andrewhayward / dijkstra Goto Github PK

thank you for your code, i just want to ask you if we have a node which go to more than two nodes for example : node a go to b, c, d, e. is it possible to set our map like that:
var map = {a:{b:1,c:3,d:2,e:5},
....
....
}

On line 73 of graph.js, there is
predecessor = predecessors[u];

predecessor is not predefined so it ends up in the global scope. I'm not quite sure what it's supposed to do in the first place considering it's not used anywhere.

What's this code's licence ?

Poor description. The cod also does not work. There is no way to dynamically set keys for objects in javascript . I guess that a map function must be used t0 produce that weird crazy structure for an adjacency matrix

Hi andrew, thanks for this code.
There's a way to implement this structure:

var map = [
    {
        node: 'a',
        next: [
            {
                id: 'b',
                weigth: 3
            },
            {
                id: 'c',
                weigth: 1
            }
        ]
    }, {
        node: 'b',
        next: [
            {
                id: 'a',
                weigth: 2
            },
            {
                id: 'c',
                weigth: 1
            }
        ]
    }, {
        node: 'c',
        next: [
            {
                id: 'a',
                weigth: 4
            },
            {
                id: 'd',
                weigth: 2
            }
        ]
    }, {
        node: 'd',
        next: []
    }
]

instead of

var map = {
    a: {
        b: 3,
        c: 1
    },
    b: {
        a: 2,
        c: 1
    },
    c: {
        a: 4,
        b: 1
    },
    d: {}
}

I ask you this because i have some nodes with alphanumeric string (e.g. 145EMA3) and the JS notation not allow the number into object key.

Hello Andrew,

I would like to use your dijkstra algorithm for the underground but I face some problems :

• how can I add cost when you make a transfer ?
• how can I add the line and direction you have to take ?

Could you give me a simple sample ?

I looked for weeks but didn't find anything.

Many thanks

Maybe you can output the result as an array include:
[Route, WeightInTotal]

just added up the weight. that's really helpful

Duh, nvm