matcher
🇬🇧/ˈmætʃə(r)/ 🇺🇸/ˈmætʃər/someone who arranges marriages, a person who seeks balance between giving and getting, and someone who looks for sameness in things
noun [专属名词] [计] 匹配程序;制榫机;匹配器
You can also define your own matcher or use an exact value. 你还可以定义自己的匹配器或者使用一个确定的值。