问题描述
我在 daml 文档中遇到了一些使用运算符“$”的示例,但无法完全理解其用途。
示例:
submit alice $ create User with username = alice,following = []
是否与 do
相同,例如:
submit alice do
create User with username = alice,following = []
?
解决方法
$
运算符是括号的替代。例子
submit alice $ create User with username = alice,following = []
与
相同submit alice (create User with username = alice,following = [])
为了完成,do
用于声明一个代码块(多于一行代码):
test = scenario do
alice <- getParty "Alice"
bob <- getParty "Bob"
...
但是,它也可以在一行代码中使用:
submit alice do create User with username = alice,following = []