這是我必須從中獲取數(shù)據(jù)的url。我想要 postIds 的頻率。我如何使用方法（map、filter 或 reduce）來(lái)做到這一點(diǎn)。我已經(jīng)使用循環(huán)完成了?？梢栽诟玫姆椒?？請(qǐng)幫助..<!DOCTYPE html><html><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title></head><body> <script> fetch('http://jsonplaceholder.typicode.com/comments') .then( function(response) { if (response.status !== 200) { console.log('Looks like there was a problem. Status Code: ' + response.status); return; } response.json().then(function(data) { var na=[]; for(var i=1;i<=100;i++) { var a= data.filter(ab=> { return ab.postId==i;}); // console.log(a); na.push({PostId:i,frequency:a.length}); } console.log(na); } )}) .catch(function(err) { console.log('Fetch Error :-S', err); }); </script></body></html>
如何使用javascript（過(guò)濾器）來(lái)計(jì)算對(duì)象值的頻率？
UYOU
2022-10-21 09:32:21
