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What's the Best Way to Shuffle an NSMutableArray?
...
I solved this by adding a category to NSMutableArray.
Edit: Removed unnecessary method thanks to answer by Ladd.
Edit: Changed (arc4random() % nElements) to arc4random_uniform(nElements) thanks to answer by Gregory Goltsov and comments b...
LINQ - Left Join, Group By, and Count
...tId equals c.ChildParentId into j1
from j2 in j1.DefaultIfEmpty()
group j2 by p.ParentId into grouped
select new { ParentId = grouped.Key, Count = grouped.Count(t=>t.ChildId != null) }
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i...
What is object slicing?
...u assign an object of a derived class to an instance of a base class, thereby losing part of the information - some of it is "sliced" away.
For example,
class A {
int foo;
};
class B : public A {
int bar;
};
So an object of type B has two data members, foo and bar.
Then if you were to w...
What is the difference between a strongly typed language and a statically typed language?
...tatically typed language has a type system that is checked at compile time by the implementation (a compiler or interpreter). The type check rejects some programs, and programs that pass the check usually come with some guarantees; for example, the compiler guarantees not to use integer arithmetic ...
How to have a default option in Angular.js select box
... I had a problem with this working, it was that I was using 'track by', removing it fixed the problem, just in case that helps someone down the line :D
– DrCord
Apr 15 '14 at 23:21
...
How to match, but not capture, part of a regex?
...ut this regular expression matches only apple or banana if it’s preceded by 123- and followed by -456, or it matches the empty string if it’s preceded by 123- and followed by 456.
|Lookaround | Name | What it Does |
-----------------------------------------...
How can I use optional parameters in a T-SQL stored procedure?
...a, your schema, and your actual usage:
Dynamic Search Conditions in T-SQL by by Erland Sommarskog
The Curse and Blessings of Dynamic SQL by Erland Sommarskog
If you have the proper SQL Server 2008 version (SQL 2008 SP1 CU5 (10.0.2746) and later), you can use this little trick to actually use an i...
How to avoid warning when introducing NAs by coercion
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Although this is the preferred response, the answer by jangorecki below seems, to me, more solid.
– Ian
Jul 6 at 15:29
add a comment
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Unexpected value from nativeGetEnabledTags: 0
...round I'm filtering the LogCat output with the following expression on the by Log Message field of the filter:
^(?!.*(nativeGetEnabledTags)).*$
Otherwise it is so spammed it's almost useless.
Following Laksh suggestion, if you want to filter this always without having to always write it on th...
Oracle Differences between NVL and Coalesce
... LENGTH(RAWTOHEX(SYS_GUID()))) AS val
FROM dual
CONNECT BY
level <= 10000
)
This runs for almost 0.5 seconds, since it generates SYS_GUID()'s, despite 1 being not a NULL.
SELECT SUM(val)
FROM (
SELECT COALESCE(1, LENGTH(RAWTOHEX(SYS_GUID(...