lodash

https://lodash.com/docs#mapKeys Is it possible to map an Object's keys deeply using Lodash? If not, is there another library providing this functionality (if grouped with other deep iteration and manipulation functionality, even better!)? Else, how would one go about implementing this? The main struggle I see is in identifying pure key/value objects that are safely, deeply iterable. It's easy to throw out Arrays, but it's important to note that the function shouldn't try to deeply iterate on other objects like a regex, for example. Intended result- var obj = { a: 2, b: { c: 2, d: { a: 3 } } };

Give the following array of objects, I need to sort them by the date field ascending. var myArray = [ { name: "Joe Blow", date: "Mon Oct 31 2016 00:00:00 GMT-0700 (PDT)" }, { name: "Sam Snead", date: "Sun Oct 30 2016 00:00:00 GMT-0700 (PDT)" }, { name: "John Smith", date: "Sat Oct 29 2016 00:00:00 GMT-0700 (PDT)" } ]; so that in this example, the final result would be John Smith, Sam Snead, and Joe Blow. I am trying to use lodash's _.sortBy() , but I can't get any sorting to take place no matter how I try to use it: _.sortBy(myArray, function(dateObj) { return dateObj.date; }); or _.sortBy

1. 什么是Flow? Flow 是javascript代码的静态类型检查工具。它是Facebook的开源项目(https://github.com/facebook/flow)，Vue.js(v2.6.10的源码使用了Flow做了静态类型检查。因此我们现在先来了解下Flow的基本知识，有助于我们分析源码。 2. 为什么要用Flow？ javascript是弱类型语言，弱类型体现在代码中的变量会根据上下文环境自动改变的数据类型。那么这种弱类型有优点也有缺点，优点是我们容易学习和使用，缺点是：开发者经常因为赋值或传值导致类型错误。造成一些和预期不一样的结果。在代码编译的时候可能不会报错，但是在运行阶段就可能会出现各种奇怪的bug。因此在大型项目中我们有必要使用Flow来做代码静态类型检查。 下面我们从一个简单的demo说起。比如如下代码： function add (x) { return x + 10; } var a = add('Hello!'); console.log(a); // 输出：Hello!10 如上代码，x这个参数，我们在add函数声明的时候，其实我们希望该参数是一个数字类型，但是在我们代码调用的时候则使用了字符串类型。导致最后的结果为 "Hello!10"; 为什么会出现这种结果呢？那是因为 加号(+)在javascript语言中，它既有作为数字的加运算符外

Is it possible to loop through the properties in a JavaScript object? For instance, I have a JavaScript object defined as this: myObject.options = { property1: 'value 1', property2: 'value 2' }; Properties will get dynamically added to this object. Is there a way for me to just loop through and do a check if a property exists? If so, how? Yes you can and lodash is not needed... i.e. for (var key in myObject.options) { // check also if property is not inherited from prototype if (myObject.options.hasOwnProperty(key)) { var value = myObject.options[key]; } } Edit : the accepted answer ( _.forOwn

I am trying to sort an array by 'name' value (using Lodash). I used the Lodash docs to create the solution below however .orderBy doesn't seem to be having any affect at all. Can anyone shed some light on the correct way to sort array? Chars Array [ { "id":25, "name":"Anakin Skywalker", "createdAt":"2017-04-12T12:48:55.000Z", "updatedAt":"2017-04-12T12:48:55.000Z" }, { "id":1, "name":"Luke Skywalker", "createdAt":"2017-04-12T11:25:03.000Z", "updatedAt":"2017-04-12T11:25:03.000Z" } ] Function Code var chars = this.state.characters; chars = _.orderBy(chars, 'name', 'asc'); // Use Lodash to sort

I'm sure it's somewhere inside the LoDash docs, but I can't seem to find the right combination. var users = [{ id: 12, name: Adam },{ id: 14, name: Bob },{ id: 16, name: Charlie },{ id: 18, name: David } ] // how do I get [12, 14, 16, 18] var userIds = _.map(users, _.pick('id')); Since version v4.x you should use _.map : _.map(users, 'id'); // [12, 14, 16, 18] this way it is corresponds to native Array.prototype.map method where you would write (ES2015 syntax): users.map(user => user.id); // [12, 14, 16, 18] Before v4.x you could use _.pluck the same way: _.pluck(users, 'id'); // [12, 14, 16,

let array = [{"id":248439,"name":"Cross Creek Ranch/Creek Cove","surveyStatus":{"territoryName":"Fulshear","subdivisionName":"Cross Creek Ranch/Creek Cove","subdivisionId":248439,"dateTimeAdded":null,"surveyStatus":"0"}},{"id":248545,"name":"Lakes of Bella Terra/Via Verdone","surveyStatus":{"territoryName":"Fulshear","subdivisionName":"Lakes of Bella Terra/Via Verdone","subdivisionId":248545,"dateTimeAdded":null,"surveyStatus":"0"}},{"id":248546,"name":"Lakes of Bella Terra/Via Moderna","surveyStatus":{"territoryName":"Fulshear","dateTimeAdded":"2017-03-13 14:24:24.312","lng":-95

I have JSON look like this [{"id":"7","name":"hello","username":"hell7s692","password":"dAggzyFMnBXq3RjoTWoJ3ndBkGhyU6njT2ZPlNfXVV8+XU3vvrTaULUAbPcmsqgj1NpXOpzieKRXWox\/BVcYrA==","email":"hello@gmail.com","mobile_number":"7736527089","address":"hello","date":"24 Jan 2016 12:14:02","active":"1","commission":"5"}, {"id":"7","name":"hello","username":"hell7s692","password":"dAggzyFMnBXq3RjoTWoJ3ndBkGhyU6njT2ZPlNfXVV8+XU3vvrTaULUAbPcmsqgj1NpXOpzieKRXWox\/BVcYrA==","email":"hello@gmail.com","mobile_number":"7736527089","address":"hello","date":"24 Jan 2016 12:14:02","active":"1","commission":"5"} ]

I am using angular-cli in angular2 rc1 for development. I have installed lodash node_module through npm and configured it in systemjs using following: system.config.ts /*********************************************************************************************** * User Configuration. **********************************************************************************************/ /** Map relative paths to URLs. */ const map: any = { }; /** User packages configuration. */ const packages: any = { }; ////////////////////////////////////////////////////////////////////////////////////////////////