Functional programming: Difference between revisions

Revision as of 20:51, 16 April 2025

Revision as of 09:57, 3 May 2025

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=== Imperative vs. functional programming ===

The following two examples (written in [[JavaScript (programming language)|JavaScript]]) achieve the same effect: they multiply all even numbers in an array by 10 and add them all, storing the final sum in the variable "<code>result"</code>.

Traditional imperative loop:

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.map(a => a * 10)

.reduce((a, b) => a + b, 0);

</syntaxhighlight>Sometimes the abstractions offered by functional programming might lead to development of more robust code that avoids certain issues that might arise when building upon large amount of complex, imperative code, such as [[Offoff-by-one error|off-by-one errors]]s (see [[Greenspun's tenth rule]]).

=== Simulating state ===