I have the following namespace (com.myCompany.myProject):
var com = {
myCompany: {
myProject: {
x: 1,
y: 2,
o: function() {
}
}
}
};
For example, I have the following code:
var self = com.myCompany.myProject;
How can I show this namespace as a string, e.g. "com.myCompany.myProject" ?
I've tried JSON.stringify() but it isn't that I looked for.
Thanks,
It's not possible. An object has no way of knowing where it is stored.
If you need this kind of functionality, you have to store it somewhere in the object.
var com = {
myCompany: {
myProject: {
x: 1,
y: 2,
'_namespace': 'com.myCompany.myProject',
o: function() {
}
}
}
};
As seanizer says, this is not possible. Here are some related things that are possible, though:
index property as a string:
var self = com["myCompany"]["myProject"];
// or even...
var myCo = "myCompany";
var myPr = "myProject";
var self = com[myCo][myPr];
alert(myCo + "." + myPr);
get all properties of an object as strings:
for(var p in com) {
alert(p.toString());
}
Will either of those help you?
This may not be exactly what you need, but hey, it may. Ext has a method called Ext.namespace, aliased as Ext.ns. It works like the following
Ext.ns('com.app.package'); com.app.package.Clazz = function() {};
http://dev.sencha.com/deploy/dev/docs/source/Ext.html#method-Ext-namespace
If this will help you, use their source code as inspiration.
You asked how, here's the simplest way I can think of. It involves eval but please don't judge on that basis:
var ns = 'com.myCompany.myProject'
,self = eval(ns);
console.log(self.x); // 1
I had a similar requirement, I want to use an object map to avoid having magical strings in my code. For example I want to have a map of messages like:
var message = {
configuration:
{
pdms:
{
type: {
getTypes: {},
getDatabases: {}
}
}
}
};
Now instead of using a string like:
"message.configuration.pdms.type.getTypes"
I want to use:
message.configuration.pdms.type.getTypes
And convert that to a string. For that I use the following utility function. Note that the underscore lib is required.
var objectToString = (orig, string, obj) => {
var parse = (orig, string, obj) => {
return _.map(_.keys(orig), (key) => {
if (_.isEmpty(orig[key])) {
return orig[key] === obj ? string + '.' + key : '';
} else {
return objectToString(orig[key], string + '.' + key, obj);
}
});
};
return _.chain(parse(orig, string, obj))
.flatten()
.find ((n) => {return n.length > 0;})
.value();
};
To make it more convenient, I partial apply that function with the source object to turn to strings and the root namespace.
var messageToString = _.partial(objectToString, message, 'message');
messageToString(message.configuration.pdms.type.getTypes);
// returns: 'message.configuration.pdms.type.getTypes'
