Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.4)
// Compass (v1.0.0.alpha.18)
// ----

// [Helper]
// Cast a stringified number to an actual number
// ---
// @param [string] $input: stringified number to cast
// ---
// @return [number] | $input

@function try-cast($input) {
  $index: index('0' '1' '2' '3' '4' '5' '6' '7' '8' '9', $input);
  
  @if type-of($input) == 'number' 
   or type-of($index) != 'number' {
    @return $input;
  }
  
  @return nth(0 1 2 3 4 5 6 7 8 9, $index);
}

// [Helper]
// Function splitting a string as a list based on a needle
// ---
// @param [string] $string: string to split
// @paral [string] $needle (.): separator
// ---
// @return [list]

@function str-split($string, $needle: '.') {
  $result: ();
  @while str-index($string, $needle) {
    $index: str-index($string, $needle);
    $result: append($result, try-cast(str-slice($string, 1, $index - 1)));
    $string: str-slice($string, $index + str-length($needle));
  }
  @return append($result, try-cast($string));
}

// [Core]
// Function to access values in nested maps/lists
// ---
// @param [map] | [list] $map: map or list to parse
// @param [string] $string: accessor
// ---
// @return [literal]

@function map-deep-get($map, $string) {
  @each $key in str-split($string) {
    $map: if(type-of($key) == string, map-get($map, $key), nth($map, $key));
  }
  @return $map;
}

// [Alias]
// Alias for `map-deep-get` function
@function dot($map, $string) {
  @return map-deep-get($map, $string); 
}

// Sample map
$map: (
  tags: (incididunt, amet, sunt, incididunt, in, cupidatat, tempor),
  friends: (
    (
      id: 0,
      name: Audrey Henson
    ),
    (
      id: 1,
      name: Nichole Macdonald
    ),
    (
      id: 2,
      name: Christina Finch
    )
  ),
  config: (
    breakpoints: (
      desktop: 1200,
      tablet: 900,
      modile: 600
    )
  )
);

dot-accessor {
  /* Catching the `2`nd item from `friends` from `$map` */
  $test: 'friends.2';
  #{$test}: inspect(dot($map, $test));
  
  /* Catching the `name` of the `1`st item from `friends` from `$map` */
  $test: 'friends.1.name';
  #{$test}: dot($map, $test);
  
  /* Catching the `4`th from `tags` from `$map` */
  $test: 'tags.4';
  #{$test}: dot($map, $test);
  
  /* Catching the `desktop` value from `breakpoints` from `config` */
  $test: 'config.breakpoints.desktop';
  #{$test}: dot($map, $test);
}

SassMeister-output.css

dot-accessor {
  /* Catching the `2`nd item from `friends` from `$map` */
  friends.2: (id: 1, name: Nichole Macdonald);
  /* Catching the `name` of the `1`st item from `friends` from `$map` */
  friends.1.name: Audrey Henson;
  /* Catching the `4`th from `tags` from `$map` */
  tags.4: incididunt;
  /* Catching the `desktop` value from `breakpoints` from `config` */
  config.breakpoints.desktop: 1200;
}