src/rect.js
function isBetween(p, left, right) {
    if (p >= left && p <= right)
        return true;

    return false;
}
function isBetween(p, left, right) {
    if (p >= left && p <= right)
        return true;

    return false;
}
function isBetween ( p , left , right ) { if ( p >= left && p <= right ) return true ; return false ; }
Returns true if (left <= p <= right).
False otherwise.
Returns true if ( left < = p < = right ) . False otherwise .