codewar (1)

来源：互联网发布：mac查看环境变量编辑：程序博客网时间：2024/06/08 17:35

[1, 2, 3].all(isGreaterThanZero) => true
[-1, 0, 2].all(isGreaterThanZero) => false
[-1, 2, 3].none(isLessThanZero) => false
[-1, -2, -3].none(isGreaterThanZero) => true
[-1, 2, 3].any(isGreaterThanZero) => true
[-1, -2, -3].any(isGreaterThanZero) => false

Array.prototype.all = function (p) {  for(i = 0; i < this.length; i++) {    if(p(this[i]) !== true) {      return false;    }  }  return true;};Array.prototype.none = function (p) {  for(i = 0; i < this.length; i++) {    if(p(this[i]) !== false) {      return false;    }  }  return true;};Array.prototype.any = function (p) {  for(i = 0; i < this.length; i++) {    if(p(this[i]) !== false) {      return true;    }  }  return false;};

测试用例

function isGreaterThanZero (num) {  return num > 0;}function isLessThanZero (num) {  return num < 0;}Test.expect([1, 2, 3].all(isGreaterThanZero), 'All are greater than zero');Test.expect(![-1, 0, 2].all(isGreaterThanZero), 'One is less than zero');Test.expect(![-1, 2, 3].none(isLessThanZero), 'One is less than zero');Test.expect([-1, -2, -3].none(isGreaterThanZero), 'None are greater than zero');Test.expect([-1, 2, 3].any(isGreaterThanZero), 'Two are greater than zero');Test.expect(![-1, -2, -3].any(isGreaterThanZero), 'None are greater than zero');

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