比較兩個數組並找到使用javascript的每個值count

我有兩個數組。這個是我的數組。比較兩個數組並找到使用javascript的每個值count

var arr=[ 
"08-01-2017", 
"07-31-2017", 
"07-30-2017", 
"07-29-2017", 
"07-28-2017", 
"07-27-2017", 
"07-26-2017"]

這裏是另一個數組

var arr1= [ 
     { 
     "HOST": "", 
     "U_ID": "", 
     "PATH": "Home", 
     "REFERER": "", 
     "AGENT": "", 
     "OS": "", 
     "DATE_TIME": "2017-07-31T05:44:06.743Z", 
     "S_ID": "80067826-0cad-4806-b40e-8e5d8be18e53", 
     "C_ID": "", 
     "C_NAME": "", 
     "P_ID": "", 
     "P_NAME": "", 
     "CART_ID": "", 
     "O_ID": "", 
     "id": "597c20a636c81d38dc77c626" 
     }, 
     { 
     "HOST": "", 
     "U_ID": "", 
     "PATH": "ProductlistPage", 
     "REFERER": "Home", 
     "AGENT": "", 
     "OS": "", 
     "DATE_TIME": "2017-07-30T05:44:22.425Z", 
     "S_ID": "7fe1795a-5064-43d7-9a62-48b0f156a2c3", 
     "C_ID": "1", 
     "C_NAME": "Sparklers", 
     "P_ID": "", 
     "P_NAME": "", 
     "CART_ID": "", 
     "O_ID": "", 
     "id": "597c20b636c81d38dc77c627" 
     }, 
     { 
     "HOST": "", 
     "U_ID": "", 
     "PATH": "ProductlistPage", 
     "REFERER": "Home", 
     "AGENT": "", 
     "OS": "", 
     "DATE_TIME": "2017-07-29T05:45:25.064Z", 
     "S_ID": "439667fe-ab24-4bf6-959e-152a4f631fe3", 
     "C_ID": "595f40038c4d19b50ac21b98", 
     "C_NAME": "Sparklers", 
     "P_ID": "", 
     "P_NAME": "", 
     "CART_ID": "", 
     "O_ID": "", 
     "id": "597c20f536c81d38dc77c628" 
     }, 
     { 
     "HOST": "", 
     "U_ID": "", 
     "PATH": "ProductdetailsPage", 
     "REFERER": "ProductlistPage", 
     "AGENT": "", 
     "OS": "", 
     "DATE_TIME": "2017-07-29T05:45:39.047Z", 
     "S_ID": "a21c273a-372e-4a81-9997-d468d5efd299", 
     "C_ID": "1", 
     "C_NAME": "Sparklers", 
     "P_ID": "595f3e418c4d19b50ac21b84", 
     "P_NAME": "Martina", 
     "CART_ID": "", 
     "O_ID": "", 
     "id": "597c210236c81d38dc77c629" 
     }, 
     { 
     "HOST": "", 
     "U_ID": "", 
     "PATH": "Home", 
     "REFERER": "", 
     "AGENT": "", 
     "OS": "", 
     "DATE_TIME": "2017-07-28T05:47:15.604Z", 
     "S_ID": "a4278659-8053-45fd-8a95-78766fd7541b", 
     "C_ID": "", 
     "C_NAME": "", 
     "P_ID": "", 
     "P_NAME": "", 
     "CART_ID": "", 
     "O_ID": "", 
     "id": "597c216336c81d38dc77c62a" 
     }, 
     { 
     "HOST": "", 
     "U_ID": "", 
     "PATH": "ProductlistPage", 
     "REFERER": "Home", 
     "AGENT": "", 
     "OS": "", 
     "DATE_TIME": "2017-07-27T05:47:22.700Z", 
     "S_ID": "874bb326-ab02-4061-a029-bef5977d4c65", 
     "C_ID": "595f40038c4d19b50ac21b98", 
     "C_NAME": "Sparklers", 
     "P_ID": "", 
     "P_NAME": "", 
     "CART_ID": "", 
     "O_ID": "", 
     "id": "597c216b36c81d38dc77c62b" 
     }, 
     { 
     "HOST": "", 
     "U_ID": "", 
     "PATH": "CartPage", 
     "REFERER": "ProductlistPage", 
     "AGENT": "", 
     "OS": "", 
     "DATE_TIME": "2017-07-27T05:47:25.758Z", 
     "S_ID": "dd9096f9-79ea-4d86-81ce-149e364ab1ed", 
     "C_ID": "1", 
     "C_NAME": "Sparklers", 
     "P_ID": "", 
     "P_NAME": "", 
     "CART_ID": "", 
     "O_ID": "", 
     "id": "597c216d36c81d38dc77c62c" 
     }, 
     { 
     "HOST": "", 
     "U_ID": "", 
     "PATH": "ProductdetailsPage", 
     "REFERER": "ProductlistPage", 
     "AGENT": "", 
     "OS": "", 
     "DATE_TIME": "2017-07-29T05:47:42.047Z", 
     "S_ID": "4ed84c84-80ec-4494-9ffe-453f19e2c079", 
     "C_ID": "1", 
     "P_ID": "595f3e418c4d19b50ac21b84", 
     "P_NAME": "Martina", 
     "CART_ID": "", 
     "O_ID": "", 
     "id": "597c217d36c81d38dc77c62d" 
     }, 
     { 
     "HOST": "", 
     "U_ID": "", 
     "PATH": "CartPage", 
     "REFERER": "ProductdetailsPage", 
     "AGENT": "", 
     "OS": "", 
     "DATE_TIME": "2017-07-29T05:47:45.174Z", 
     "S_ID": "91153a97-d79e-4d86-9872-5df51bd7e82f", 
     "C_ID": "1", 
     "P_ID": "595f3e418c4d19b50ac21b84", 
     "P_NAME": "Martina", 
     "CART_ID": "", 
     "O_ID": "", 
     "id": "597c218136c81d38dc77c62e" 
     }, 
     { 
     "HOST": "", 
     "U_ID": "59687ee6cd62a604e2bb0d1f", 
     "PATH": "CustomershippingPage", 
     "REFERER": "cartPage", 
     "AGENT": "", 
     "OS": "", 
     "DATE_TIME": "2017-07-29T05:48:20.386Z", 
     "S_ID": "46866f41-9f43-4d28-a602-490db68dc029", 
     "C_ID": "", 
     "C_NAME": "", 
     "P_ID": "", 
     "P_NAME": "", 
     "CART_ID": "597c21a336c81d38dc77c62f", 
     "O_ID": "", 
     "id": "597c21a436c81d38dc77c630" 
     }, 
     { 
     "HOST": "", 
     "U_ID": "59687ee6cd62a604e2bb0d1f", 
     "PATH": "customerpayment", 
     "REFERER": "CustomershippingPage", 
     "AGENT": "", 
     "OS": "", 
     "DATE_TIME": "2017-01-08T05:48:46.356Z", 
     "S_ID": "56ad3bd7-854b-42e9-8443-46c514eb2ece", 
     "C_ID": "", 
     "C_NAME": "", 
     "P_ID": "", 
     "P_NAME": "", 
     "CART_ID": "597c21a336c81d38dc77c62f", 
     "O_ID": "", 
     "id": "597c21be36c81d38dc77c631" 
     } 
    ]

我需要比較兩個arrays.find匹配值和另算。

例arr是date.Compare的列表基於DATE_TIME

08-01-2017所述另一陣列arr1重複一次。和07-29-2017重複五次。

我需要這個輸出

08-01-2017 - 2 <- Count(How many times repeated) 
07-29-2017 - 5 
07-28-2017 - 3 etc..

每個（ARR）值是重複了多少遍。

我不知道。

請諮詢我，

感謝

來源

2017-08-01 vaishu ani

你所預期的輸出？這個？ [{d：08-01-2017，c：2}，[{d：01-01-2010，c：0}，...] – Vitalii

陣列中的日期格式不相同。 8-1-2017在arr1中不會出現，如果你解析所有的人 – baao

您可以從ISO日期中提取出來的日期，然後用戶陣列＃減少和陣列＃過濾器來計算出現的次數。

const arr=["08-01-2017","07-31-2017","07-30-2017","07-29-2017","07-28-2017","07-27-2017","07-26-2017"]; 
 
const arr1= [ 
 
     { 
 
     "HOST": "", 
 
     "U_ID": "", 
 
     "PATH": "Home", 
 
     "REFERER": "", 
 
     "AGENT": "", 
 
     "OS": "", 
 
     "DATE_TIME": "2017-07-31T05:44:06.743Z", 
 
     "S_ID": "80067826-0cad-4806-b40e-8e5d8be18e53", 
 
     "C_ID": "", 
 
     "C_NAME": "", 
 
     "P_ID": "", 
 
     "P_NAME": "", 
 
     "CART_ID": "", 
 
     "O_ID": "", 
 
     "id": "597c20a636c81d38dc77c626" 
 
     }, 
 
     { 
 
     "HOST": "", 
 
     "U_ID": "", 
 
     "PATH": "ProductlistPage", 
 
     "REFERER": "Home", 
 
     "AGENT": "", 
 
     "OS": "", 
 
     "DATE_TIME": "2017-07-30T05:44:22.425Z", 
 
     "S_ID": "7fe1795a-5064-43d7-9a62-48b0f156a2c3", 
 
     "C_ID": "1", 
 
     "C_NAME": "Sparklers", 
 
     "P_ID": "", 
 
     "P_NAME": "", 
 
     "CART_ID": "", 
 
     "O_ID": "", 
 
     "id": "597c20b636c81d38dc77c627" 
 
     }, 
 
     { 
 
     "HOST": "", 
 
     "U_ID": "", 
 
     "PATH": "ProductlistPage", 
 
     "REFERER": "Home", 
 
     "AGENT": "", 
 
     "OS": "", 
 
     "DATE_TIME": "2017-07-29T05:45:25.064Z", 
 
     "S_ID": "439667fe-ab24-4bf6-959e-152a4f631fe3", 
 
     "C_ID": "595f40038c4d19b50ac21b98", 
 
     "C_NAME": "Sparklers", 
 
     "P_ID": "", 
 
     "P_NAME": "", 
 
     "CART_ID": "", 
 
     "O_ID": "", 
 
     "id": "597c20f536c81d38dc77c628" 
 
     }, 
 
     { 
 
     "HOST": "", 
 
     "U_ID": "", 
 
     "PATH": "ProductdetailsPage", 
 
     "REFERER": "ProductlistPage", 
 
     "AGENT": "", 
 
     "OS": "", 
 
     "DATE_TIME": "2017-07-29T05:45:39.047Z", 
 
     "S_ID": "a21c273a-372e-4a81-9997-d468d5efd299", 
 
     "C_ID": "1", 
 
     "C_NAME": "Sparklers", 
 
     "P_ID": "595f3e418c4d19b50ac21b84", 
 
     "P_NAME": "Martina", 
 
     "CART_ID": "", 
 
     "O_ID": "", 
 
     "id": "597c210236c81d38dc77c629" 
 
     }, 
 
     { 
 
     "HOST": "", 
 
     "U_ID": "", 
 
     "PATH": "Home", 
 
     "REFERER": "", 
 
     "AGENT": "", 
 
     "OS": "", 
 
     "DATE_TIME": "2017-07-28T05:47:15.604Z", 
 
     "S_ID": "a4278659-8053-45fd-8a95-78766fd7541b", 
 
     "C_ID": "", 
 
     "C_NAME": "", 
 
     "P_ID": "", 
 
     "P_NAME": "", 
 
     "CART_ID": "", 
 
     "O_ID": "", 
 
     "id": "597c216336c81d38dc77c62a" 
 
     }, 
 
     { 
 
     "HOST": "", 
 
     "U_ID": "", 
 
     "PATH": "ProductlistPage", 
 
     "REFERER": "Home", 
 
     "AGENT": "", 
 
     "OS": "", 
 
     "DATE_TIME": "2017-07-27T05:47:22.700Z", 
 
     "S_ID": "874bb326-ab02-4061-a029-bef5977d4c65", 
 
     "C_ID": "595f40038c4d19b50ac21b98", 
 
     "C_NAME": "Sparklers", 
 
     "P_ID": "", 
 
     "P_NAME": "", 
 
     "CART_ID": "", 
 
     "O_ID": "", 
 
     "id": "597c216b36c81d38dc77c62b" 
 
     }, 
 
     { 
 
     "HOST": "", 
 
     "U_ID": "", 
 
     "PATH": "CartPage", 
 
     "REFERER": "ProductlistPage", 
 
     "AGENT": "", 
 
     "OS": "", 
 
     "DATE_TIME": "2017-07-27T05:47:25.758Z", 
 
     "S_ID": "dd9096f9-79ea-4d86-81ce-149e364ab1ed", 
 
     "C_ID": "1", 
 
     "C_NAME": "Sparklers", 
 
     "P_ID": "", 
 
     "P_NAME": "", 
 
     "CART_ID": "", 
 
     "O_ID": "", 
 
     "id": "597c216d36c81d38dc77c62c" 
 
     }, 
 
     { 
 
     "HOST": "", 
 
     "U_ID": "", 
 
     "PATH": "ProductdetailsPage", 
 
     "REFERER": "ProductlistPage", 
 
     "AGENT": "", 
 
     "OS": "", 
 
     "DATE_TIME": "2017-07-29T05:47:42.047Z", 
 
     "S_ID": "4ed84c84-80ec-4494-9ffe-453f19e2c079", 
 
     "C_ID": "1", 
 
     "P_ID": "595f3e418c4d19b50ac21b84", 
 
     "P_NAME": "Martina", 
 
     "CART_ID": "", 
 
     "O_ID": "", 
 
     "id": "597c217d36c81d38dc77c62d" 
 
     }, 
 
     { 
 
     "HOST": "", 
 
     "U_ID": "", 
 
     "PATH": "CartPage", 
 
     "REFERER": "ProductdetailsPage", 
 
     "AGENT": "", 
 
     "OS": "", 
 
     "DATE_TIME": "2017-07-29T05:47:45.174Z", 
 
     "S_ID": "91153a97-d79e-4d86-9872-5df51bd7e82f", 
 
     "C_ID": "1", 
 
     "P_ID": "595f3e418c4d19b50ac21b84", 
 
     "P_NAME": "Martina", 
 
     "CART_ID": "", 
 
     "O_ID": "", 
 
     "id": "597c218136c81d38dc77c62e" 
 
     }, 
 
     { 
 
     "HOST": "", 
 
     "U_ID": "59687ee6cd62a604e2bb0d1f", 
 
     "PATH": "CustomershippingPage", 
 
     "REFERER": "cartPage", 
 
     "AGENT": "", 
 
     "OS": "", 
 
     "DATE_TIME": "2017-07-29T05:48:20.386Z", 
 
     "S_ID": "46866f41-9f43-4d28-a602-490db68dc029", 
 
     "C_ID": "", 
 
     "C_NAME": "", 
 
     "P_ID": "", 
 
     "P_NAME": "", 
 
     "CART_ID": "597c21a336c81d38dc77c62f", 
 
     "O_ID": "", 
 
     "id": "597c21a436c81d38dc77c630" 
 
     }, 
 
     { 
 
     "HOST": "", 
 
     "U_ID": "59687ee6cd62a604e2bb0d1f", 
 
     "PATH": "customerpayment", 
 
     "REFERER": "CustomershippingPage", 
 
     "AGENT": "", 
 
     "OS": "", 
 
     "DATE_TIME": "2017-01-08T05:48:46.356Z", 
 
     "S_ID": "56ad3bd7-854b-42e9-8443-46c514eb2ece", 
 
     "C_ID": "", 
 
     "C_NAME": "", 
 
     "P_ID": "", 
 
     "P_NAME": "", 
 
     "CART_ID": "597c21a336c81d38dc77c62f", 
 
     "O_ID": "", 
 
     "id": "597c21be36c81d38dc77c631" 
 
     } 
 
    ] 
 

 
var result = arr.reduce((result, date) => { 
 
    var occurances = arr1.filter((obj) => { 
 
    let d = new Date(obj['DATE_TIME']); 
 
    var day = d.getDate(); 
 
    var month = d.getMonth() + 1; 
 
    var year = d.getFullYear(); 
 

 
    if(day < 10){ 
 
     day='0'+day; 
 
    } 
 
    if(month<10){ 
 
     month='0'+month; 
 
    } 
 
    var newDate = month+'-'+day+'-'+year; 
 
    
 
    return date === newDate; 
 
    }).length; 
 
    result[date] = occurances; 
 
    return result; 
 
},{}); 
 

 
console.log(result);

來源

2017-08-01 08:18:12

謝謝你的回覆。它的工作。：） –

它有點過於複雜，不是嗎？ –

@NinaScholz你寫的最優雅的代碼，是的，它很複雜。 –

，您可以先遍歷arr，並把它的所有日期的結果與值0鍵，那麼你可以遍歷您arr1並使用每個日期作爲重點爲結果對象併爲每個日期保持遞增計數。是這樣的：

var arr=[ 
 
"08-01-2017", 
 
"07-31-2017", 
 
"07-30-2017", 
 
"07-29-2017", 
 
"07-28-2017", 
 
"07-27-2017", 
 
"07-26-2017"]; 
 

 
var arr1= [ 
 
    { 
 
    "HOST": "", 
 
    "U_ID": "", 
 
    "PATH": "Home", 
 
    "REFERER": "", 
 
    "AGENT": "", 
 
    "OS": "", 
 
    "DATE_TIME": "2017-07-31T05:44:06.743Z", 
 
    "S_ID": "80067826-0cad-4806-b40e-8e5d8be18e53", 
 
    "C_ID": "", 
 
    "C_NAME": "", 
 
    "P_ID": "", 
 
    "P_NAME": "", 
 
    "CART_ID": "", 
 
    "O_ID": "", 
 
    "id": "597c20a636c81d38dc77c626" 
 
    }, 
 
    { 
 
    "HOST": "", 
 
    "U_ID": "", 
 
    "PATH": "ProductlistPage", 
 
    "REFERER": "Home", 
 
    "AGENT": "", 
 
    "OS": "", 
 
    "DATE_TIME": "2017-07-30T05:44:22.425Z", 
 
    "S_ID": "7fe1795a-5064-43d7-9a62-48b0f156a2c3", 
 
    "C_ID": "1", 
 
    "C_NAME": "Sparklers", 
 
    "P_ID": "", 
 
    "P_NAME": "", 
 
    "CART_ID": "", 
 
    "O_ID": "", 
 
    "id": "597c20b636c81d38dc77c627" 
 
    }, 
 
    { 
 
    "HOST": "", 
 
    "U_ID": "", 
 
    "PATH": "ProductlistPage", 
 
    "REFERER": "Home", 
 
    "AGENT": "", 
 
    "OS": "", 
 
    "DATE_TIME": "2017-07-29T05:45:25.064Z", 
 
    "S_ID": "439667fe-ab24-4bf6-959e-152a4f631fe3", 
 
    "C_ID": "595f40038c4d19b50ac21b98", 
 
    "C_NAME": "Sparklers", 
 
    "P_ID": "", 
 
    "P_NAME": "", 
 
    "CART_ID": "", 
 
    "O_ID": "", 
 
    "id": "597c20f536c81d38dc77c628" 
 
    }, 
 
    { 
 
    "HOST": "", 
 
    "U_ID": "", 
 
    "PATH": "ProductdetailsPage", 
 
    "REFERER": "ProductlistPage", 
 
    "AGENT": "", 
 
    "OS": "", 
 
    "DATE_TIME": "2017-07-29T05:45:39.047Z", 
 
    "S_ID": "a21c273a-372e-4a81-9997-d468d5efd299", 
 
    "C_ID": "1", 
 
    "C_NAME": "Sparklers", 
 
    "P_ID": "595f3e418c4d19b50ac21b84", 
 
    "P_NAME": "Martina", 
 
    "CART_ID": "", 
 
    "O_ID": "", 
 
    "id": "597c210236c81d38dc77c629" 
 
    }, 
 
    { 
 
    "HOST": "", 
 
    "U_ID": "", 
 
    "PATH": "Home", 
 
    "REFERER": "", 
 
    "AGENT": "", 
 
    "OS": "", 
 
    "DATE_TIME": "2017-07-28T05:47:15.604Z", 
 
    "S_ID": "a4278659-8053-45fd-8a95-78766fd7541b", 
 
    "C_ID": "", 
 
    "C_NAME": "", 
 
    "P_ID": "", 
 
    "P_NAME": "", 
 
    "CART_ID": "", 
 
    "O_ID": "", 
 
    "id": "597c216336c81d38dc77c62a" 
 
    }, 
 
    { 
 
    "HOST": "", 
 
    "U_ID": "", 
 
    "PATH": "ProductlistPage", 
 
    "REFERER": "Home", 
 
    "AGENT": "", 
 
    "OS": "", 
 
    "DATE_TIME": "2017-07-27T05:47:22.700Z", 
 
    "S_ID": "874bb326-ab02-4061-a029-bef5977d4c65", 
 
    "C_ID": "595f40038c4d19b50ac21b98", 
 
    "C_NAME": "Sparklers", 
 
    "P_ID": "", 
 
    "P_NAME": "", 
 
    "CART_ID": "", 
 
    "O_ID": "", 
 
    "id": "597c216b36c81d38dc77c62b" 
 
    }, 
 
    { 
 
    "HOST": "", 
 
    "U_ID": "", 
 
    "PATH": "CartPage", 
 
    "REFERER": "ProductlistPage", 
 
    "AGENT": "", 
 
    "OS": "", 
 
    "DATE_TIME": "2017-07-27T05:47:25.758Z", 
 
    "S_ID": "dd9096f9-79ea-4d86-81ce-149e364ab1ed", 
 
    "C_ID": "1", 
 
    "C_NAME": "Sparklers", 
 
    "P_ID": "", 
 
    "P_NAME": "", 
 
    "CART_ID": "", 
 
    "O_ID": "", 
 
    "id": "597c216d36c81d38dc77c62c" 
 
    }, 
 
    { 
 
    "HOST": "", 
 
    "U_ID": "", 
 
    "PATH": "ProductdetailsPage", 
 
    "REFERER": "ProductlistPage", 
 
    "AGENT": "", 
 
    "OS": "", 
 
    "DATE_TIME": "2017-07-29T05:47:42.047Z", 
 
    "S_ID": "4ed84c84-80ec-4494-9ffe-453f19e2c079", 
 
    "C_ID": "1", 
 
    "P_ID": "595f3e418c4d19b50ac21b84", 
 
    "P_NAME": "Martina", 
 
    "CART_ID": "", 
 
    "O_ID": "", 
 
    "id": "597c217d36c81d38dc77c62d" 
 
    }, 
 
    { 
 
    "HOST": "", 
 
    "U_ID": "", 
 
    "PATH": "CartPage", 
 
    "REFERER": "ProductdetailsPage", 
 
    "AGENT": "", 
 
    "OS": "", 
 
    "DATE_TIME": "2017-07-29T05:47:45.174Z", 
 
    "S_ID": "91153a97-d79e-4d86-9872-5df51bd7e82f", 
 
    "C_ID": "1", 
 
    "P_ID": "595f3e418c4d19b50ac21b84", 
 
    "P_NAME": "Martina", 
 
    "CART_ID": "", 
 
    "O_ID": "", 
 
    "id": "597c218136c81d38dc77c62e" 
 
    }, 
 
    { 
 
    "HOST": "", 
 
    "U_ID": "59687ee6cd62a604e2bb0d1f", 
 
    "PATH": "CustomershippingPage", 
 
    "REFERER": "cartPage", 
 
    "AGENT": "", 
 
    "OS": "", 
 
    "DATE_TIME": "2017-07-29T05:48:20.386Z", 
 
    "S_ID": "46866f41-9f43-4d28-a602-490db68dc029", 
 
    "C_ID": "", 
 
    "C_NAME": "", 
 
    "P_ID": "", 
 
    "P_NAME": "", 
 
    "CART_ID": "597c21a336c81d38dc77c62f", 
 
    "O_ID": "", 
 
    "id": "597c21a436c81d38dc77c630" 
 
    }, 
 
    { 
 
    "HOST": "", 
 
    "U_ID": "59687ee6cd62a604e2bb0d1f", 
 
    "PATH": "customerpayment", 
 
    "REFERER": "CustomershippingPage", 
 
    "AGENT": "", 
 
    "OS": "", 
 
    "DATE_TIME": "2017-01-08T05:48:46.356Z", 
 
    "S_ID": "56ad3bd7-854b-42e9-8443-46c514eb2ece", 
 
    "C_ID": "", 
 
    "C_NAME": "", 
 
    "P_ID": "", 
 
    "P_NAME": "", 
 
    "CART_ID": "597c21a336c81d38dc77c62f", 
 
    "O_ID": "", 
 
    "id": "597c21be36c81d38dc77c631" 
 
    } 
 
]; 
 

 
var result = {}; 
 

 

 
arr.forEach(function(date){ 
 
    result[date] = 0; 
 
}) 
 

 

 
arr1.forEach(function(ob){ 
 
    var date = new Date(ob['DATE_TIME']); 
 
    var m = date.getMonth() + 1; 
 
    m = m > 9 ? m : '0' + m; 
 
    var d = date.getDate() + 1; 
 
    d = d > 9 ? d : '0' + d; 
 
    date = m + '-' + d + '-' + date.getFullYear(); 
 
    result[date] = date in result ? parseInt(result[date]) + 1 : 1; 
 
}) 
 

 

 
console.log(result);

來源

2017-08-01 08:00:36 Dij

你究竟在哪裏比較arr1和arr？我想你錯過了解他的問題 – Dino

@masterfan它更可能是一個想法，現在檢查，我有更新代碼。 – Dij

似乎可以假定日期部分具有字符固定數量。因此：

arr1.reduce((acc, item) => { 
    const key = item.DATE_TIME.substr(0,10); 
    if (arr.hasOwnProperty(key)) { acc[key] = (acc[key] || 0) + 1 } 
    return acc; 
}, {})

來源

2017-08-01 08:25:55

則可以將日期正常化的ISO 6801串，作爲DATE_TIME時間戳等。然後在日期作爲關鍵字的對象中只添加一個。

var data = [{ DATE_TIME: "2017-07-31T05:44:06.743Z" }, { DATE_TIME: "2017-07-30T05:44:22.425Z" }, { DATE_TIME: "2017-07-29T05:45:25.064Z" }, { DATE_TIME: "2017-07-29T05:45:39.047Z" }, { DATE_TIME: "2017-07-28T05:47:15.604Z" }, { DATE_TIME: "2017-07-27T05:47:22.700Z" }, { DATE_TIME: "2017-07-27T05:47:25.758Z" }, { DATE_TIME: "2017-07-29T05:47:42.047Z" }, { DATE_TIME: "2017-07-29T05:47:45.174Z" }, { DATE_TIME: "2017-07-29T05:48:20.386Z" }, { DATE_TIME: "2017-01-08T05:48:46.356Z" }], 
 
    dates = ["08-01-2017", "07-31-2017", "07-30-2017", "07-29-2017", "07-28-2017", "07-27-2017", "07-26-2017"], 
 
    count = Object.create(null); 
 

 
dates.forEach(function (d) { 
 
    count[d.replace(/(..)-(..)-(....)/, '$3-$1-$2')] = 0; 
 
}); 
 
data.forEach(function (o) { 
 
    var key = o.DATE_TIME.slice(0, 10); 
 
    (key in count) && count[key]++; 
 
}); 
 
    
 
console.log(count);

.as-console-wrapper { max-height: 100% !important; top: 0; }

來源

2017-08-01 08:32:18

比較兩個數組並找到使用javascript的每個值count

回答

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