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[lp_decimal_precisionGet]

Description

Link: [lp_decimal_precisionGet]

Author: Bil Corry

Category: Math

Version: 8.x

License: Public Domain

Posted: Nov. 22, 2005

Updated: Dec. 23, 2005

More by this author...

Returns the precision (aka number of significant digits) of a decimal. Due to random digits in the floating-point math**, it looks for three or more zeros between the significant digits and excludes them and all digits that follow.

Note: Requires [lp_decimal_precisionSet], [lp_string_split]

**http://docs.sun.com/source/806-3568/ncg_goldberg.html

Parameters

-number

decimal, required

A decimal number that you want to know how many places you need to show the entire number.

Sample Usage

'<pre>';
var:'test' = 10;
loop: 66;
	lp_decimal_precisionSet: $test, 64; '\r\n';
	lp_decimal_precisionSet: $test, (lp_decimal_precisionGet: $test); '\r\n';
	lp_decimal_precisionGet: $test; '\r\n\r\n';
	'\r\n';
	$test *= .1;
/loop;
'</pre>';

Source Code

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[

define_tag:'lp_decimal_precisionGet',
	-description='Returns the precision (aka number of significant digits) of a decimal.',
	-priority='replace',
	-required='number', -copy;
	
	#number = string:(lp_decimal_precisionSet: #number, 64);
	#number->(removetrailing:'0');
	#number = #number->(split:'.')->(get:2);

	local:'temp' = #number;
	#temp->(removeleading:'0');

	#temp = (lp_string_split:#temp,'000',2);
	if: #temp->size == 1;
		return: #number->size;
	else;
		return: #number->size - #temp->(get:2)->size - 3;
	/if;
	
/define_tag;

]

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