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Why should casting be avoided? [closed]

I generally avoid casting types as much as possible since I am under the impression that it's poor coding practice and may incur a performance penalty. ...
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When to use Cast() and Oftype() in Linq

I am aware of two methods of casting types to IEnumerable from an Arraylist in Linq and wondering in which cases to use them? ...
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TSQL - Cast string to integer or return default value

Is there a way in T-SQL to cast an nvarchar to int and return a default value or NULL if the conversion fails? 8 Answers ...
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SHA512 vs. Blowfish and Bcrypt [closed]

... algorithms to Java, and you can find a freely licensed version of them at ftp://ftp.arlut.utexas.edu/java_hashes/. Note that most modern (L)Unices support Drepper's algorithm in their /etc/shadow files. share | ...
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Java Stanford NLP: Part of Speech labels?

.../">Penn Treebank * Project</a> standard. * * @see <a href="ftp://ftp.cis.upenn.edu/pub/treebank/doc/tagguide.ps.gz">Penn Treebank Specification</a> */ public enum PartOfSpeech { ADJECTIVE( "JJ" ), ADJECTIVE_COMPARATIVE( ADJECTIVE + "R" ), ADJECTIVE_SUPERLATIVE( ADJECT...
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How to cast int to enum in C++?

How do I cast an int to an enum in C++? 5 Answers 5 ...
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Difference between is and as keyword

... is The is operator checks if an object can be cast to a specific type. Example: if (someObject is StringBuilder) ... as The as operator attempts to cast an object to a specific type, and returns null if it fails. Example: StringBuilder b = someObject as StringBuil...
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Casting a variable using a Type variable

In C# can I cast a variable of type object to a variable of type T where T is defined in a Type variable? 12 Answers ...
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Fastest way to convert string to integer in PHP

...hing to do with the fact that intval() invokes a function call, whilst the cast is handled directly in the interpreter's expression calculator. This may also be the reason a co-ercion is even faster. – staticsan Oct 27 '08 at 6:09 ...
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T-SQL Cast versus Convert

What is the general guidance on when you should use CAST versus CONVERT ? Is there any performance issues related to choosing one versus the other? Is one closer to ANSI-SQL? ...