Javascript 通过匹配输入来过滤字符串？

Question

逐字符过滤字符串列表的最有效方法是什么？

var term = "Mike";
angular.forEach($scope.contacts, function(contact, key) {

    // if I had the whole term and 
    // contact.name == Mike then this is true
    contact.name == term;

});

上面的内容没问题，但如果我要构建搜索，我该如何逐个字符地过滤？

var term = "Mi";
angular.forEach($scope.contacts, function(contact, key) {

    // contact.name == Mike, but term == Mi how can I get this to return true?
    contact.name == term;

});

Answer 1

使用indexOf

var term = "Mi";
angular.forEach($scope.contacts, function(contact, key) {

    // contact.name == Mike, but term == Mi how can I get this to return true?
    contact.name.indexOf(term) > -1;

});

如果你想要不区分大小写的测试，你可以这样做

    var term = "Mi";
    var regex = new RegExp(term, 'i');

    angular.forEach($scope.contacts, function(contact, key) {

        // contact.name == Mike, but term == Mi how can I get this to return true?
        regex.test(contact.name);

    });