cursor cs cursor … cursor

Read(74) Label: cursor-generating, path,

Description:

Define a channel for each cursor according to a specified cursor.

Syntax:

cursor cs

cursor

cursor

Note:

The statement defines a channel for each cursor according to cursor cs (the value of the cursor cell is a channel), traverses cs to perform a calculation over the channel in the code block and write the result into the cell of cursor.

Parameters:

cs

A cursor

A code block

Return value:

Result set of channel

Example:

 

A

B

 

1

=to(100000).new(rand(1000):f1,rand(1000):f2).cursor()

 

Generate a cursor

2

cursor A1

=A2.groups(f1:count(1))

Traverse cursor A1, calculate A2’s channel in B2’s code block and write the result to A2

3

cursor

=A3.groups(f2:count(1))

Same as the above