eq相等 ne、neq不相等，
gt大於， lt小於
gte、ge大於等於
lte、le 小於等於
not非 mod求模
is [not] div by是否能被某數整除
is [not] even是否為偶數
is [not] even by $b即($a / $b) % 2 == 0
is [not] odd是否為奇
is not odd by $b即($a / $b) % 2 != 0
示例：
equal/ not equal/ greater than/ less than/ less than or equal/ great than or equal/后面的就不用說了
從Iteye的Franciswmf開發筆記轉載