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Count the items from a IEnumerable without iterating?
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Just adding extra some info:
The Count() extension doesn't always iterate. Consider Linq to Sql, where the count goes to the database, but instead of bringing back all the rows, it issues the Sql Count() command and returns that result ...
Making a UITableView scroll when text field is selected
... above the keyboard whenever the textfields become the first responder. No extra code needed.
– Sam Ho
Sep 23 '10 at 5:03
3
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How to convert Linux cron jobs to “the Amazon way”?
...ntab. There is a case study at the end that helped me understand what that extra complexity buys you. I would suggest watching the case study and considering your requirements for scalability and fault tolerance to decide whether you should migrate from your existing crontab solution.
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Get the current displaying UIViewController on the screen in AppDelegate.m
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@Mingming it shouldn't be that hard to add an extra if to check if its the custom container VC (in the getVisibielController method) and if so return the "visible" controller, which would typically be vc.childControllers.lastObject for most custom container VC implementa...
How do I empty an array in JavaScript?
...qual-0-or-new-array I think if you have one refence (and you haven't added extra properties that you want to keep), it is better to create new array, and leaves old to the garbage collector, that will run when appropriate.
– Paul Brewczynski
Nov 16 '13 at 19:08...
LINQ Ring: Any() vs Contains() for Huge Collections
...re properties. With .Contains you can just compare objects and you need an extra IEqualityComparer to compare properties.
– msfanboy
Feb 4 '11 at 20:23
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What is the difference between dict.items() and dict.iteritems() in Python2?
...eal list of tuples and returned that. That could potentially take a lot of extra memory.
Then, generators were introduced to the language in general, and that method was reimplemented as an iterator-generator method named iteritems(). The original remains for backwards compatibility.
One of Pyth...
In PHP, what is a closure and why does it use the “use” identifier?
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ohhhhhhhh, so the Uses is used to pass in extra variables, I thought it was some funny assignment. Thanks!
– SeanDowney
Jul 1 '09 at 20:31
41
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Can a class extend both a class and implement an Interface
...ll also change. Second, inheritance is used to SPECIALIZE, not EXTEND with extra functionality. This is the most misunderstood thing in OOP. As a rule of thumb I tend to extend abstract classes only.
– Michał Rudnicki
Mar 16 '09 at 21:25
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How to detect Adblock on my website?
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No extra requests. No external libraries. Just plain, simple JavaScript:
var adBlockEnabled = false;
var testAd = document.createElement('div');
testAd.innerHTML = ' ';
testAd.className = 'adsbox';
document.bod...