op-null-default: Null-coalescing operator

In fb4package: 'Fish Bioenergetics 4.0' Model Implementation with High-Performance 'TMB' Backend

Null-coalescing operator

Description

Returns x if it is not NULL, otherwise returns y. Equivalent to rlang::%||% but without requiring that dependency.

Usage

x %||% y

Arguments

x	Value to test
y	Fallback value if x is NULL

Value

x if not NULL, otherwise y

Examples

NULL %||% "default"
"value" %||% "default"
list()$missing %||% 0

fb4package documentation built on May 8, 2026, 1:07 a.m.