检查值是否在数组中并返回true或false角度6+

时间:2019-02-07 09:18:02

标签: javascript arrays angular typescript ecmascript-6

我有这样的数组

roles = ['AnyRulesGo@admin', 'NoRules@admin', 'HowYesNo@history', 'MamaMia@survey'];

我有这样的东西

 externalLinks = [
    {
      link: '#',
      icon: 'Icon',
      translation: 'Home',
      role: '@history',
      active: false,
      visible: false
    },
    {
      link: '#',
      icon: 'Task',
      translation: 'Tasks',
      role: '@task',
      active: false,
      visible: false
    },
    {
      link: '#',
      icon: 'Files',
      translation: 'Files',
      role: '@admin',
      active: true,
      visible: false
    }
  ];

我需要一些函数来检查externaLinks的值角色是否存在于数组角色中,并从更新外部链接中的该值 visible > false true

我没有更多的代码,因为我什至不知道从哪里开始,任何帮助都会很大,谢谢

问题之一是我确实只从@开始才开始使用netire角色名称,这意味着我需要剪切该字符串,然后进行比较?

我已经尝试过使用此功能,但是没有运气

function objectsAreSame(x, y) {
   var objectsAreSame = true;
   for(var propertyName in x) {
      if(x[propertyName] !== y[propertyName]) {
         objectsAreSame = false;
         break;
      }
   }
   return objectsAreSame;
}

3 个答案:

答案 0 :(得分:2)

您可以使用externalLinks遍历array#forEach中的每个对象。然后使用rolesarray#some检查string#incldues数组中的角色,并更新visible键的值。

let roles = ['AnyRulesGo@admin', 'NoRules@admin', 'HowYesNo@history', 'MamaMia@survey'],
    externalLinks = [ { link: '#', icon: 'Icon', translation: 'Home', role: '@history', active: false, visible: false }, { link: '#', icon: 'Task', translation: 'Tasks', role: '@task', active: false, visible: false }, { link: '#', icon: 'Files', translation: 'Files', role: '@admin', active: true, visible: false } ];

externalLinks.forEach(o => {
  o.visible = false;
  if(roles.some(r => r.includes(o.role)))
    o.visible = true;
});
console.log(externalLinks);

答案 1 :(得分:0)

您可以使用forEach循环访问外部链接。然后使用someincludes检查角色是否存在。

roles = ['AnyRulesGo@admin', 'NoRules@admin', 'HowYesNo@history', 'MamaMia@survey'];

externalLinks.forEach((extLink) => {
  if(roles.some(role => role.includes(extLink.role))){
    extLink.visible = true;
  }
})

答案 2 :(得分:-1)

进行两个循环:

//Make all false
externalLinks.forEach(x=>x.visible=false);

//for each role, filter by role and forEach value filtered, make visible
role.forEach(role=>{
  let busc="@"+role.split('@')[1]
  externalLinks.filter(x=>x.role==busc)
      .forEach(xfilter=>xfilter.visible=true)
})
//If only want a role "roleSearch"
  let busc="@"+roleSearch.split('@')[1]
  externalLinks.filter(x=>x.role==busc)
      .forEach(xfilter=>xfilter.visible=true)