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                ### json字符串轉json對象 ``` let str = '{abc:123}' let json = evil(str) ``` ### 數據循環處理 ``` let data = [ {model:123}, {model:456}, {model:789} ] data.forEach(value => { console.log(value.model) }) //--------------------- var person = {fname:"Bill", lname:"Gates", age:62}; var text = ""; var x; for (x in person) { text += person[x]; } ``` ### @/libs/tools下的常用函數說明 #### forEach ~~~ let list = list: [ { a: 1, b: 2 }, { a: 3, b: 3 }, { a: 4, b: 4 }, { a: 5, b: 6 } ] forEach(list, function (item, i, arr) { console.log(item, i, arr) }) ~~~ #### getIntersection >* @param {Array} arr1 >* @param {Array} arr2 >* @description 得到兩個數組的交集, 兩個數組的元素為數值或字符串 ``` let list2=[1, 2, 3, 4, 5, 6] let list3=[1, 7, 9, 4, 5, 6] let newArr = getIntersection(list2, list3) console.log(newArr) //輸出 [1, 4, 5, 6] ``` #### getUnion >* @param {Array} arr1 >* @param {Array} arr2 >* @description得到兩個數組的并集, 兩個數組的元素為數值或字符串 ``` let list2=[1, 2, 3, 4, 5, 6] let list3=[1, 7, 9, 4, 5, 6] let newArr = getUnion(list2, list3) console.log(newArr) //輸出[1, 2, 3, 4, 5, 6, 7, 9] ``` ### oneOf > @param {String|Number} value 要驗證的字符串或數值 > @param {*} validList 用來驗證的列表 ``` let a = 20 let arr = [10,20,30,40] if ( oneOf(a, arr) === true) ``` ### hasKey > 判斷一個對象是否存在key,如果傳入第二個參數key,則是判斷這個obj對象是否存在key這個屬性 > 如果沒有傳入key這個參數,則判斷obj對象是否有鍵值對 ~~~ console.log(hasKey({ a: 1, b: 2, c: 3 }, 'a')) ~~~
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