javascript functions for will.

functions.js

//_.compact

var x = [0, 17, 322, '', 2354];
var newX = _.compact(x);
//newX is [17, 322, 2354]

// Usefulness: In a massive program, im thinking like bank numbers or credit-card numbers, something like _.compact would be useful because it could discard numbers that were typed incorrectly.

//_.compact removes things from an array that equate to false, null, NaN, etc. and makes them easier to read.



//_.union
var x = ([1, 2, 3, 4, 13, 25, 64, 101],[1, 2, 13, 6, 1, 25], [2, 4, 4, 101]);
var newX =_.union(x)
// newX = [2, 4, 101]

//Usefulness: I think that _.union could come in handy when doing things like statistics or in finding averages.

//_.union is used to combine repeated numbers in multiple arrays into one array



// _.once
function agreeToTerms() {console.log('I agree');}

var newTerms = _.once(agreeToTerms);

// newTerms(); Logs 'I agree'
// newTerms(); noting happens

//_.once is used to create a new function that only runs one time. i.e. a Terms of Service agreement.

//_.compose

var greet = function(name){return "Hello: " + name; };
var exclaim = function(statement){return statement.toUpperCase() + "!"; }; 
var welcome = _.compose(greet, exclaim);
var output = welcome('jordan ' + 'wilhite');


// logs Hello: JORDAN WILHITE!
// can be used as a login prompt



//_.keys

var x = ({seven: 7, twelve: 12, thirty: 30});
var newX = _.keys(x);
// ['seven', 'twelve', 'thirty']

//_.values
var x = ({one: 1, two: 2, three: 3});
var newX = _.values(x);
// [1, 2, 3]
// _.keys and _.values work in similar fashions. _.keys takes looks at both the id and the number and logs the id and ignores the number. _.values looks at the id and the value and logs the value and ignores the id.

//_.random

var x = '';
var newX = _.random(0, 800000000);
//newX = a random number each time it's ran. For instance, for me, it logged 159212083, 330480747, & 667582456 on three seperate occasions.

// _.random logs a random number in the set range.

//_.now

var x = '';
var newX =_.now();
// newX = 1437536189241
//logs the interger timestamp