正则相关
目录
语法一览图
补充说明
分组
非捕获组
`What is -?\d+(?: (?:plus|minus|divided by|multiplied by) -?\d+)*\?`上面的正则表达式可以匹配
“What is 5?”
“What is -10?”
“What is 4 plus 5?”
“What is 3 minus 2 divided by 1?”
“What is -2 multiplied by -4 divided by 2 plus 6?”
非捕获组
`What is -?\d+(?: (?:plus|minus|divided by|multiplied by) -?\d+)*\?`上面的正则表达式可以匹配
“What is 5?”
“What is -10?”
“What is 4 plus 5?”
“What is 3 minus 2 divided by 1?”
“What is -2 multiplied by -4 divided by 2 plus 6?”