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Javascript 使用u.curry的函数无法按预期工作_Javascript_Currying_Lodash - Fatal编程技术网

Javascript 使用u.curry的函数无法按预期工作

Javascript 使用u.curry的函数无法按预期工作,javascript,currying,lodash,Javascript,Currying,Lodash,我制作了一个函数,用它检查userRequest数组中的所有元素是否都在whitelist数组中 实施计划如下: var isValidRequest = function (whitelist, userRequest) { return _.isArray(userRequest) && _.all(userRequest, _.curry(_.contains)(whitelist)); }; 并进行了一些测试以证明功能正常工作: describe('#isValid

我制作了一个函数,用它检查
userRequest
数组中的所有元素是否都在
whitelist
数组中

实施计划如下:

var isValidRequest = function (whitelist, userRequest) {
  return _.isArray(userRequest) && _.all(userRequest, _.curry(_.contains)(whitelist));
};
并进行了一些测试以证明功能正常工作:

describe('#isValidRequest', function () {
  it('should return true if all elements in userRequest are in whitelist', function () {
    var whitelist = ['a', 'b', 'c'];
    var userRequest = ['a', 'c'];
    isValidRequest(whitelist, userRequest).should.eql(true);
  });

  it('should return false if any element in userRequest are not in whitelist', function () {
    var whitelist = ['a', 'b', 'c'];
    var userRequest = ['a', 'd'];
    isValidRequest(whitelist, userRequest).should.eql(false);
  });
}
这两项测试都通过了。但当我添加一个使用真实数据的测试时,它失败了:

it('should return true if all elements in userRequest are in whitelist (with real data)', function () {
  var whitelist = [
    '88096706899774400',
    '88096698426400385',
    '88354827595032721',
    '88770059167850369',
    '88770060663799793',
    '88770086312254177',
    '88775479126833601',
    '88810673591548449',
    '88911136544698224',
    '88911143320755648',
    '89018389627510081',
    '89091351154758240',
    '89138464836818065',
    '89183114982564704',
    '89244113023388657',
    '89295369695148528',
    '89301959129114097',
    '89504545841807728',
    '89534114665094448',
    '89606610296086240',
    '89641336900131600',
    '89731870992552785',
    '89738745919815345',
    '89823303352910497',
    '89840086806894128',
    '89845003632280944',
    '89848539122007344',
    '89880345515638625',
    '89896204194964448',
    '89969897520284480',
    '90010241312333393',
    '90031501817339552',
    '90037811665186016',
    '90127246523802417',
    '90127326629435841',
    '90135603990132225',
    '90163753341695809',
    '90172844493692480',
    '90173968277693249',
    '90207288890460865',
    '90246427557475376',
    '90252073971668320',
    '90293572470161952',
    '90321398525152736',
    '90327469987102145',
    '90332817802308640',
    '90399158195724752',
    '90473400215028352',
    '90513809810131312',
    '90598738792526944',
    '90599866499311776',
    '90688910073135297',
    '90729048447052800',
    '90791709927640224',
    '90797430150059264',
    '90836502447169952',
    '90840789211604048',
    '90910679553135265',
    '90955553467111249',
    '91005194750034464',
    '91107097130270400',
    '91120121727188609',
    '91250514358592672',
    '91329569249288769',
    '91361847043080400',
    '89329608853128288',
    '89364936821344896',
    '89839796561904929',
    '89958125601566961',
    '89997339418747777',
    '90009609130378257',
    '90059530916627969',
    '90258899387578336',
    '90360966983802448',
    '90576680708221921',
    '90949316113004816',
    '90972311574832433',
    '91080503304847328',
    '91353087352736736',
    '91437504999287200',
    '89222620849510145',
    '91005234554242641',
    '88701724462867649',
    '88786970344150112',
    '89981796966546737',
    '91402887254828368',
    '89409996620502544',
    '91210948485412928',
    '89018361177929809',
    '90724949851032945',
    '90829728879723920',
    '91193135505078640',
    '90019861140866640',
    '89538475013487072',
    '89860038384233984',
    '91210548905645393',
    '89308012820785888',
    '89617667142643760',
    '89607245310211489',
    '90757935350815969',
    '89860541244171121',
    '90892725971526912',
    '90886830738859280',
    '90853461057266320',
    '90806805288251792',
    '90472888904266304',
    '89824038902302577',
    '90135219888606641',
    '91029359883680448',
    '90434994851785744',
    '90333231764534192',
    '90529509422642336',
    '90529639828432736',
    '91357318422536304'
  ];
  var userRequest = [
    '88096698426400385',
    '88096706899774400',
    '88354827595032721',
    '88770059167850369',
    '88770060663799793',
    '88770086312254177',
    '88775479126833601',
    '88810673591548449',
    '88911136544698224',
    '88911143320755648',
    '89018389627510081',
    '89091351154758240',
    '89138464836818065',
    '89183114982564704',
    '89244113023388657',
    '89295369695148528',
    '89301959129114097',
    '89504545841807728',
    '89534114665094448',
    '89606610296086240',
    '89641336900131600',
    '89731870992552785',
    '89738745919815345',
    '89823303352910497',
    '89840086806894128',
    '89845003632280944',
    '89848539122007344',
    '89880345515638625',
    '89896204194964448',
    '89969897520284480',
    '90010241312333393',
    '90031501817339552',
    '90037811665186016',
    '90127246523802417',
    '90127326629435841',
    '90135603990132225',
    '90163753341695809',
    '90172844493692480',
    '90173968277693249',
    '90207288890460865',
    '90246427557475376',
    '90252073971668320',
    '90293572470161952',
    '90321398525152736',
    '90327469987102145',
    '90332817802308640',
    '90399158195724752',
    '90473400215028352',
    '90513809810131312',
    '90598738792526944',
    '90599866499311776',
    '90688910073135297',
    '90729048447052800',
    '90791709927640224',
    '90797430150059264',
    '90836502447169952',
    '90840789211604048',
    '90910679553135265',
    '90955553467111249',
    '91005194750034464',
    '91107097130270400',
    '91120121727188609',
    '91250514358592672',
    '91329569249288769',
    '91361847043080400'
  ];

  isValidRequest(whitelist, userRequest).should.eql(true);
});
数据大小增加了(
userRequest
:3->114,
userRequest
:2->65),我验证了
userRequest
中的所有元素都在
whitelist
中。所以测试应该通过,但失败了

我制作了一个工作原理完全相同但实现方式不同的函数:

var isValidRequest2 = function (whitelist, userRequest) {
  return _.isArray(userRequest) && _.all(userRequest, function(elem) { return _.contains(whitelist, elem); });
};
有了这个新函数,所有测试都通过了

在Chorme开发工具的控制台中,同样的事情也会发生:

> _.all(userRequest, _.curry(_.contains)(whitelist))
  false
> _.all(userRequest, function(elem) { return _.contains(whitelist, elem); })
  true
我想这有点问题,但不确定

如果有人用
\uu.curry
解释第一个函数的问题,那就太好了


仅供参考,我使用的是lodash v2.4.1。

\u所有调用
迭代器(第二个参数)都带有附加参数

_.all([1, 2, 3], function () { console.log(arguments); return true; });
[1, 0, Array[3]]
[2, 1, Array[3]]
[3, 2, Array[3]]
true
.contains
有一个可选的第三个参数,
fromIndex
,它与
.all
给出的索引相匹配。因此,真实数据会中断

尝试在基本测试中对元素重新排序,您将看到事实

isValidRequest(['a', 'b', 'c'], ['a', 'c']) // true
isValidRequest(['a', 'b', 'c'], ['c', 'a']) // false

谢谢你明确的回答。顺便说一句,
的第三个参数是回调的
绑定。我可以通过使用第三个参数如
.all(userRequest、\u0.curry(\u0.contains)(白名单)、firstargument)获得想要的结果吗?