Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.13)
// Compass (v1.0.3)
// ----

/// Get closest element of $list from $number
/// @author Hugo Giraudel
/// @param {List} $list - List of numbers
/// @param {Number} $number - Number to get closest item from
/// @return {Number}
/// @example
///   closest(34 46 469 34 1, 42);
///   // -> 46
@function closest($list, $number) {
  $current: nth($list, 1);
  
  @each $value in $list {
    @if abs($number - $value) < abs($number - $current) {
      $current: $value
    }
  }
  
  @return $current;
}

// Test
.foo {
  $list: (34, 46, 90, 77, 1);
  
  @for $i from 1 through 100 {
    content: closest($list, $i);
  }
}

SassMeister-output.css

.foo {
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 1;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 34;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 46;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 77;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
  content: 90;
}