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How do I check if a variable exists?
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Ok, and how can i check attribute existing in class?
– Max Frai
May 9 '09 at 13:19
8
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SqlDataAdapter vs SqlDataReader
...ver once
Is not as useful for updating back to the database
On the other hand, it:
Only has one record in memory at a time rather than an entire result set (this can be HUGE)
Is about as fast as you can get for that one iteration
Allows you start processing results sooner (once the first record is...
How to Set AllowOverride all
...know how to do it. I have found the following code by searching the google and pasted it in .htaccess :
11 Answers
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LINQ Select Distinct with Anonymous Types
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Have a read through K. Scott Allen's excellent post here:
And Equality for All ... Anonymous Types
The short answer (and I quote):
Turns out the C# compiler overrides
Equals and GetHashCode for anonymous
types. The implementation of the two
overridden methods uses all the...
When should I use a trailing slash in my URL?
...misused.
Basically the URL format came from the same UNIX format of files and folders, later on, on DOS systems, and finally, adapted for the web.
A typical URL for this book on a Unix-like operating system would be a file path such as file:///home/username/RomeoAndJuliet.pdf, identifying the e...
What does jquery $ actually return?
I have read the JQuery documentation, and while much attention is devoted to what you should pass the function, I don't see any information on what it actually returns .
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Uses for the Java Void Reference Type?
...tions.newSetFromMap uses Boolean as maps don't have to accept null values) and java.security.PrivilegedAction.
I wrote a weblog entry on Void a few years back.
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Bootstrap Carousel : Remove auto slide
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That will make the auto sliding stop because there no Milliseconds added and will never slider next.
Via Html By adding data-interval="false" and removing data-ride="carousel"
<div id="carouselExampleCaptions" class="carousel slide" data-ride="carousel">
becomes:
<div id="carousel...
Programmatically scroll a UIScrollView
...at I end up with a slideshow that runs on its own with a click of a button and a configurable pause between each scroll?
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Interactive search/replace regex in Vim?
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Add the flag c (in the vim command prompt):
:%s/old/new/gc
will give you a yes/no prompt at each occurrence of 'old'.
Vim's built-in help offers useful info on the options available once substitution with confirmation has been selected. Use:
:h :s
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