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converting array to json object

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问题 I have an array in java script .. something like: var myarray = ['a','b',c']; and var item = 'Name'; and I want to convert that to something like { a:{ b:{ c:{ item:'Name' } } } } 回答1: var result = myarray.reverse().reduce(function (value, key) { var result = {}; result[key] = value; return result; }, { item : item }); In other words, you're packing the result layer by layer into new objects, using your keys from the array. 回答2: var obj = {}; var curobj = obj; for (var i = 0; i < myarray

json.Unmarshal json string to object is empty result [duplicate]

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问题 This question already has answers here : Printing Empty Json as a result [duplicate] (1 answer) json.Marshal(struct) returns “{}” (2 answers) Closed 4 months ago . I've got a very simple program like this: package main import ( "encoding/json" "fmt" ) type RunCommand struct{ level string `json:"level"` caller string `json:"caller"` msg string `json:"msg"` cmd string `json:"cmd"` } func main() { content := `{"level":"info","caller":"my.go:10","msg":"run","cmd":"--parse"}` runCommand :=

remove duplicates from object array data java

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问题 i want to know how to remove duplicates in object. for example cat c[] = new cat[10]; c[1].data = "ji"; c[2].data = "pi"; c[3].data = "ji"; c[4].data = "lp"; c[5].data = "ji"; c[6].data = "pi"; c[7].data = "jis"; c[8].data = "lp"; c[9].data = "js"; c[10].data = "psi"; i would like to remove the duplicates value from object array. thanks and advance 回答1: I assume you want to create another array which is duplicate free. (as you cannot change the size of an array) You could implement hashCode

remove duplicates from object array data java

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Java Multi-Level Comparator

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问题 I am working on a problem where I must take these "Song-artist pairs" from an input file and sort alphabetically. The guidelines to the sorting goes like so: Should sort the song-artist pairs by the name of the author first. Once sorted by the artists, if there are multiple songs by the same artist, they should be sort alphabetically as well. If the artists name starts with "The", ignore it for sorting purposes. My problem is that when I am sorting these, I am able to get the artists sorted

In C# if an object in a list is added to another list, does changing the object in the second list change the same object in the first list?

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问题 Say I have a list of Person objects ( List<Person> ) called persons , like this: class Person { public int PersonId { get; set; } // Unique ID for the person loaded from database public string Name { get; set; } } // In a different class public List<Person> Persons = new List<Person>(); // Person objects are subsequently added to the list and then I select some of the Person objects from the list, sort them by a property (e.g. by each person's unique ID PersonId ), and add these selected

es6：阮一峰教程学习

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全局作用域函数作用域块级作用域一：块级作用域 1.外层作用域无法读取内层作用域的变量 2.let const声明的变量只能先声明，后使用。 let const都是块级作用域！　const声明的变量必须赋初始值且不可变，像final！不可变是指引用不可变，也就是内存中的那片地址。 Object.freeze（要冻结对象）引用指向的对象不可变哦！ const声明引用不可变！ 3.es6六种声明变量的方法：var function let const import class 4.模块化编程：封装的思想哦！　　作用域 5.顶层对象全局对象二：变量的解构赋值 1.数组赋值的时候，进行模式匹配！　　　就是按照模式匹配的方式来赋值！（解构）模式不匹配:解构失败只要某种数据结构是可遍历的，那么就可以进行解构赋值。 2.对象解构赋值：模式匹配的时候按照key、value匹配。不同于数组是按照索引。 3.字符串三：五：数组扩展 1. Array.from（）方法用于将两类对象转为真正的数组：类似数组的对象（array-like object）和可遍历（iterable）的对象（包括ES6新增的数据结构Set和Map）。 2. Array.of（）方法用于将一组值，转换为数组。 3. Array.copyWithin() 在当前数组内部，将指定位置的成员复制到其他位置

Object.defineProperty

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关于Object.defineProperty的学习，和VUE响应式实现的猜想 Object.defineProperty(参数1, 参数2, { 对象参数 } ）参数1:实例对象的名字，绑定对象参数2：添加或需要修改的属性（必须是字符串，因为是属性） * 添加：指这里填的属性名称，是所绑定的对象里面所不包含的属性，是一个新属性 * 修改：值这里填的属性名称，在所绑定的对象里面已经含有 {对象参数}：里面含get，和 set函数传参方式如下： { get：function(){ retuern val }, //val即为参数二的属性值 set:function(){ 新属性 = val } } 关于set函数的说明 set函数需要传参触发才能执行,即当在Object.defineProperty外传参时（如：对象名.参数2 = 新属性值）此时，实例对象里的参数2:属性值被替换为新属性:新属性值如果新属性值与实例里的其他属性同名，该同名属性的键值对也会被同时替换当新属性名与参数2相同时，会报错实例代码传的参数二与赋值的属性为同一属性 var test = { a : 1, b : 2, c : 3 }; Object.defineProperty(test,"a",{ //a为参数二 set:function(val){ this.d = val //d为新属性

How do I access the name of a given variable in python?

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问题 I am programming in python and need to access the name I have given to an object so as to be able to pass this as a string (concatenated with another string). The reason I need to do this is that the program I am using forces me to create a global (which in my case is a dictionary) and I am writing a function to work in general with several different objects (which each have similar sets of properties, eg. object 1 is of length 2 (signifying in my case 2 neurons) labelled 0 and 1 and each of

Using Python objects in C++

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问题 I'm writing a code that calculates the images of nonlinear maps using methods from interval analysis, applies a minkowski sum and repeats for an arbitrary number of iterations. I've written a working code in Python, however I would like to be able to implement some of the more iteration/recursion intensive parts of the algorithm in C++ to benefit from the increased speed. I have used Cython in the past with great results, but I'd like to practice my C++. Also, my objects are complicated