Kevin Ryde > Math-NumSeq-71 > Math::NumSeq::Cubes

Math-NumSeq-71.tar.gz

Dependencies

Annotate this POD

Website

# CPAN RT

 Open 2
View/Report Bugs
Module Version: 71

# NAME

Math::NumSeq::Cubes -- cubes i**3

# SYNOPSIS

``` use Math::NumSeq::Cubes;
my \$seq = Math::NumSeq::Cubes->new;
my (\$i, \$value) = \$seq->next;```

# DESCRIPTION

The sequence of cubes i**3,

`    0, 1, 8, 27, 64, 125, ...`

# FUNCTIONS

See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence classes.

`\$seq = Math::NumSeq::Cubes->new ()`

Create and return a new sequence object.

## Iterating

`(\$i, \$value) = \$seq->next()`

Return the next index and value in the sequence.

If `\$value` overflows a usual Perl UV integer the return is promoted to `Math::BigInt` to preserve all bits.

`\$seq->seek_to_i(\$i)`

Move the current sequence position to `\$i`. The next call to `next()` will return `\$i` and corresponding value.

`\$seq->seek_to_value(\$value)`

Move the current sequence position so that `next()` will give `\$value` on the next call, or if `\$value` is not a cube then the next cube above `\$value`.

## Random Access

`\$value = \$seq->ith(\$i)`

Return `\$i*\$i*\$i`.

`\$bool = \$seq->pred(\$value)`

Return true if `\$value` is a cube.

`\$i = \$seq->value_to_i_ceil(\$value)`
`\$i = \$seq->value_to_i_floor(\$value)`

Return the cube root of `\$value`, rounded up or down to the next integer.

`\$i = \$seq->value_to_i_estimate(\$value)`

Return an estimate of the i corresponding to `\$value`.

http://user42.tuxfamily.org/math-numseq/index.html