I am trying to find the max and min values in an associative array. Say I have:

double[char] bids;
bid['A'] = 37.50;
bid['B'] = 38.11;
bid['C'] = 36.12;

How can I find the max and min values. I am thinking that I need to use max and min functions from std.algorithm, but not sure how to.

Thanks!
TJB

On Wed, 06 Aug 2014 17:57:54 +0000, TJB wrote:

> I am trying to find the max and min values in an associative array. Say I have:
> 
> double[char] bids;
> bid['A'] = 37.50;
> bid['B'] = 38.11;
> bid['C'] = 36.12;
> 
> How can I find the max and min values. I am thinking that I need to use max and min functions from std.algorithm, but not sure how to.
> 
> Thanks!
> TJB

Do you just need the min and max values or do you also need the keys of those values?  If the former, here's a paste: http://dpaste.dzfl.pl/0bbf31278a25

On Wednesday, 6 August 2014 at 17:57:55 UTC, TJB wrote:
> I am trying to find the max and min values in an associative array. Say I have:
>
> double[char] bids;
> bid['A'] = 37.50;
> bid['B'] = 38.11;
> bid['C'] = 36.12;
>
> How can I find the max and min values. I am thinking that I need to use max and min functions from std.algorithm, but not sure how to.
>
> Thanks!
> TJB

You can extract the values into a double[] using bid.values. Then you can simply use max and min from std.algorithm.

On Wed, Aug 06, 2014 at 05:57:54PM +0000, TJB via Digitalmars-d-learn wrote:
> I am trying to find the max and min values in an associative array. Say I have:
> 
> double[char] bids;
> bid['A'] = 37.50;
> bid['B'] = 38.11;
> bid['C'] = 36.12;
> 
> How can I find the max and min values. I am thinking that I need to use max and min functions from std.algorithm, but not sure how to.
[...]

	import std.algorithm : reduce, max, min;

	auto highest = reduce!((a,b) => max(a,b))(-double.max, bids.byValue());
	auto lowest = reduce!((a,b) => min(a,b))(double.max, bids.byValue());


T

-- 
Designer clothes: how to cover less by paying more.

Justin,

That's it!  Perfect - thanks!!
TJB

> Do you just need the min and max values or do you also need the keys of
> those values?  If the former, here's a paste:
> http://dpaste.dzfl.pl/0bbf31278a25

TJB:

> I am trying to find the max and min values in an associative array. Say I have:
>
> double[char] bids;
> bid['A'] = 37.50;
> bid['B'] = 38.11;
> bid['C'] = 36.12;
>
> How can I find the max and min values. I am thinking that I need to use max and min functions from std.algorithm, but not sure how to.

void main() {
    import std.stdio, std.algorithm;

    double[char] bids = ['A': 37.50,
                         'B': 38.11,
                         'C': 36.12];

    bids.byValue.reduce!(min, max).writeln;
}

Bye,
bearophile

On Wednesday, 6 August 2014 at 18:07:08 UTC, H. S. Teoh via Digitalmars-d-learn wrote:
>
> 	import std.algorithm : reduce, max, min;
>
> 	auto highest = reduce!((a,b) => max(a,b))(-double.max, bids.byValue());
> 	auto lowest = reduce!((a,b) => min(a,b))(double.max, bids.byValue());
>
>
> T

Take a look at Justin Whear's dpaste. Dual pred reduce FTW.

On Fri, Aug 15, 2014 at 04:51:59PM +0000, monarch_dodra via Digitalmars-d-learn wrote:
> On Wednesday, 6 August 2014 at 18:07:08 UTC, H. S. Teoh via Digitalmars-d-learn wrote:
> >
> >	import std.algorithm : reduce, max, min;
> >
> >	auto highest = reduce!((a,b) => max(a,b))(-double.max, bids.byValue());
> >	auto lowest = reduce!((a,b) => min(a,b))(double.max, bids.byValue());
> >
> >
> >T
> 
> Take a look at Justin Whear's dpaste. Dual pred reduce FTW.

Yeah I saw that. Learned something new. :-)


T

-- 
Bare foot: (n.) A device for locating thumb tacks on the floor.