var R = require("../source/index.js");
var eq = require("./shared/eq.js");
var {Just} = require("./shared/Maybe.js");
describe("eqBy", function() {
it("determines whether two values map to the same value in the codomain", function() {
eq(R.eqBy(Math.abs, 5, 5), true);
eq(R.eqBy(Math.abs, 5, -5), true);
eq(R.eqBy(Math.abs, -5, 5), true);
eq(R.eqBy(Math.abs, -5, -5), true);
eq(R.eqBy(Math.abs, 42, 99), false);
});
it("has R.equals semantics", function() {
eq(R.eqBy(R.identity, 0, -0), false);
eq(R.eqBy(R.identity, -0, 0), false);
eq(R.eqBy(R.identity, NaN, NaN), true);
eq(R.eqBy(R.identity, new Just([42]), new Just([42])), true);
});
});
Related articles
var R = require("../source/index.js");
var eq = require("./shared/eq.js");
describe("splitWhenever", function() {
it("Splits an array into slices, whenever the predicate returns true", function() {
eq(R.splitWhenever(R.equals(2), [1, 2, 3, 2, 4,
var R = require("../source/index.js");
var eq = require("./shared/eq.js");
describe("splitAt", function() {
it("splits an array at a given index", function() {
eq(R.splitAt(1, [1, 2, 3]), [[1], [2, 3]]);
});
it("splits a string at a given in
var assert = require("assert");
var R = require("../source/index.js");
var eq = require("./shared/eq.js");
describe("mergeDeepWith", function() {
function last(x, y) { return y; }
it("takes two objects, recursively merges their own properties and
var R = require("../source/index.js");
var eq = require("./shared/eq.js");
describe("zipObj", function() {
it("combines an array of keys with an array of values into a single object", function() {
eq(R.zipObj(["a", "b", "c"], [1, 2, 3]), {a: 1, b
var R = require("../source/index.js");
var eq = require("./shared/eq.js");
describe("juxt", function() {
function hello() { return "hello"; }
function bye() { return "bye"; }
it("works with no functions and no values", function() {
eq(R.juxt
var R = require("../source/index.js");
var eq = require("./shared/eq.js");
describe("nthArg", function() {
it("returns a function which returns its nth argument", function() {
eq(R.nthArg(0)("foo", "bar"), "foo");
eq(R.nthArg(1)("foo", "bar")
var R = require("../source/index.js");
var eq = require("./shared/eq.js");
describe("dec", function() {
it("decrements its argument", function() {
eq(R.dec(-1), -2);
eq(R.dec(0), -1);
eq(R.dec(1), 0);
eq(R.dec(12.34), 11.34);
eq(
var assert = require("assert");var fs = require("fs");var R = require("../source/index.js");var dox = require("dox");// simple object to hold info about our examplesfunction ExampleTest(dox_info, original_source, alias_of) { this.func_name = this
var R = require("../source/index.js");
var eq = require("./shared/eq.js");
var testObj = {
a: [{
b: 1
}, {
b: 2
}],
d: 3
};
describe("lensPath", function() {
describe("view", function() {
it("focuses the specified object property
var R = require("../source/index.js");
var eq = require("./shared/eq.js");
describe("unfold", function() {
it("unfolds simple functions with a starting point to create a list", function() {
eq(R.unfold(function(n) {if (n > 0) {return [n, n - 1];}