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GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
BillWoodruff19-Jan-22 14:58
professionalBillWoodruff19-Jan-22 14:58 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
Richard Deeming19-Jan-22 22:43
mveRichard Deeming19-Jan-22 22:43 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
BillWoodruff20-Jan-22 5:26
professionalBillWoodruff20-Jan-22 5:26 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
harold aptroot16-Jan-22 23:48
harold aptroot16-Jan-22 23:48 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
BillWoodruff18-Jan-22 1:49
professionalBillWoodruff18-Jan-22 1:49 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
jschell23-Jan-22 8:40
jschell23-Jan-22 8:40 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
BillWoodruff25-Jan-22 4:58
professionalBillWoodruff25-Jan-22 4:58 
GeneralRe: necessity to use .Any() to check if an IEnumerable<T> result has no items without iterating over it ? Pin
jschell30-Jan-22 7:22
jschell30-Jan-22 7:22 
BillWoodruff wrote:
Re Dictionary: since Keys are implemented as Hashes, does this affect search by Linq ?


Idea of a Dictionary/hash is that it first uses the hash to find a bucket then uses the bucket (list) to find an exact match. Within the constraints of the data, especially larger sets, using that algorithm can be much more efficient than just searching a list sequentially. With all things using is correctly for the case is important.

Dictionaries can also iterate on all of the contents. So you use it just like a list. And in the cases I have seen people have been doing that.

BillWoodruff wrote:
The canonical way to search for a (possibly not present) Key in a Dictionary is via


The programmers just want to find it by key but use linq which instead resolves to a list lookup. And in that case it is a programmer fault not linq.
QuestionRemove 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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QuestionSerial communication between LPC2132 microcontroller and serial interface PC through RS 232 and RJ45 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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GeneralRe: Serial communication between LPC2132 microcontroller and serial interface PC through RS 232 and RJ45 Pin
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