how to take max value of bar in d3js(if dupblicates objects are there)

[Somepalli]

Hi  how to take max value of bar in d3js(if dupblicates objects are there). Text labels shows two lables. I need only one.

pls help

ex:      var data = [

              {l: 'a', v: 111},

             {l: 'b', v: 222},

             {l: 'b', v: 100},

             {l: 'c', v: 333},

              {l: 'c', v: 223}];

[steve rickus]

You can use the javascript reduce() and map() functions for things like this...

var data = [

    { l: 'a', v: 111 },

    { l: 'b', v: 222 },

    { l: 'b', v: 100 },

    { l: 'c', v: 333 },

    { l: 'c', v: 223 }
];

// build an object with max values for each key

var maxs = arr.reduce(function(acc, obj) {
    if (obj.v > acc[obj.l]) {
        acc[obj.l] = obj.v
    };
    return acc;
});

// rebuild the data array with only the max values
data = Object.keys(maxs).map(function(key) {
    return { l: key, v: maxs[key] };
});

--

Steve