Iterating through a dataset in JavaScript

Trying to find specific information on this particular problem has proven challenging, so I figured I would seek assistance here instead.

I have a desire to create an arc between an origin and destination based on given longitude and latitude coordinates. These values are already stored in a variable, but I am uncertain about how to properly implement the loop within the provided plugin. You can view the sample plugin page I am referencing by visiting: http://jsbin.com/nutawiboci/1/edit?html,output

The included image showcases my attempt at looping through the data using the plugin; however, it only draws one arc (presumably only pulling from the last iteration of the loop).

To get a visual representation, please visit: https://i.stack.imgur.com/WTbu7.jpg

I appreciate your time and consideration in helping me with this matter!

javascriptjsonloopsplugins

Answer №1

The function map.arc() will always destroy the previous arc when it is called within a loop, resulting in only the last arc being shown.

To create multiple arcs using map.arc(), the correct structure should be as follows:

map.arc([
   {
    origin: {
        latitude: 40.639722,
        longitude: 73.778889
    },
    destination: {
        latitude: 37.618889,
        longitude: -122.375
    }
  },
  {
      origin: {
          latitude: 30.194444,
          longitude: -97.67
      },
      destination: {
          latitude: 25.793333,
          longitude: -0.290556
      }
  }
], {strokeWidth: 2});

In your code, you have repeated the call to map.arc() without any changes, creating duplicate arcs:

map.arc([
   {
    origin: {
        latitude: 40.639722,
        longitude: 73.778889
    },
    destination: {
        latitude: 37.618889,
        longitude: -122.375
    }
  },
  {
      origin: {
          latitude: 30.194444,
          longitude: -97.67
      },
      destination: {
          latitude: 25.793333,
          longitude: -0.290556
      }
  }
], {strokeWidth: 2});

map.arc([
   {
    origin: {
        latitude: 40.639722,
        longitude: 73.778889
    },
    destination: {
        latitude: 37.618889,
        longitude: -122.375
    }
  },
  {
      origin: {
          latitude: 30.194444,
          longitude: -97.67
      },
      destination: {
          latitude: 25.793333,
          longitude: -0.290556
      }
  }
], {strokeWidth: 2});

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