words learned from Basic Operators of Swift

• capability n.改进
• eliminate v.消除

improve several capabilities to eliminate comman coding errors

• terminology n.术语
• unary binary ternary adj. 一元的 二元的 三元的

unary operators
binary operators
ternary operator

• prefix operator 前置运算符
• postfix operator 后置运算符
• infix operator 中置运算符
• operand n.运算数

operators are next to operands

• concatenation n.串接

string concatenation`

• remainder operator 求余运算符
• identity operator 恒等运算符
• coalesc v.结合
• nil-coalescing operator 空合运算符
• shortcut 便捷方式

swift provides range operators as a shortcut for expressing a range of value

• alternative adj.另一个

alternative form

• context n. 情景

in other contexts

• subscript n.下标

subscript of arrays