Programming-Idioms

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2015-09-30, 11:47:07

2015-09-30, 11:48:25

Idiom #77 Complex number

Declare a complex x and initialize it with value (3i - 2). Then multiply it by i.

Declare a complex x and initialize it with value (3i - 2). Then multiply it by i.

use Math::Complex;

use Math::Complex;

# Simple version: Clear, but less efficient
my $x = 3*i - 2;
$x *= i;

# Efficient version: faster
my $x = cplx(-2, 3);
$x *= i;

my $x = 3*i - 2;
$x *= i;

The simple starts with i, then uses a multiplication and a subtraction to build the complex number. The efficient version does it in one step.

Simple version: clear, but not efficient. It starts with i, then uses a multiplication and a subtraction to build the complex number.

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