Groovy tip 10 simplified string operations in groovy

Groovy tip 10 simplified string operations in groovyIn groovy, operations on string objects are as convenient as operations on List objects. For example, in Java, the substring method is used for operations on string objects. As follows: String STR = "abcdefg"; system. Out. Println (Str. substring (); the result is: BC has two inconveniences: first, the complexity of the substring method and parameters; second, its last parameter, such as substring) the result is not the first to the third, but the second, of the STR object. This is inconsistent with our intuition and often leads to errors. In groovy, the above Code is transformed into the following: DefSTR = 'abcdefg' PrintlnSTR [1 .. 2] The result is: BC, operate the string object like an array, STR [1 .. 2] what we get is the value from the first to the second, which is in line with our habits. Of course, you can also take any character in the string object: DefSTR = 'abcdefg' PrintlnSTR [, 5]: BDF is great! Since the string object operation is like the list object operation, some methods of the List class such as each can be used directly. DefSTR = 'abcdefg' Str. Each{ PrintIt Print','} Returns a, B, c, d, e, f, g, DefSTR = 'abcdefg' PrintlnStr. Contains ('D') returns true and so on. Other methods, such as "find", "findall", "Every", and "any", can be used in the string object. If you do not like the "FG" character after the STR object and want to delete it from the STR object, you must do this in Java: String STR = "abcdefg "; STR = Str. substring (0, 5); system. Out. Println (STR); In groovy, you can do this: DefSTR = 'abcdefg' STR = str-'fg' PrintlnOf course, you can also subtract "AB" from the STR object: DefSTR = 'abcdefg' STR = str-'AB' PrintlnThe STR result is: cdefg. What if "St" is subtracted from the STR object: DefSTR = 'abcdefg' STR = str-'st' PrintlnThe STR result is abcdefg. What if "be" is subtracted from the STR object: DefSTR = 'abcdefg' STR = str-'Be' PrintlnSTR: abcdefg