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johnkawakami/gist:e94bd21d774c482a86e4

Created June 4, 2015 20:04
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jQuery, lodash, senators, simple example
Raw
gistfile1.html
<html>
<head>
<script src="lodash.js"></script>
<script src="jquery-2.1.4.js"></script>
</head>
<body>
<p>
California's delegation: <span id="cal"></span>
</p>
<p>
Average age in the Senate: <span id="average"></span>
</p>
<script>
var a = [
{ "name":"Dianne Feinstein", "state":"California", "birthdate":"06/22/33" },
{ "name":"Chuck Grassley", "state":"Iowa", "birthdate":"09/17/33" },
{ "name":"Orrin Hatch", "state":"Utah", "birthdate":"03/22/34" },
{ "name":"Richard Shelby", "state":"Alabama", "birthdate":"05/06/34" },
{ "name":"Jim Inhofe", "state":"Oklahoma", "birthdate":"11/17/34" },
{ "name":"Pat Roberts", "state":"Kansas", "birthdate":"04/20/36" },
{ "name":"Barbara Mikulski", "state":"Maryland", "birthdate":"07/20/36" },
{ "name":"John McCain", "state":"Arizona", "birthdate":"08/29/36" },
{ "name":"Thad Cochran", "state":"Mississippi", "birthdate":"12/07/37" },
{ "name":"Harry Reid", "state":"Nevada", "birthdate":"12/02/39" },
{ "name":"Patrick Leahy", "state":"Vermont", "birthdate":"03/31/40" },
{ "name":"Lamar Alexander", "state":"Tennessee", "birthdate":"07/03/40" },
{ "name":"Barbara Boxer", "state":"California", "birthdate":"11/11/40" },
{ "name":"Bernie Sanders", "state":"Vermont", "birthdate":"09/08/41" },
{ "name":"Mitch McConnell", "state":"Kentucky", "birthdate":"02/20/42" },
{ "name":"Bill Nelson", "state":"Florida", "birthdate":"09/29/42" },
{ "name":"Jim Risch", "state":"Idaho", "birthdate":"05/03/43" },
{ "name":"Dan Coats", "state":"Indiana", "birthdate":"05/16/43" },
{ "name":"Ben Cardin", "state":"Maryland", "birthdate":"10/05/43" },
{ "name":"Mike Enzi", "state":"Wyoming", "birthdate":"02/01/44" },
{ "name":"Angus King", "state":"Maine", "birthdate":"03/31/44" },
{ "name":"Dick Durbin", "state":"Illinois", "birthdate":"11/21/44" },
{ "name":"Johnny Isakson", "state":"Georgia", "birthdate":"12/28/44" },
{ "name":"Richard Blumenthal", "state":"Connecticut", "birthdate":"02/13/46" },
{ "name":"Ed Markey", "state":"Massachusetts", "birthdate":"07/11/46" },
{ "name":"Jeff Sessions", "state":"Alabama", "birthdate":"12/24/46" },
{ "name":"Tom Carper", "state":"Delaware", "birthdate":"01/23/47" },
{ "name":"Jeanne Shaheen", "state":"New Hampshire", "birthdate":"01/28/47" },
{ "name":"Joe Manchin", "state":"West Virginia", "birthdate":"08/24/47" },
{ "name":"Mazie Hirono", "state":"Hawaii", "birthdate":"11/03/47" },
{ "name":"Tom Udall", "state":"New Mexico", "birthdate":"05/18/48" },
{ "name":"Ron Wyden", "state":"Oregon", "birthdate":"05/03/49" },
{ "name":"Elizabeth Warren", "state":"Massachusetts", "birthdate":"06/22/49" },
{ "name":"Jack Reed", "state":"Rhode Island", "birthdate":"11/12/49" },
{ "name":"David Perdue", "state":"Georgia", "birthdate":"12/10/49" },
{ "name":"Roy Blunt", "state":"Missouri", "birthdate":"01/10/50" },
{ "name":"Debbie Stabenow", "state":"Michigan", "birthdate":"04/29/50" },
{ "name":"Patty Murray", "state":"Washington", "birthdate":"10/11/50" },
{ "name":"Chuck Schumer", "state":"New York", "birthdate":"11/23/50" },
{ "name":"John Boozman", "state":"Arkansas", "birthdate":"12/10/50" },
{ "name":"Deb Fischer", "state":"Nebraska", "birthdate":"03/01/51" },
{ "name":"Mike Crapo", "state":"Idaho", "birthdate":"05/20/51" },
{ "name":"Al Franken", "state":"Minnesota", "birthdate":"05/21/51" },
{ "name":"Roger Wicker", "state":"Mississippi", "birthdate":"07/05/51" },
{ "name":"John Cornyn", "state":"Texas", "birthdate":"02/02/52" },
{ "name":"John Barrasso", "state":"Wyoming", "birthdate":"07/21/52" },
{ "name":"Bob Corker", "state":"Tennessee", "birthdate":"08/24/52" },
{ "name":"Sherrod Brown", "state":"Ohio", "birthdate":"11/09/52" },
{ "name":"Susan Collins", "state":"Maine", "birthdate":"12/07/52" },
{ "name":"Claire McCaskill", "state":"Missouri", "birthdate":"07/24/53" },
{ "name":"Shelley Moore Capito", "state":"West Virginia", "birthdate":"11/26/53" },
{ "name":"Bob Menendez", "state":"New Jersey", "birthdate":"01/01/54" },
{ "name":"Jerry Moran", "state":"Kansas", "birthdate":"05/29/54" },
{ "name":"Mike Rounds", "state":"South Dakota", "birthdate":"10/24/54" },
{ "name":"Mark Warner", "state":"Virginia", "birthdate":"12/15/54" },
{ "name":"Ron Johnson", "state":"Wisconsin", "birthdate":"04/08/55" },
{ "name":"Lindsey Graham", "state":"South Carolina", "birthdate":"07/09/55" },
{ "name":"Joe Donnelly", "state":"Indiana", "birthdate":"09/29/55" },
{ "name":"Sheldon Whitehouse", "state":"Rhode Island", "birthdate":"10/20/55" },
{ "name":"Heidi Heitkamp", "state":"North Dakota", "birthdate":"10/30/55" },
{ "name":"Richard Burr", "state":"North Carolina", "birthdate":"11/30/55" },
{ "name":"Rob Portman", "state":"Ohio", "birthdate":"12/19/55" },
{ "name":"Jon Tester", "state":"Montana", "birthdate":"08/21/56" },
{ "name":"Jeff Merkley", "state":"Oregon", "birthdate":"10/24/56" },
{ "name":"John Hoeven", "state":"North Dakota", "birthdate":"03/13/57" },
{ "name":"Lisa Murkowski", "state":"Alaska", "birthdate":"05/22/57" },
{ "name":"Bill Cassidy", "state":"Louisiana", "birthdate":"09/28/57" },
{ "name":"Tim Kaine", "state":"Virginia", "birthdate":"02/26/58" },
{ "name":"Maria Cantwell", "state":"Washington", "birthdate":"10/13/58" },
{ "name":"Gary Peters", "state":"Michigan", "birthdate":"12/01/58" },
{ "name":"Mark Kirk", "state":"Illinois", "birthdate":"09/15/59" },
{ "name":"Bob Casey, Jr.", "state":"Pennsylvania", "birthdate":"04/13/60" },
{ "name":"Dean Heller", "state":"Nevada", "birthdate":"05/10/60" },
{ "name":"Amy Klobuchar", "state":"Minnesota", "birthdate":"05/25/60" },
{ "name":"Thom Tillis", "state":"North Carolina", "birthdate":"08/30/60" },
{ "name":"John Thune", "state":"South Dakota", "birthdate":"01/07/61" },
{ "name":"David Vitter", "state":"Louisiana", "birthdate":"05/03/61" },
{ "name":"Pat Toomey", "state":"Pennsylvania", "birthdate":"11/17/61" },
{ "name":"Tammy Baldwin", "state":"Wisconsin", "birthdate":"02/11/62" },
{ "name":"Steve Daines", "state":"Montana", "birthdate":"08/20/62" },
{ "name":"Jeff Flake", "state":"Arizona", "birthdate":"12/31/62" },
{ "name":"Rand Paul", "state":"Kentucky", "birthdate":"01/07/63" },
{ "name":"Chris Coons", "state":"Delaware", "birthdate":"09/09/63" },
{ "name":"Dan Sullivan", "state":"Alaska", "birthdate":"11/13/64" },
{ "name":"Michael Bennet", "state":"Colorado", "birthdate":"11/28/64" },
{ "name":"Tim Scott", "state":"South Carolina", "birthdate":"09/19/65" },
{ "name":"Kirsten Gillibrand", "state":"New York", "birthdate":"12/09/66" },
{ "name":"James Lankford", "state":"Oklahoma", "birthdate":"03/04/68" },
{ "name":"Kelly Ayotte", "state":"New Hampshire", "birthdate":"06/27/68" },
{ "name":"Cory Booker", "state":"New Jersey", "birthdate":"04/27/69" },
{ "name":"Joni Ernst", "state":"Iowa", "birthdate":"07/01/70" },
{ "name":"Ted Cruz", "state":"Texas", "birthdate":"12/22/70" },
{ "name":"Marco Rubio", "state":"Florida", "birthdate":"05/28/71" },
{ "name":"Mike Lee", "state":"Utah", "birthdate":"06/04/71" },
{ "name":"Martin Heinrich", "state":"New Mexico", "birthdate":"10/17/71" },
{ "name":"Ben Sasse", "state":"Nebraska", "birthdate":"02/22/72" },
{ "name":"Brian Schatz", "state":"Hawaii", "birthdate":"10/20/72" },
{ "name":"Chris Murphy", "state":"Connecticut", "birthdate":"08/03/73" },
{ "name":"Cory Gardner", "state":"Colorado", "birthdate":"08/22/74" },
{ "name":"Tom Cotton", "state":"Arkansas", "birthdate":"05/13/77" }
];
var seconds_to_years = function(s) {
return Math.floor(s / (60*60*24*365*1000));
};
var a_with_ages = _(a).map( function(o) {
o.age = seconds_to_years(Date.now() - Date.parse(o.birthdate));
return o;
});
var california = _(a_with_ages).filter({'state':'California'})
$('#cal').text( JSON.stringify(
california
));
var sum = function(total, x) {
return total + x;
};
$('#average').text(
_(a_with_ages).pluck('age').reduce(sum) / a.length
);
</script>
</html>
@johnkawakami
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johnkawakami commented Jun 4, 2015 

        var average = function(o) { return _(o).sum() / _(o).size(); };
        _.mixin({'average':average}, {'chain':false});
        $('#average').text( 
            _(a_with_ages).pluck('age').average()
        );

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