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Not equal != operator on NULL
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<> is Standard SQL-92; != is its equivalent. Both evaluate for values, which NULL is not -- NULL is a placeholder to say there is the absence of a value.
Which is why you can only use IS NULL/IS NOT NULL as predicates for such situ...
Why is the minimalist, example Haskell quicksort not a “true” quicksort?
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The true quicksort has two beautiful aspects:
Divide and conquer: break the problem into two smaller problems.
Partition the elements in-place.
The short Haskell example demonstrates (1), but not (2). How (2) is done may not be obvious if you don't already know the technique!...
Batch not-equal (inequality) operator
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this requires command extensions to be turned on (They are by default on 2000+ but can be turned off system wide or as a parameter to cmd.exe) Normally you should turn them on with setlocal, but for a simple if not equal test, just use "if not...
SQL Server Profiler - How to filter trace to only display events from one database?
...should see the database name. Enter the database name for the Like section and you should see traces only for that database.
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Copy files from one directory into an existing directory
...irectory, not the directory itself. This method also includes hidden files and folders.
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CORS - What is the motivation behind introducing preflight requests?
...ng-the-rules thing.
Preflight requests have nothing to do with security, and they have no bearing on applications that are being developed now, with an awareness of CORS. Rather, the preflight mechanism benefits servers that were developed without an awareness of CORS, and it functions as a sanity...
How to apply two CSS classes to a single element
... b"></div>
Using .a { ... } as a selector will select the first and third. However, if you want to select one which has both a and b, you can use the selector .a.b { ... }. Note that this won't work in IE6, it will simply select .b (the last one).
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Comparison of JSON Parser for Objective-C (JSON Framework, YAJL, TouchJSON, etc)
...w, there are three JSON Parsers for Objective-C, JSON Framework , YAJL , and Touch JSON . Then, These three would have their own characteristics.
For example:
YAJL can be used as a SAX style parser.
JSON Framework has relatively long history and is widely used.
Touch JSON parses NSData...
How to remove all white spaces in java [duplicate]
I have a programming assignment and part of it requires me to make code that reads a line from the user and removes all the white space within that line.
the line can consist of one word or more.
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catch exception that is thrown in different thread
...( Method1 ) spawns a new thread.
That thread execute a method ( Method2 ) and during exectution an exception is thrown.
I need to get that exception information on the calling method ( Method1 )
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