round beautiful and ceilAbs beutiful

ceilAbsBeautiful.js

//ceils an absolute value of the number 'num' (so negative 'num' gets floored instead of being ceiled)
//so that its coefficient 'm' while 'num' is represented in scientific notation (num = m*10^n)
//is either a multiple of one of some number from 'to' array
//or exactly matches one of the numbers in 'to' array
//numbers to match exactly should be negative in 'to' array (to differ them from multiples)

var ceilAbs = function(num, to, bias) { // for example num = -165.4621
  if (!to) to = [-2, 5] // to = [-2, 5] (beautiful values are: ...0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10...)
  if (!bias) bias = 0	// bias = 0
  var mults = to.filter(function(value) {return value > 0})	// mults = [5], m of the result should be eiter a multiple of 5
  to = to.filter(function(value) {return value < 0}).map(Math.abs) // to = [2], or match 2 exactly
  var numAbs = Math.abs(num) - bias	// numAbs = 165.4621
  var exp = Math.floor( Math.log10(numAbs) ) // exp = 2
  var m = Math.abs(numAbs) * Math.pow(10, -exp)	// m = 1.654621 (numAbs = 1.654621 * 10^2)
  var mRounded = Infinity	// mRounded = Infinity
  
  for (var i=0; i<mults.length; i++) {	// ceil m to closest mult
    var candidate = mults[i] * Math.ceil(m / mults[i]) // candidate = 5
    if (candidate < mRounded)	// 5 < Infinity = true (candidate is closer to m than mRounded)
      mRounded = candidate // so assing the candidate to  mRounded
  }
  for (var i=0; i<to.length; i++) {	// now check if any of the exact matches are closer
    if (to[i] >= m && to[i] < mRounded)	// 2 >= 1.654621 && 2 < 5 = true
      mRounded = to[i] // so 2 is closer than 5
  }
  return Math.sign(num) * mRounded * Math.pow(10, exp) + bias // rounded = -1 * 2 * 10^2 + 0 = 200
}