Additional functions for Sass List Maps

SassMeister-input.scss

// ----
// Sass (v3.2.14)
// Compass (v0.12.2)
// Sass List-Maps (v0.9.3)
// ----

@import "sass-list-maps";

/*
EXTRA FUNCTIONS FOR SASS LIST MAPS
*/

// map-subvalues() function: retrieves values for key at given depth
@function map-subvalues($map, $key, $depth) {
  $output: ();
  @if $depth > 1 { @each $tuple in $map { $output: append($output, map-subvalues(value($tuple), $key, $depth - 1)); } }
  @else { $output: get($map, $key); }
  @return $output; 
}

$memo-data: ();

// helper to chain arguments as a string
@function arg-chain($args...) {
  $output: ('#{nth($args, 1)}');
  @for $n from 2 through length($args) { $output: $output + '-#{nth($args, $n)}'; }
  @return $output;
}

// memoization pattern
@function memoizingFunction($arg1, $arg2) {
  $memo-key: 'memoizingFunction-' + arg-chain($arg1, $arg2);
  $memo-val: map-get($memo-data, $memo-key);
  @if $memo-val { @return $memo-val; } 
  @else {
    $memo-val: 'TBD';
    $memo-data: map-merge-z($memo-data, $memo-key, $memo-val);
    @return $memo-val;
  }
}

SassMeister-output.css

/*
EXTRA FUNCTIONS FOR SASS LIST MAPS
*/

revision of mq approach; waiting to merge