[ADD] all

all/index.js

@@ -0,0 +1,8 @@
+module.exports = function all(iterable, predicator) {
+  for (const element of iterable) {
+    if (!predicator(element)) {
+      return false;
+    }
+  }
+  return true;
+}

index.js

@@ -1,3 +1,4 @@
+const all = require('./all');
 const andThen = require('./andThen');
 const compose = require('./compose');
 const filter = require('./filter');
@@ -9,8 +10,9 @@ const partition = require('./partition');
 const zip = require('./zip');
 
 module.exports = {
-  compose,
+  all,
   andThen,
+  compose,
   filter,
   foldLeft,
   foldRight,

test/all.test.js

@@ -0,0 +1,23 @@
+const assert = require('assert');
+const $ = require('../');
+
+describe('all test', () => {
+  const array = [1, 3, 5, 7, 9];
+  it('work with array', () => {
+    const result = $.all(array, (x) => x % 2 == 1);
+    assert.equal(result, true);
+  });
+  it('work with Set', () => {
+    const set = new Set(array);
+    const result = $.all(set, (x) => x % 2 == 0);
+    assert.equal(result, false);
+  });
+  it('work with Map', () => {
+    const map = new Map();
+    for (let i = 3; i <= 9; i++) {
+      map.set(i, i * 2);
+    }
+    const result = $.all(map, (x) => x[0] % 2 == 0);
+    assert.deepEqual(result, false);
+  });
+});