regex()

s

A string

rs

Regular expression

rpls

A string

@c

Case insensitive

@u

Use Unicode to match

@a

Replace all matching characters

@w

Find whether the regular expression matches with the whole string

A

1

4,23,a,test

2

a,D

3

W,F

4

=A1.regex("(\\d),([0-9]*),([a-z]),([a-z]*)")

5

=A2.regex@c("([a-z]),([a-z])")

With @c option, it is case insensitive.

6

=A2.regex("([a-z]),([a-z])")

Return null because they don’t match.

7

=A3.regex@u("(\\u0057),(\\u0046)")

[W,F]; Use unicode to match.

8

=A1.regex("([0-9])","hello")

hello,23,a,test.

9

=A1.regex@a("([0-9])","hello")

hello,hellohello,a,test.

10

="123abc".regex("[0-9]a")

123abc.

11

="123abc".regex@w("[0-9]a")

Use @w option to find whether the whole string matches and return null.

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.

cs

A cursor whose members are strings

rs

Regular expression

F_i

Resulting field name

@c

Case insensitive

@u

Use Unicode to match

A

1

["1,Rebecca","2,ashley","3,Rachel","4,Emily","5,Ashley","6,Matthew",

"7,Alexis","8,Megan","9,Victoria","10,Ryan"]

2

=A1.cursor()

Return a cursor.

3

=A2.regex("(.*),(A.*)";id,name)

Attach a computation to cursor A2, which will match members starting with A after the comma and return the original cursor A2; the computation is by default case sensitive.

4

=A2.fetch()

Fetch data from cursor A2 where A3’s computation is executed:

A

1

["1,Rebecca","2,ashley","3,Rachel","4,Emily","5,Ashley","6,Matthew",

"7,Alexis","8,Megan","9,Victoria","10,Ryan"]

2

=A1.cursor()

Return a cursor.

3

=A2.regex@c("(.*),(A.*)";id,name)

Attach a computation to cursor A2, which will match members starting with A or a after the comma and return the original cursor A2; @c option works to enable a case-insensitive computation.

4

=A2.fetch()

Fetch data from cursor A2 where A3’s computation is executed:

A

1

["销售部,李英梅","人事部,王芳","技术部,张峰","销售部,孙超"]

2

=A1.cursor()

Return a cursor.

3

=A2.regex@u("(\\u9500\\u552e\\u90e8),(.*)";部门,员工姓名)

Attach a computation to cursor A2, which, with @u option, will match members starting with "销售部" and return the original cursor A2.

4

=A2.fetch()

Fetch data from cursor A2 where A3’s computation is executed: