collections.js

[1, 2, 3]
{1: 'a', 2: 'b', 3: 'c'}

[
    {eq: 1, foo: "asdfasdf"},
    {eq: 2, foo: "asdfasdfsdfasdf"}
]



a = {
    "aaa": {foo: "foobar"},
    "bbb": {foo: "alpha"}
}


a["aaa"] == {foo: "foobar"};

a["aaa"]["foo"] == "foobar"

[
1 ---> x
2 ---> y
3 ---> z
]

var a = [1, 2, 3];
var h = {1: 'a', 2: 'b', 3: 'c'};

var c = [[1, 3, 4], [1, 4, 8], [3, 4, 5]]
var c2 = [['a', 'b', 'c'], ['c', 'd', 'd']]


var mapFunc = function (e) {
    return [e];
};
var b = _.map(a, mapFunc);

_.each(a, function (el) {
    jQuery('#aa').append();
});


b == [2, 4, 6];
b == [[1], [2], [3]];

var b = [];
for (var i = 0; i < a.length; i++) {
    for (var j = 0; j < a.le)
    b.push(a[i])
}


var h = {1: 'a', 2: 'b', 3: 'c'};

<select>
    <option value="soemething">sdfd</option>
</select>

var a2 = _.map(h, function (val, key) {
    return "<option value='"+key+"'>"+val+"</option>";
});

a2 = ["<option value='1'>a</option>", "<option value='2'>b</option>"]


a2.join() --> "<option"


a3 = ['a', 'b', 'c']

a3.join("<br />") ---> 'a<br />b<br />c'


var h = {1: 'a', 2: 'b', 3: 'c'};

_.keys(h) ---> [1, 3, 3] 
_.values(h) -> ['a', 'b', 'c']


var eqs = [
  {eqid: 34, name: "a"},
  {eqid: 28, name: "b"},
  {eqid: 232, name: "c"}
]

_.find(eqs, function (eq) {
    return eq['eqid'] == 28;
}) ---> {eqid: 28, name: 'b'}

var eqs2 = {};
_.each(eqs, function (eq) {
    eqs2[eq['eqid']] = {name: eq['name']}
})

var eqs = {
  34: {name: "a"},
  28: {name: "b"},
  232: {name: "c"}
}

eqs[28];

var names = _.map(eqs, function (v, k) { return v.name });
names == ['a', 'b', 'c'];

[{names: 'a'}, {names: 'b'}]


_.each(eqs, function (v, k) {
    aisldflskdjf
})


var ids = var names = _.map(eqs, function (v, k) { return k }) == _.keys(eqs);;
ids == [34, 28, 232]

ids = 

table = "<table>";

_.keys(eqs) ---> [34, 28, 232]

_.each(_.keys(eqs), function (eqId) {
    table += "<tr><td>"+eqs[eqId]+"</td></tr>"
});




var transformed = _.map(collection, function (value, key) { return value });
_.each(collection, function (value, key) { });

var nums = [1, 3, 4, 5, 6, 8, 3]

_.each(nums, function (i) {
    if (isAPrimeNumber(i))
        laskdf
})

var primes = _.filter(nums, function (n) { return isAPrimeNumber(i); })
---> [1,3,5,3]
_.each(primes, function (n) {})


['a', 'b', 'c', 'c']

_.uniq(collection) ---> ['a', 'b', 'c']

{3: "aaa"} === {3: "aaa"}  ---> false

----->
[{3: 'aaa'}, {3: 'aaa'}]    _.map(a, function (v) { return JSON.stringify(v)})
[[3, 'aaa'], [3, 'aaa']]


{3: 'aaa'} ---> "{3: 'aaa'}"

JSON.parse("{3: 'aaa'}")

3 === "3" ---> false
3 == "3"  ---> true
"3" === "3"


a = [[1, 3, 4], [1, 4, 8], [3, 4, 5]]

_.flatten(a) ---> [1, 3, 4, 1, 4, 8, 3, 4, 5]

_.uniq(_.flatten(a))


a.flatten.uniq


map    ---> [a, a, a]
each   ---> 
filter ---> [a, a, a]
find   --->  a
uniq   ---> [a, a]
flatten ---> [a, a, a]
keys   ---> [k, k, k] 
values ---> [v, v, v]

_.each(arr, function (el) {
    console.log(el);
});

arr = [1, 3, 3]

$('div.foo').toArray() ---> [<div>, <div>, <div>]

$('div.foo').each(function () {
    var el = this;
    console.log(el)
});

[<input>, <input>, <input>]

var userValues = $('input[type="text"]').map(function () {
    return this.value;
    return $(this).val();
}).toArray();

---> ['foo', 'bar', 'ccc']


/***************/

var myMongoRecord = {};

$('input[type="text"]').each(function () {
    var input = $(this);
    myMongoRecord[input.attr('name')] = input.val();
})


myMongoRecord == {
    'foo': "something",
    'bar': "something else"
}