Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.1.0)
// ----

// uncomment the fraction line to break libsass...

$numbers: (
  integer: 4,
  decimal: .25,
  // fraction: 1/4, 
);

.test {
  @each $key in map-keys($numbers) {
    $number: map-get($numbers, $key);
    #{$key}: if($number > 0, true, false);
  }
}

SassMeister-output.css

.test {
  integer: true;
  decimal: true; }