[英]Finding longest string in an array (even if it's an array of numbers)
When I run this: 当我运行这个:
var array= [123, ["hello", 67, 888888], "try", {key: "key", value: "this is the longest String"}]
longestString(array);
correct answer:
>>>"this is the longest String"
current answer:
>>>"try"
How can I update this function to pass the above test and return the correct answer? 如何更新此功能以通过上述测试并返回正确答案?
below is the longestString() function: 下面是longestString()函数:
function longestString(array) {
// return the longest string in the array
var longest = 0;
var longestString = "";
for (var i = 0; i < array.length; i++) {
if (array[i].length > longest && typeof array[i] =="string") {
longest = array[i].length;
longestString = array[i];
}
}
return longestString;
}
Add a typeof to check that data is string or not 添加typeof以检查数据是否为字符串
like this 像这样
function longestString(array) {
// return the longest string in the array
var longest = 0;
var longestString = "";
for (var i = 0; i < array.length; i++) {
if (array[i].length > longest && typeof array[i] ==="string") {
longest = array[i].length;
longestString = array[i];
}
}
return longestString;
}
EDIT 编辑
for strings within nested arrays/ objects? 嵌套数组/对象中的字符串?
Try like this 这样尝试
function longestString(array) {
// return the longest string in the array
var longest = 0;
var longestString = "";
for (var i = 0; i < array.length; i++) {
if (Object.prototype.toString.call(array[i]) === '[object Array]') {
array[i].forEach(function (it) {
if (it.length > longest) {
longest = it.length;
longestString = it;
}
})
} else if (Object.prototype.toString.call(array[i]) === '[object Object]') {
for (var j in array[i]) {
if (array[i][j].length > longest) {
longest = array[i][j].length;
longestString = array[i][j];
}
}
} else if (typeof array[i] == "string" && array[i].length > longest) {
longest = array[i].length;
longestString = array[i];
}
}
return longestString;
}
console.log(longestString([123, ["hello", 67, 888888], "try", {
key: "key",
value: "this is the longest String"
}]));
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