
Research
/Security News
Toptal’s GitHub Organization Hijacked: 10 Malicious Packages Published
Threat actors hijacked Toptal’s GitHub org, publishing npm packages with malicious payloads that steal tokens and attempt to wipe victim systems.
Simple and
and or
functional programming predicates.
and(...fs): (...args): boolean
- Returns a predicate that returns true if all arguments are true or evaluate to true for the given input.or(...fs): (...args): boolean
- Returns a predicate that returns true if at least one argument is true or evaluates to true for the given input.A predicate is a function that returns a boolean
, commonly used in Array.prototype.filter
.
e.g.
const isEven = n => n%2 === 0
const isPositive = n => n > 0
// un-fancy
items.filter(x => isEven(x) || isPositive(x))
// fancy
items.filter(or(isEven, isPositive))
npm install --save fp-and-or
const { and, or } = require('fp-and-or')
const isEven = n => n % 2 === 0
const isPositive = n => n > 0
const isBig = n => Math.abs(n) >= 1000
and()(1) // true
and(isEven)(1) // false
and(isEven)(2) // true
and(isEven, isPositive)(-2) // false
and(isEven, isPositive)(-1) // false
and(isEven, isPositive)(1) // false
and(isEven, isPositive)(2) // true
and(isEven, isPositive, isBig)(-2) // false
and(isEven, isPositive, isBig)(-1) // false
and(isEven, isPositive, isBig)(1) // false
and(isEven, isPositive, isBig)(2) // false
and(isEven, isPositive, isBig)(-1002) // false
and(isEven, isPositive, isBig)(-1001) // false
and(isEven, isPositive, isBig)(1001) // false
and(isEven, isPositive, isBig)(1002) // true
and(true)(1) // true
and(false)(1) // false
and(false, false)(1) // false
and(false, true)(1) // false
and(true, false)(1) // false
and(true, true)(1) // true
and(false, false, false)(1) // false
and(false, true, false)(1) // false
and(true, false, false)(1) // false
and(true, true, false)(1) // false
and(false, false, true)(1) // false
and(false, true, true)(1) // false
and(true, false, true)(1) // false
and(true, true, true)(1) // true
and(false, isEven)(1) // false
and(false, isEven)(2) // false
and(true, isEven)(1) // false
and(true, isEven)(2) // true
and(isEven, false)(1) // false
and(isEven, false)(2) // false
and(isEven, true)(1) // false
and(isEven, true)(2) // true
or()(1) // false
or(isEven)(1) // false
or(isEven)(2) // true
or(isEven, isPositive)(-2) // true
or(isEven, isPositive)(-1) // false
or(isEven, isPositive)(1) // true
or(isEven, isPositive)(2) // true
or(isEven, isPositive, isBig)(-2) // true
or(isEven, isPositive, isBig)(-1) // false
or(isEven, isPositive, isBig)(0) // true
or(isEven, isPositive, isBig)(1) // true
or(isEven, isPositive, isBig)(2) // true
or(isEven, isPositive, isBig)(-1002) // true
or(isEven, isPositive, isBig)(-1001) // true
or(isEven, isPositive, isBig)(1001) // true
or(isEven, isPositive, isBig)(1002) // true
or(true)(1) // true
or(false)(1) // false
or(false, false)(1) // false
or(false, true)(1) // true
or(true, false)(1) // true
or(true, true)(1) // true
or(false, false, false)(1) // false
or(false, true, false)(1) // true
or(true, false, false)(1) // true
or(true, true, false)(1) // true
or(false, false, true)(1) // true
or(false, true, true)(1) // true
or(true, false, true)(1) // true
or(true, true, true)(1) // true
or(false, isEven)(1) // false
or(false, isEven)(2) // true
or(true, isEven)(1) // true
or(true, isEven)(2) // true
or(isEven, false)(1) // false
or(isEven, false)(2) // true
or(isEven, true)(1) // true
or(isEven, true)(2) // true
FAQs
Simple `and` and `or` functional programming predicates
The npm package fp-and-or receives a total of 149,011 weekly downloads. As such, fp-and-or popularity was classified as popular.
We found that fp-and-or demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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