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C++Sequence algorithms

Count elements satisfying a predicate

C++: count_if counts matches without constructing a filtered collection.

C++✓ Tested
Linux CommandsText processing

Count lines in a file

Count newline characters in a text file, printing only the count without the filename.

lines✓ Tested
PythonCollections

Count occurrences in a list

Count how often each value appears using Counter from the standard library.

count✓ Tested
C++Ordering & set operations

Count occurrences in a sorted sequence

C++: equal_range finds the half-open interval containing values equal to the key.

C++✓ Tested
GoMaps & sets

Count repeated words

Count repeated words using a complete Go program with explicit sample inputs.

Go✓ Tested
CSmall algorithms & bit operations

Count set bits in an unsigned integer

C: Clearing the lowest set bit on each iteration counts only one iteration per set bit.

C✓ Tested
PythonGetting Started

Count the items in a collection

Python: Read the collection’s length instead of hard-coding the loop limit.

Python✓ Tested
JavaGetting Started

Count the items in a collection

Java: Read the collection’s length instead of hard-coding the loop limit.

Java✓ Tested
JavaScriptGetting Started

Count the items in a collection

JavaScript: Read the collection’s length instead of hard-coding the loop limit.

JavaScript✓ Tested
TypeScriptGetting Started

Count the items in a collection

TypeScript: Read the collection’s length instead of hard-coding the loop limit.

TypeScript✓ Tested
C++Getting Started

Count the items in a collection

C++: Read the collection’s length instead of hard-coding the loop limit.

C++✓ Tested
CGetting Started

Count the items in a collection

C: Read the collection’s length instead of hard-coding the loop limit.

C✓ Tested