CGSizeMake(320, 548)];
If I change the height to 410, it will execute cellForItemAtInde...
How to “properly” create a custom object in JavaScript?
...pe at '+this.x+', '+this.y;
};
Now to subclass it, in as much as you can call what JavaScript does subclassing. We do that by completely replacing that weird magic prototype property:
function Circle(x, y, r) {
Shape.call(this, x, y); // invoke the base class's constructor function to take co...
How to navigate through a vector using iterators? (C++)
...to move an iterator forward n spaces is not to write your own loop, but to call std::advance(it, n). It's defined to do exactly what you want, and it will automatically use it + n if the iterator is tagged as random-access, or do the loop if it has to.
– Steve Jessop
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Should *.xccheckout files in Xcode5 be ignored under VCS?
... as I run xcode it changes some keys in the file, and it changes something called IDESourceControlWCCName from <string>OurCompanyAPI</string> to <string>our_company_api/string> - the latter being the name I used when cloning the repo. If this file is supposed to be shared, then...
How to call a method with a separate thread in Java?
let's say I have a method doWork() . How do I call it from a separate thread (not the main thread).
7 Answers
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lenses, fclabels, data-accessor - which library for structure access and mutation is better
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There are at least 4 libraries that I am aware of providing lenses.
The notion of a lens is that it provides something isomorphic to
data Lens a b = Lens (a -> b) (b -> a -> a)
providing two functions: a getter, and a setter
get (Lens g _) = g
put (Lens _ s) = s
...