JavaScript 数组.entries() 方法
JavaScript 的 array.entries() 方法用于返回包含键值对的 Array Iterator 对象。
语法如下 −
array.entries()
现在让我们在 JavaScript 中实现 array.entries() 方法 −
示例
<!DOCTYPE html> <html> <body> <h2>Ranking Points</h2> <p>Is any point equal to 550 from the key-value pairs...</p> <button onclick="display()">Result</button> <p id="test"></p> <script> var pointsArr = [10, 20, 30, 40, 50, 60, 70, 80, 90, 1000]; var res = pointsArr.entries(); for (val of res) { document.getElementById("test").innerHTML += val + "<br>"; } function pointsFunc(points) { return points == 550; } function display() { document.getElementById("test").innerHTML = pointsArr.some(pointsFunc); } </script> </body></html>
输出
点击“结果” −
示例
<!DOCTYPE html> <html> <body> <h2>Car Variant</h2> <button onclick="display()">Result</button> <p id="test"></p> <script> var car = ["Hatchback", "Convertible", "SUV", "AUV", "MUV"]; var res = car.entries(); for (val of res) { document.getElementById("test").innerHTML += val + "<br>"; } function display() { document.getElementById("test").innerHTML = "Array after slicing some elements = "+car.slice(1,4); } </script> </body> </html>
输出
点击“结果”按钮 −
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