Javascript 基于属性值创建多个对象数组,然后遍历每个数组
假设数组中有以下对象:Javascript 基于属性值创建多个对象数组,然后遍历每个数组,javascript,jquery,arrays,object,iterator,Javascript,Jquery,Arrays,Object,Iterator,假设数组中有以下对象: var entities = [ server1: { type: server }, server2: { type: server }, server3: { type: server }, printer1: { type: printer }, printer2: { type: printer }, printer3: { type: printer }, switch1: { type: switch }
var entities = [
server1: { type: server },
server2: { type: server },
server3: { type: server },
printer1: { type: printer },
printer2: { type: printer },
printer3: { type: printer },
switch1: { type: switch },
switch2: { type: switch },
switch3: { type: switch }
]
我怎么能这样做:
typeArray(type) = []
for each type in entities {
for each entity in entities of type {
typeArray(type).push(entity)
}
}
这将导致类似于
typeArray("switch")(0) = switch1
typeArray("server")(2) = server3
typeArray("printer")(1) = printer2
除此之外,我希望能够以编程方式访问所有数组
for each typeArray() {
var type = ???
myArrayFunction(typeArray, type);
}
希望我的伪代码有意义…一个简单的map()将为您处理重新洗牌:
var entities = {
server1: { type: 'server' },
server2: { type: 'server' },
server3: { type: 'server' },
printer1: { type: 'printer' },
printer2: { type: 'printer' },
printer3: { type: 'printer' },
switch1: { type: 'switch' },
switch2: { type: 'switch' },
switch3: { type: 'switch' }
}
var typeArray={};
Object.keys(entities).map(function(a){
var v=this[a];
typeArray[v.type]=typeArray[v.type]||[];
typeArray[v.type].push(a);
},entities);
typeArray /* ==
{
"server": [
"server1",
"server2",
"server3"
],
"printer": [
"printer1",
"printer2",
"printer3"
],
"switch": [
"switch1",
"switch2",
"switch3"
]
}
*/
// a sanity check for your suggested code seems to work using js syntax:
typeArray["server"][2] // == "server3"
一个简单的map()将为您处理重新洗牌:
var entities = {
server1: { type: 'server' },
server2: { type: 'server' },
server3: { type: 'server' },
printer1: { type: 'printer' },
printer2: { type: 'printer' },
printer3: { type: 'printer' },
switch1: { type: 'switch' },
switch2: { type: 'switch' },
switch3: { type: 'switch' }
}
var typeArray={};
Object.keys(entities).map(function(a){
var v=this[a];
typeArray[v.type]=typeArray[v.type]||[];
typeArray[v.type].push(a);
},entities);
typeArray /* ==
{
"server": [
"server1",
"server2",
"server3"
],
"printer": [
"printer1",
"printer2",
"printer3"
],
"switch": [
"switch1",
"switch2",
"switch3"
]
}
*/
// a sanity check for your suggested code seems to work using js syntax:
typeArray["server"][2] // == "server3"
一个简单的map()将为您处理重新洗牌:
var entities = {
server1: { type: 'server' },
server2: { type: 'server' },
server3: { type: 'server' },
printer1: { type: 'printer' },
printer2: { type: 'printer' },
printer3: { type: 'printer' },
switch1: { type: 'switch' },
switch2: { type: 'switch' },
switch3: { type: 'switch' }
}
var typeArray={};
Object.keys(entities).map(function(a){
var v=this[a];
typeArray[v.type]=typeArray[v.type]||[];
typeArray[v.type].push(a);
},entities);
typeArray /* ==
{
"server": [
"server1",
"server2",
"server3"
],
"printer": [
"printer1",
"printer2",
"printer3"
],
"switch": [
"switch1",
"switch2",
"switch3"
]
}
*/
// a sanity check for your suggested code seems to work using js syntax:
typeArray["server"][2] // == "server3"
一个简单的map()将为您处理重新洗牌:
var entities = {
server1: { type: 'server' },
server2: { type: 'server' },
server3: { type: 'server' },
printer1: { type: 'printer' },
printer2: { type: 'printer' },
printer3: { type: 'printer' },
switch1: { type: 'switch' },
switch2: { type: 'switch' },
switch3: { type: 'switch' }
}
var typeArray={};
Object.keys(entities).map(function(a){
var v=this[a];
typeArray[v.type]=typeArray[v.type]||[];
typeArray[v.type].push(a);
},entities);
typeArray /* ==
{
"server": [
"server1",
"server2",
"server3"
],
"printer": [
"printer1",
"printer2",
"printer3"
],
"switch": [
"switch1",
"switch2",
"switch3"
]
}
*/
// a sanity check for your suggested code seems to work using js syntax:
typeArray["server"][2] // == "server3"
调试伪代码真的很难。尝试将其转换为JavaScript并让我们知道是否有任何错误。
var entities=[server1:
无效,[
应该是{
(不要忘了修复关闭)。调试伪代码非常困难。尝试将其转换为JavaScript并让我们知道是否有任何错误。var entities=[server1:
无效,[
应该是{
(也不要忘记修复关闭)调试伪代码非常困难。尝试将其转换为JavaScript,如果出现任何问题,请告诉我们。变量实体=[server1:
无效,[
应该是{
(也不要忘记修复关闭)调试伪代码真的很难。试着将其转换为JavaScript,并告诉我们是否出现任何错误。var entities=[server1:
无效,[
应该是{
(不要忘了修复关闭)这看起来不错,那么我如何解决第28行的问题:@ScottBeeson:Object.keys(typeArray)将返回一个字符串数组,其中包含最初包含在entities变量中的任何类型的唯一名称。这看起来不错,那么我如何解决第28行的问题:@ScottBeeson:Object.keys(typeArray)将返回一个字符串数组,其中包含最初包含在entities变量中的任何类型的唯一名称。这看起来不错,那么我如何解决第28行的问题:@ScottBeeson:Object.keys(typeArray)将返回entities变量中最初包含的任何类型的唯一名称的字符串数组。这看起来不错,因此我如何解决第28行的问题:@ScottBeeson:Object.keys(typeArray)将返回entities变量中最初包含的任何类型的唯一名称的字符串数组。