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

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TypeScriptCollections & records

Filter and transform an array

Keep active objects and extract their names.

filter✓ Tested
JavaScriptArrays

Filter even numbers

Create a JavaScript array containing only even values.

JavaScript✓ Tested
PowerShellCollections & objects

Filter items in a pipeline

Keep numbers that meet a condition.

Where-Object✓ Tested
PowerShellGetting Started

Filter pipeline values

PowerShell: Filter pipeline values using PowerShell 7.

PowerShell✓ Tested
C++Sequence algorithms

Find both extremes in one algorithm call

C++: Check for a nonempty input before dereferencing the returned iterators.

C++✓ Tested
jQueryTraversal & selection

Find descendants

Select only matching descendants of a jQuery container.

jQuery✓ Tested
PowerShellHashtables & object records

Find differences between two collections

PowerShell: Compare-Object marks reference-only values with a left arrow and difference-only values with a right arrow.

PowerShell✓ Tested
Linux CommandsFiles & folders

Find files by extension

Search a directory tree for regular files with a particular extension and print their paths.

find✓ Tested
PowerShellFile operations & integrity

Find matching files recursively

PowerShell: Select files explicitly and sort their names for predictable presentation.

PowerShell✓ Tested
SQLRelationships & missing data

Find parents whose every child meets a rule

SQL: Combine existence with the absence of a violating child to exclude parents with no children.

SQL✓ Tested
SQL ServerRelationships & missing data

Find parents whose every child meets a rule

SQL Server: Combine existence with the absence of a violating child to exclude parents with no children.

SQL Server✓ Tested
PostgresRelationships & missing data

Find parents whose every child meets a rule

Postgres: Combine existence with the absence of a violating child to exclude parents with no children.

Postgres✓ Tested