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Small, practical examples. Search by task or narrow things down below.

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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
JavaText validation & formatting

Count Unicode code points

Java: Use codePointCount when supplementary characters should count as one rather than two UTF-16 units.

Java✓ Tested
JavaScriptText handling & Unicode

Count Unicode code points in a string

JavaScript: String iteration combines surrogate pairs, unlike the UTF-16 length property.

JavaScript✓ Tested
TypeScriptText handling & Unicode

Count Unicode code points in a string

TypeScript: String iteration combines surrogate pairs, unlike the UTF-16 length property.

TypeScript✓ Tested
Linux CommandsStreams & byte tools

Count whitespace-separated words

Linux Commands: Use wc -w with standard input to omit the filename column.

Linux Commands✓ Tested
JavaCollections

Count word frequencies

Use Map.merge to count repeated words in Java.

Java✓ Tested
C++Collections

Count word frequencies

Accumulate word counts in an ordered C++ map.

C++✓ Tested
TypeScriptCollections & records

Count words using a Map

Update a keyed counter without losing its value type.

Map✓ Tested
GitBranches & ancestry

Create a branch from a known release tag

Git: A named starting revision makes the branch’s initial commit explicit.

Git✓ Tested
GitGetting Started

Create a branch without switching to it

Git: Create a branch without switching to it inside the disposable repository created by the input setup.

Git✓ Tested