prepend for filters

Prepend any number of rows to a table.

Signature

> prepend {flags} (row)

Parameters

  • row: the row, list, or table to prepend

Input/output types:

inputoutput
anylist<any>

Examples

prepend a list to an item

> 0 | prepend [1 2 3]
╭───┬───╮
 0  1 
 1  2 
 2  3 
 3  0 
╰───┴───╯

Prepend a list of strings to a string

> "a" | prepend ["b"]
╭───┬───╮
 0  b 
 1  a 
╰───┴───╯

Prepend one int item

> [1 2 3 4] | prepend 0
╭───┬───╮
 0  0 
 1  1 
 2  2 
 3  3 
 4  4 
╰───┴───╯

Prepend two int items

> [2 3 4] | prepend [0 1]
╭───┬───╮
 0  0 
 1  1 
 2  2 
 3  3 
 4  4 
╰───┴───╯

Prepend ints and strings

> [2 nu 4 shell] | prepend [0 1 rocks]
╭───┬───────╮
 0      0 
 1      1 
 2  rocks 
 3      2 
 4  nu    
 5      4 
 6  shell 
╰───┴───────╯

Prepend a range

> [3 4] | prepend 0..2
╭───┬───╮
 0  0 
 1  1 
 2  2 
 3  3 
 4  4 
╰───┴───╯

Notes

Be aware that this command 'unwraps' lists passed to it. So, if you pass a variable to it, and you want the variable's contents to be prepended without being unwrapped, it's wise to pre-emptively wrap the variable in a list, like so: prepend [$val]. This way, prepend will only unwrap the outer list, and leave the variable's contents untouched.