Created
June 13, 2017 04:30
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Today I Learned - Week 7
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| ---------6/12/2017------------ | |
| Javascript | |
| It can return unexpected results | |
| > 5 + "2" => "52" | |
| > 5 - "2" => 3 | |
| parseInt("342") | |
| 342.toString() | |
| type comparison: 5 === '5' => false (strict) | |
| 5 == '5' => true (loose) | |
| Javascript falseys: | |
| false, null, undefined, 0, "", NaN | |
| Math.floor() round down the number (10.9 => 10) | |
| Math.ceil() round up the number (10.9 => 11) | |
| Javascript constructors: similar to Class in Ruby | |
| function Car(model, make, year) { | |
| this.model = model; | |
| this.make = make; | |
| this.year = year; | |
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