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Simplified values function with basic example #7

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Simplified values function with basic example #7

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754fb67
simplify and add basic example
dmitriz Apr 21, 2018
42a19ff
Rename for better readability
dmitriz Apr 21, 2018
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23 changes: 15 additions & 8 deletions pull.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,13 +12,19 @@ in pull-streams i like to call streams that data comes out of "sources",
(in node they are usually called readables)

*/
function values (ary) {
var i = 0
return function read(abort, cb) {
if(i===ary.length || abort) return cb(true)
cb(null, ary[i++])
}
}

const values = array => (abort, cb) => array.length
? cb(null, array.shift())
: cb(true)

const c = console.log
, stream = values([1,2,3])

c("Pulling data from the stream...")
stream(null, c)
stream(null, c)
stream(null, c)
stream(null, c)

/*

Expand Down Expand Up @@ -152,7 +158,8 @@ now we can pipe the infinite stream through this,
and it will stop after 101 items!
*/

pull(infinite(), mapper, take(101), sink)
c("Pulling from the infinite stream...")
pull(infinite(), mapper, take(10), sink)

/*
That covers 3 types of pull streams. Source, Transform, & Sink.
Expand Down