C Sharp (C#) - Strings and StringBuilder
You want to sort a list of strings alphabetically ignoring case in C#. Which approach correctly compares two strings
x and y inside a custom comparer?You want to sort a list of strings alphabetically ignoring case in C#. Which approach correctly compares two strings x and y inside a custom comparer?
hard🚀 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand sorting comparer requirements
A comparer must return negative, zero, or positive int based on alphabetical order.Step 2: Check each option's return value and case sensitivity
return string.Compare(x, y, StringComparison.OrdinalIgnoreCase); uses string.Compare with OrdinalIgnoreCase, correctly returning int for sorting ignoring case. return x == y ? 0 : 1; returns only 0 or 1, not suitable. return x.Equals(y) ? 0 : -1; returns 0 or -1 but ignores order and case. return x.CompareTo(y); uses CompareTo which is case-sensitive.Final Answer:
return string.Compare(x, y, StringComparison.OrdinalIgnoreCase); -> Option BQuick Check:
Use string.Compare with OrdinalIgnoreCase for case-insensitive sorting [OK]
Quick Trick: Use string.Compare with OrdinalIgnoreCase in sorting comparer [OK]
Common Mistakes:
MISTAKES- Returning only 0 or 1 instead of negative/zero/positive
- Using case-sensitive CompareTo for ignoring case
- Using Equals which returns bool, not int
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