javascript-如何在jQuery中使用单行将null替换为“-”

如何用-在jQuery中使用单行替换null

例如

    var obj={
        "Key1":null,
        "key2":"I have null",
        "key3":null

    }

预期产量：

var obj={
    "Key1":"-",
    "key2":"I have null",
    "key3":"-"

}

解决方法:

您可以使用Object.keys并检查该值.带有递归函数并在迭代对象上具有闭包.

var iter = o => k => o[k] && typeof o[k] === 'object' && Object.keys(o[k]).forEach(iter(o[k])) || o[k] === null && (o[k] = '-'),
    object = { Key1: null, key2: "I have null", key3: { kje: "test", dfasfd: null, demo: "null demo" } }; 

Object.keys(object).forEach(iter(object));
console.log(object);

基本上可以用ES5解决

var object = { Key1: null, key2: "I have null", key3: { kje: "test", dfasfd: null, demo: "null demo" } }; 

Object.keys(object).forEach(function iter(o) {
    return function (k) {
        if (o[k] && typeof o[k] === 'object') {
            Object.keys(o[k]).forEach(iter(o[k]));
            return;
        }
        o[k] === null && (o[k] = '-');
    };
}(object));
console.log(object);