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feat(Chain): add computation pipelines like mathjs

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Also adds a `mean()` operation so there will be at least one operation
  that takes only a rest parameter, to exercise the ban on splitting
  such a parameter between the stored value and new arguments.
  Adds various tests of chains.

  Resolves #32.
This commit is contained in:
Glen Whitney 2022-08-01 16:24:20 -07:00
parent 46ae7f78ab
commit 814f660000
7 changed files with 100 additions and 14 deletions
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8
src/core/PocomathInstance.mjs
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@ -1,6 +1,7 @@
/* Core of pocomath: create an instance */
import typed from 'typed-function'
import dependencyExtractor from './dependencyExtractor.mjs'
import {makeChain} from './Chain.mjs'
import {subsetOfKeys, typesOfSignature} from './utils.mjs'
const anySpec = {} // fixed dummy specification of 'any' type
@ -21,6 +22,7 @@ export default class PocomathInstance {
* must be added to this list.
*/
static reserved = new Set([
'chain',
'config',
'importDependencies',
'install',
@ -64,6 +66,7 @@ export default class PocomathInstance {
return true // successful
}
})
this._chainRepository = {} // place to store chainified functions
}
/**
@ -164,6 +167,11 @@ export default class PocomathInstance {
return result
}
/* Return a chain object for this instance with a given value: */
chain(value) {
return makeChain(value, this, this._chainRepository)
}
_installInstance(other) {
for (const [type, spec] of Object.entries(other.Types)) {
if (type === 'any' || this._templateParam(type)) continue