Arrays with LESS

less

@material-colors: red #f44336,
pink #e91e63,
purple #9c27b0,
deep-purple #673ab7,
indigo #3f51b5,
blue #2196f3,
light-blue #03a9f4,
cyan #00bcd4,
teal #009688,
green #4caf50,
light-green #8bc34a,
lime #cddc39,
yellow #ffeb3b,
amber #ffc107,
orange #ff9800,
deep-orange #ff5722,
blue-grey #607d8b;


.iter(length(@material-colors));
.iter(@i) when (@i > 0) {
    .iter(@i - 1);
    @pair:  extract(@material-colors, @i); 
    @key:   extract(@pair, 1);
    @value: extract(@pair, 2); 
    .checkbox--@{key}:checked:before {
        color: @value;  
    }
}

Source