Results for “Array traversal & selection”
Small, practical examples. Search by task or narrow things down below.
Prepend items while preserving existing array values
Bash Scripts: Construct a new array with the new values before the quoted original expansion.
Bash Scripts✓ Tested
Process every array element
PowerShell: Process every array element using PowerShell 7.
PowerShell✓ Tested
Read a selection when its change event fires
jQuery: A change handler observes the current selected value.
jQuery✓ Tested
Read an optional associative-array entry
Bash Scripts: Use a fallback expansion when a map key may not be present under nounset.
Bash Scripts✓ Tested
Read complete lines into an array
Bash Scripts: Mapfile with -t removes each line terminator but preserves other whitespace.
Bash Scripts✓ Tested
Read null-delimited filenames into an array
Bash Scripts: A null delimiter preserves spaces and embedded newlines in filenames.
Bash Scripts✓ Tested
Read the first array element
Bash Scripts: Read the first array element with a small standalone Bash program.
Bash Scripts✓ Tested
Read the last array element
PowerShell: A negative array index counts backward from the end.
PowerShell✓ Tested
Remove adjacent duplicates from a sorted array
C: Compact equal neighbors with a write index after sorting or otherwise establishing order.
C✓ Tested
Remove an indexed element and compact the array
Bash Scripts: Unsetting an element leaves a gap; reassigning the values creates consecutive indices.
Bash Scripts✓ Tested
Remove one array element and close the gap
C: memmove handles the overlap while the logical length shrinks by one.
C✓ Tested
Replace an array segment in place
JavaScript: splice returns removed items and inserts replacements at the chosen position.
JavaScript✓ Tested