Horner's rule for polynomial evaluation: Difference between revisions

=={{header|jq}}==

<syntaxhighlight lang=jq>

# Input: an array of coefficients specifying the polynomial

# to be evaluated at $x, where .[0] is the constant

def horner($x):

. as $coefficients

| reduce range(length-1; -1; -1) as $i (0; . * $x + $coefficients[$i]);

# Example

[-19, 7, -4, 6] | horner(3)

</syntaxhighlight>

'''Invocation''': $JQ -n -f horner.jq

where $JQ is either jq or gojq

{{output}}

<pre>

128

</pre>