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fiter 方法 过滤查找 有大用

articles: [            {                "title": "What You Need To Know About CSS Variables",                "url": "https://www.runoob.com/css/css-tutorial.html",                "image": "https://static.runoob.com/images/icon/css.png"            },            {                "title": "Freebie: 4 Great Looking Pricing Tables",                "url": "https://www.runoob.com/html/html-tutorial.html",                "image": "https://static.runoob.com/images/icon/html.png"            },            {                "title": "20 Interesting JavaScript and CSS Libraries for February 2016",                "url": "https://www.runoob.com/css3/css3-tutorial.html",                "image": "https://static.runoob.com/images/icon/css3.png"            },            {                "title": "Quick Tip: The Easiest Way To Make Responsive Headers",                "url": "https://www.runoob.com/css3/css3-tutorial.html",                "image": "https://static.runoob.com/images/icon/css3.png"            },            {                "title": "Learn SQL In 20 Minutes",                "url": "https://www.runoob.com/sql/sql-tutorial.html",                "image": "https://static.runoob.com/images/icon/sql.png"            },            {                "title": "Creating Your First Desktop App With HTML, JS and Electron",                "url": "https://www.runoob.com/js/js-tutorial.html",                "image": "https://static.runoob.com/images/icon/html.png"            }        ]


articles_array  = articles;




articles_array = articles_array.filter(function(item){              if(item.title.toLowerCase().indexOf(searchString) !== -1){                    return item;  }


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