op-null-default

%||%

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

internal

An implementation of the 'Fish Bioenergetics 4.0' framework
described in Deslauriers et al. (2017)
<doi:10.1080/03632415.2017.1377558>. Provides automated parameter
optimization, multi-prey diet modeling, and comprehensive energy budget
simulations for fisheries research and aquaculture applications. An
optional 'TMB' (Template Model Builder) backend delivers 10-50x speedup
in maximum likelihood estimation while maintaining full backward
compatibility. Includes species-specific parameter databases and tools
for modeling fish growth, consumption, and metabolism under varying
environmental conditions.

Hans Ttito

fb4package

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

op-null-default function

<dl><dt>x</dt>
<dd>Value to test</dd>
<dt>y</dt>
<dd>Fallback value if <code>x</code> is <code>NULL</code></dd></dl>

Arguments

Null-coalescing operator — op-null-default

<dl>

<dt>x</dt>
<dd>Value to test</dd>


<dt>y</dt>
<dd>Fallback value if <code>x</code> is <code>NULL</code></dd>

</dl>

op-null-default: Null-coalescing operator

Description

Usage

Value

Arguments

Examples