🏭 Generators¶
Unlike other filters, generator output is not produced from its input. However, it is still possible (although meaningless) to pipe input into a generator.
| Filter | Description |
|---|---|
*N:V |
Repeat N times V.Any other character than : can be also used as a delimiter. |
c |
Local counter |
C |
Global counter |
uA-B |
Random 64-bit number (A ≤ u ≤ B) |
uA- |
Random 64-bit number (A ≤ u) |
u |
Random 64-bit number |
U |
Random UUID |
Examples:
| Pattern | Output |
|---|---|
{*3:ab} |
ababab |
{c} |
(see below) |
{C} |
(see below) |
{u0-99} |
(random number between 0 and 99) |
{U} |
5eefc76d-0ca1-4631-8fd0-62eeb401c432 (random) |
- Global counter
Cis incremented for every input value. - Local counter
cis incremented per parent directory (assuming input value is a FS path). - Both counters start at 1 and are incremented by 1.
| Input | Global counter | Local counter |
|---|---|---|
A/1 |
1 | 1 |
A/2 |
2 | 2 |
B/1 |
3 | 1 |
B/2 |
4 | 2 |
- Use
-c, --local-counteroption to change local counter configuration. - Use
-C, --global-counteroption to change global counter configuration.
rew -c0 '{c}' # Start from 0, increment by 1
rew -c2:3 '{c}' # Start from 2, increment by 3