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GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
BillWoodruff18-Jan-22 3:08
professionalBillWoodruff18-Jan-22 3:08 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
Richard Deeming18-Jan-22 6:17
mveRichard Deeming18-Jan-22 6:17 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
BillWoodruff19-Jan-22 13:58
professionalBillWoodruff19-Jan-22 13:58 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
Richard Deeming19-Jan-22 21:43
mveRichard Deeming19-Jan-22 21:43 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
BillWoodruff20-Jan-22 4:26
professionalBillWoodruff20-Jan-22 4:26 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
harold aptroot16-Jan-22 22:48
harold aptroot16-Jan-22 22:48 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
BillWoodruff18-Jan-22 0:49
professionalBillWoodruff18-Jan-22 0:49 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
jschell23-Jan-22 7:40
jschell23-Jan-22 7:40 
BillWoodruff wrote:
My impression in the SO thread cited is that this new Linq method is somehow more efficient.


Based on my experience I would not trust linq to be efficient at all. Made worse by people not even understanding what it might do.

The most major case is when linq is used with database queries. Via profiling I have seen numerous cases where the linq code that would seem to translate into a single SQL query that would return a very limited set instead pulls major parts of the table or even the entire table into memory and then processes via C# to get the results.

The second case is where a programmer is handed a dictionary and then uses linq to search for a key in the dictionary. But the form that they use means that linq will iterate all of the keys and look for a match rather than using the key directly. Not saying there isn't a different way to use it but rather I have seen it programmed this way so often that I have started to look for it.
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
BillWoodruff25-Jan-22 3:58
professionalBillWoodruff25-Jan-22 3:58 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
jschell30-Jan-22 6:22
jschell30-Jan-22 6:22 
QuestionRemove a page from pdf document in C# Pin
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AnswerRe: Remove a page from pdf document in C# Pin
OriginalGriff12-Jan-22 20:22
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GeneralRe: Remove a page from pdf document in C# Pin
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GeneralRe: Remove a page from pdf document in C# Pin
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QuestionRoots of polynomial , eigenvalue method Pin
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GeneralRe: Roots of polynomial , eigenvalue method Pin
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GeneralRe: Roots of polynomial , eigenvalue method Pin
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GeneralRe: Roots of polynomial , eigenvalue method Pin
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AnswerRe: Roots of polynomial , eigenvalue method Pin
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QuestionSerial communication between LPC2132 microcontroller and serial interface PC through RS 232 and RJ45 Pin
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AnswerRe: Serial communication between LPC2132 microcontroller and serial interface PC through RS 232 and RJ45 Pin
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GeneralMessage Closed Pin
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GeneralRe: Serial communication between LPC2132 microcontroller and serial interface PC through RS 232 and RJ45 Pin
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