Question

67

Get max and min dates from an array

rated 0 times [ 68] [ 1] / answers: 1 / hits: 29518 / 9 Years ago, mon, june 8, 2015, 12:00:00

I have sample data as:

data = [

  [1, 622, 782, 783, 2015-04-21],

  [2, 622, 782, 783, 2015-04-21],

  [3, 622, 782, 783, 2015-04-22],

  [4, 622, 782, 783, 2015-04-23],

  [5, 622, 782, 783, 2015-04-24],

  [6, 622, 782, 783, 2015-04-28],

  [7, 622, 782, 783, 2015-04-28],

  [8, 622, 782, 783, 2015-04-29],

  [9, 622, 782, 783, 2015-05-04],

  [10, 622, 782, 783, 2015-05-05]

]

How can I get the max date value and min date value from the above data? The data may be not in sorted order.

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lamarmaximiliand

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answered 9 Years ago emilianoc · Accepted Answer

1) Use map to extract the dates:

var dates = data.map(function(x) { return new Date(x[4]); })

2) Use Math.max / Math.min to get the highest / lowest dates:

var latest = new Date(Math.max.apply(null,dates));

var earliest = new Date(Math.min.apply(null,dates));