pipeline

Written as pipeline(argnum flags):options in a transform expression.

Minimum arguments	-1
Maximum arguments	no limit
Default arguments	0
Argument modes	SINGLE, MULTIPLE

Documentation

Process a pipeline of mixed transform expressions and arguments.

This transform applies a sequence of nested transforms and arguments to input data.

Notes:

• First argument is always the input value
• Flag stop_on_empty to terminate pipeline early on empty results
• Flag output_all to output both stack and pipeline last step result. By default, only pipeline’s last step result is output.

Flags

Flag	Letter
spread_input	s
spread_output	S
noncaptive_input	I
arg_num_flexible	f
stop_on_empty	e
output_all	a

Examples

Zero arg pipeline

Input args: []
Transforms: "pipeline(*):[\"a\", \"b\", \"join(2):\n\", \"c\", \"join(*):.\"]"
Output: "a\nb.c"

One arg as input for transform pipeline with mixed args and transform exprs

Input args: ["a"]
Transforms: "pipeline:[\"b\", \"join(2):\n\", \"c\", \"join(*):.\"]"
Output: "a\nb.c"

pipeline transform with Early-stop-on-empty flag on

Input args: ["abc","xyz"]
Transforms: "pipeline(*e):[\"regex:w\", \"hello\", \"join(*): \"]"
Output: null

Special implicit pipeline transform without the pipepline: prefix

Input args: [{"content":"<sitemapindex xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\"><sitemap><loc>https://www.jbhifi.com.au/sitemap_productsd_1.xml?from=1614264664162&amp;to=1620533543010</loc></sitemap><sitemap><loc>https://www.jbhifi.com.au/sitemap_products_2.xml?fromdd=1620533575778&amp;to=1625088262242</loc></sitemap></sitemapindex>"}]
Transforms: ["keypath:content","xpath3(N)://sitemap/loc[contains(text(), \"_products\")]/text()"]
Output: ["https://www.jbhifi.com.au/sitemap_productsd_1.xml?from=1614264664162&to=1620533543010","https://www.jbhifi.com.au/sitemap_products_2.xml?fromdd=1620533575778&to=1625088262242"]