A. regex()

A.regex(rs,F_i)

If no extracting item is specified in rs, match field F_i of the string with rs based on data type. Then return the new record sequence after record sequence A is filtered. Use the current record to match with rs if omitting F_i

A.regex(rs;F_i,…)

If one or more extracting items are specified in rs, split the string members of sequence A according to them, and return the results as a table sequence whose fields are F_i

A

A sequence or a record sequence whose members are strings

rs

Regular expressions. The extracting items are specified sub-regular expressions which are separated from each other by separators and each is surrounded with the parentheses. They will match the fields in sequence. For example, "(.*),(a.*)" are two extracting items separated by a comma

F_i

Resulting field names of string type

@c

Case insensitive

@u

Use Unicode to match

A

1

=demo.query("select NAME,SURNAME from EMPLOYEE")

2

=A1.(~.array().concat@c())

Convert to a sequence of strings.

3

=A2.regex("A.*")

By default, use current record to match with rs if omitting F_i.

4

=A2.regex("(V.*),(.*)";name,surname)

Match members of A2 with the regular expressions and return a table sequence.

5

=file("D:\\a.txt").import@ts()

6

=A5.(#1).regex@c("(.*),(a.*)";id,name)

Match names that start with a or A.

7

=file("D:\\c.txt":"UTF-8").import@ts()

8

=A7.(~.array().concat@c())

9

=A8.regex@u("(\\u9500\\u552e\\u90e8),(.*)";SalesDep,EmployeeName)

Use Unicode to match the Sales Dep.

10

=A1.regex("V.*",NAME)

Without an extracting item, match the regular expression rs with the string type F_i field.