[英]Javascript - How do I iterate over values of keys in an object?
var roles = {
Guest: ["CAN_REGISTER"],
Player: ["CAN_LOGIN", "CAN_CHAT"],
Admin: ["CAN_KICK", "CAN_LOGIN", "CAN_CHAT"]
};
那是我的目标,我正在尝试检查用户是否具有特定的权限
get_perms: function(player, perm) {
let arrayLength = accounts.length;
let name = player.name;
if (arrayLength == 0 && (perm == "CAN_CHAT" || perm == "CAN_LOGIN" || perm == "CAN_KICK")){
return false;
}
for (var i = 0; i < arrayLength; i++)
{
if (accounts[i][0] == name)
{
for (var key in roles)
{
if (roles.hasOwnProperty(key))
{
if (accounts[i][2] == key){
if (roles[key] == perm){
for (var x = 0; x < roles[key].length; x++){
if (roles[key][x] == perm){
return true;
}
}
}
}
}
}
}
else{
return false;
}
}
}
account[i][2]
是与名称匹配的玩家角色,我正在尝试检查该角色是否具有发送至该功能的perm
,例如"CHAT_PERMS"
const roles = {
Guest: ["CAN_REGISTER"],
Player: ["CAN_LOGIN", "CAN_CHAT"],
Admin: ["CAN_KICK", "CAN_LOGIN", "CAN_CHAT"]
};
const arr = Object.keys(roles).reduce((acc, cur) => [...acc, ...roles[cur]], []);
console.log(arr);
const rightSet = new Set(arr);
console.log(rightSet.has("CAN_CHAT"))
这是我使用ES6的解决方案:
[ "CAN_REGISTER", "CAN_LOGIN", "CAN_CHAT", "CAN_KICK", "CAN_LOGIN", "CAN_CHAT" ]
has()
函数检查Set
是否正确 使用for-loop
,该功能includes
检查角色和权限。
var roles = { Guest: ["CAN_REGISTER"], Player: ["CAN_LOGIN", "CAN_CHAT"], Admin: ["CAN_KICK", "CAN_LOGIN", "CAN_CHAT"] }; var playerRoles = ['Admin', 'Guest']; var perm = 'CAN_LOGIN'; var found = false; for (var role of playerRoles) { if ((found = roles[role].includes(perm))) { console.log("Permission '"+perm+"' found in Role '" + role + "'"); break; } } if (!found) { console.log("Permission '"+perm+"' didn't found"); }
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