如何在jQuery中拒絕JSON密鑰？

Question

我有這個JSON負載，我想在幾個地方使用它，並想知道如何從這個拒絕兩個鍵。

@metaTagsAdvanced = { 
    App: { comparison: ['was', 'was not'], value: ['Opened in the last two days', 'Opened in the last two weeks', 'Opened in the last month'], enabled: true }, 
    AppVersion: { comparison: ['equals', 'not equal', 'greater than', 'less than', 'greater than or equal', 'less than or equal'], value: 'string', enabled: true }, 
    ControlGroup: { comparison: ['less than', 'less than or equal', 'greater than', 'greater than or equal', 'equals'], value: 'number', numberOptions: {min: 1, max: 10}, enabled: true }, 
    Country: { comparison: ['is', 'is not'], value: 'country', enabled: true }, 
    Deliverable: { comparison: ['is', 'is not'], value: ['Push Notification','Local Push Notification', 'App Originated Push', 'In-App Alert', 'In-App Content', 'SMS', 'MMS', 'Email', 'Rich Message'], enabled: true }, 
    Event: {comparison: {eventNumber: ['did occur N days ago', 'did occur greater than N days ago','did occur greater than or equal to N days ago','did occur less than N days ago','did occur less than or equal to N days ago', 'did not occur N days ago','did not occur greater than N days ago','did not occur greater than or equal to N days ago','did not occur less than N days ago','did not occur less than or equal to N days ago'], standards: ['did occur', 'did not occur']}, value: 'events', enabled: true}, 
    InstallDate: { comparison: ['before', 'was', 'after', 'within', 'days ago', 'greater than N days ago', 'greater than or equal to N days ago','less than N days ago', 'less than or equal to N days ago'], value: 'date', enabled: true }, 
    Language: { comparison: ['is', 'is not'], value: 'language', enabled: true }, 
    LastOpenDate: { comparison: ['before', 'was', 'after', 'within', 'N days ago', 'greater than N days ago', 'greater than or equal to N days ago', 'less than N days ago', 'less than or equal to N days ago'], value: 'date', enabled: true }, 
    OS: { comparison: ['is', 'is not'], value: ['android', 'ios'], enabled: true }, 
    PushOpenRate: { comparison: ['greater than or equal', 'less than or equal'], value: ['0', '0.1', '0.2', '0.3', '0.4', '0.5', '0.6', '0.7', '0.8', '0.9', '1'], enabled: true }, 
    Segment: {comparison: ['is in'], value: 'segments', enabled: true}, 
    Sessions: { comparison: ['less than', 'greater than'], value: 'number', numberOptions: {min: 1}, enabled: true }, 
    Tag: {comparison: {string: ['is', 'is not', 'contains'], double: ['equals', 'not equal to', 'less than', 'greater than', 'less than or equal', 'greater than or equal'], timestamp: ['before', 'after', 'was', 'within', 'N days ago', 'greater than N days ago', 'greater than or equal to N days ago','less than N days ago','less than or equal to N days ago'], segment: ['is in', 'is not in'], standard: ['exists', 'does not exist']}, value: 'tags', enabled: true}, 
    Timezone: {comparison: ['is', 'is not'], value: 'timezone', enabled: true} 
} 

所以我想插入實例，如下所示。但是，我怎麼能改變這段代碼來拒絕/排除上面的'Segment'和'Timezone'鍵？

filters = $.extend({}, @metaTagsAdvanced) 

任何與此有關的幫助將不勝感激，因爲它可以讓我顯着重構我的一些代碼！ （我用的CoffeeScript，因此爲什麼它的格式事情是這樣的！）

乾杯

Answer 1

我會使用一個實用程序庫像lodash或強調，會比這個解決方案的更多強大的，但你可以做像這樣的東西，如果你不想依賴Array上的原生原型方法。間歇性日誌語句顯示它如何建立。

的jsfiddle這裏：http://jsfiddle.net/TRqG8/

jQuery的只有

someTags = 
    Foo: {foo: 'bar'} 
    Bar: {foo: 'bar'} 
    Baz: {foo: 'bar'} 

_keys = (obj)-> $.map(obj, (value, key)-> key) # seems odd that key is last but that appears to be the way jQuery 2.1.0 works. 

console.log _keys(someTags) # => ["Foo", "Bar", "Baz"] 

_in = (arr, key)-> arr.indexOf(key) != -1 

console.log _in(_keys(someTags), 'Foo') #=> true 

# there is a native filter function for Array.prototype 
_filter = (obj, keys...)-> 
    objKeys = _keys(obj) 
    # a poor man's reduce 
    ob = {} 
    for k in objKeys 
    ob[k] = obj[k] unless _in(keys, k) 
    ob 

console.log _filter(someTags, 'Bar') #=> Object {Foo: Object, Baz: Object} 

console.log $.extend({}, _filter(someTags, 'Bar', 'Baz')) #=> Object {Foo: Object} 

下劃線

相比之下，使用下劃線，你可以做這樣的事情：

someTags = 
    Foo: {foo: 'bar'} 
    Bar: {foo: 'bar'} 
    Baz: {foo: 'bar'} 

console.log _.extend({}, _.omit(someTags, 'Bar')) 

的jsfiddle：http://jsfiddle.net/nUSM8/1/