Port of some underscore-js functions for meteor ui.
returns true if arg1 doesn't equals arg2
{{#if $ne "one" "two"}}
one isn't two
{{else}}
one is two
{{/if}}
=> one isn't two
<input type="checkbox" checked={{$ne "one" "two"}}/>
=> <input type="checkbox" checked/>
returns true if arg1 equals arg2
{{#if $eq "one" "two"}}
one is two
{{else}}
one isn't two
{{/if}}
=> one isn't two
<input type="checkbox" checked={{$eq "one" "two"}}/>
=> <input type="checkbox"/>
returns true if arg1 is greater than arg2
{{#if $gt 2 1}}
two is greater than one
{{else}}
one is greater than two
{{/if}}
=> two is greater than one
<input type="checkbox" checked={{$gt value 10}}/>
returns true if arg1 is greater or equals arg2
{{#if $gte 2 1}}
two is greater or equals one
{{else}}
one is greater or equals two
{{/if}}
=> two is greater or equals one
<input type="checkbox" checked={{$gte value 10}}/>
returns true if arg1 is lower than arg2
{{#if $lt 2 1}}
two is lower than one
{{else}}
one is lower than two
{{/if}}
=> one is lower than two
<input type="checkbox" checked={{$lt value 10}}/>
returns true if arg1 is lower or equals arg2
{{#if $lt 2 1}}
two is lower or equals one
{{else}}
one is lower or equals two
{{/if}}
=> one is lower or equals two
<input type="checkbox" checked={{$lt value 10}}/>
returns first value of args if arg is true
returns second value of args if arg is false
returns n-th value of args if arg is a number
returns an empty string if nothing matches
<div class="{{$sw isActive "active"}}"/>
<div class="{{$sw true "active"}}"/>
=> <div class="active"/>
<div class="{{$sw false "active" "inactive"}}"/>
=> <div class="inactive"/>
<div class="{{$sw 3 "one" "two" "three" "four"}}"/>
=> <div class="three"/>
$contains
$indexOf
$lastIndexOf
$min
$max
$first
$last
$flatten
$compact
$intersection
$difference
$keys
$values
$pairs
$invert
$functions
$pick
$omit
$has