Compare two dates - Node.js Date

Node.js examples for Date:Compare

  1. HOME
  2. Node.js
  3. Date
  4. Compare

Description

Compare two dates

Demo Code


compare: function(a,b) {
    // Compare two dates (could be of any type supported by the convert
    // function above) and returns:
    //  -1 : if a < b
    //   0 : if a = b
    //   1 : if a > b
    // NaN : if a or b is an illegal date
    // NOTE: The code inside isFinite does an assignment (=).
    return (/*from w  w w .  j  a v  a2s .c  o  m*/
        isFinite(a=this.convert(a).valueOf()) &&
        isFinite(b=this.convert(b).valueOf()) ?
        (a>b)-(a<b) :
        NaN
    )
},
convert: function(d) {
    // Converts the date in d to a date-object. The input can be:
    //   a date object: returned without modification
    //  an array      : Interpreted as [year,month,day]. NOTE: month is 0-11.
    //   a number     : Interpreted as number of milliseconds
    //                  since 1 Jan 1970 (a timestamp)
    //   a string     : Any format supported by the javascript engine, like
    //                  "YYYY/MM/DD", "MM/DD/YYYY", "Jan 31 2009" etc.
    //  an object     : Interpreted as an object with year, month and date
    //                  attributes.  **NOTE** month is 0-11.
    return (
        d.constructor === Date ? d :
        d.constructor === Array ? new Date(d[0],d[1],d[2]) :
        d.constructor === Number ? new Date(d) :
        d.constructor === String ? new Date(d) :
        typeof d === 'object' ? new Date(d.year,d.month,d.date) :
        NaN
    )
}

Related Tutorials