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curiosity.js
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/* | |
. .-. | |
| `-. | |
`-' `-' | |
*/ | |
[] + {} | |
// "[object Object]" | |
{} + [] | |
// 0 | |
[] - {} | |
// NaN | |
{} - [] | |
// -0 | |
1 + true | |
// 2 | |
1 + [] | |
// "1" | |
true + [] | |
// "true" | |
true + '' | |
// "true" | |
[] == '' | |
// true | |
0 == '' | |
// true | |
0 == [] | |
// true | |
[] == ![] | |
// true | |
Math.cos('') === 1 | |
// true | |
Math.cos([]) === 1 | |
// true | |
0 == '0' | |
// true | |
[] == '0' | |
// false | |
[] == '' | |
// true | |
[...Array(2)] == ',' | |
// true | |
new Array([],null,undefined) == ',,' | |
// true | |
![] == 1 | |
// false | |
![] == 0 | |
// true | |
!![] == 1 | |
// true | |
1 === 1.0 | |
// true | |
1 === 1.9 | |
// false | |
1 === 1.00000000000000009 | |
// true | |
'a' === 'a' | |
// true | |
'a' === new String('a') | |
// false | |
'a' === new String('a').toString() | |
// true | |
var a = 0.1, | |
b = 0.2, | |
c = a + b | |
c === 0.3 | |
// false | |
var x = 1 | |
x += 1 | |
// 2 | |
var x = 1 | |
x-=-!'' | |
// 2 | |
var x = 1 | |
x-=-Math.cos([]) | |
// 2 | |
Math.max() > Math.min() | |
// false | |
Number.MIN_VALUE < 0 | |
// false | |
typeof NaN | |
// "number" | |
typeof [] | |
// "object" | |
typeof {} | |
// "object" | |
typeof null | |
// "object" | |
NaN === NaN | |
// false | |
NaN == NaN | |
// false | |
isNaN(NaN) | |
// true | |
isNaN(null) | |
// false | |
isNaN(undefined) | |
// true | |
isNaN([]) | |
// false | |
isNaN({}) | |
// true | |
[1,2,3] === [1,2,3] | |
// false | |
[1,2,3] == [1,2,3] | |
// false | |
JSON.stringify([1,2,3]) === JSON.stringify([1,2,3]) | |
// true | |
[1, 2, 3] + [4, 5, 6] | |
// "1,2,34,5,6" | |
0..toString() | |
// "0" | |
0 .toString() | |
// "0" | |
[].toString() | |
// "" | |
+new Date() | |
// 1411663624535 | |
+new Date() === Number(new Date) | |
// true | |
+new Date() === (new Date()).getTime() | |
// true | |
+[] | |
// 0 | |
+[] === 0 + [] | |
// false | |
0 + [] | |
// "0" | |
typeof (0 + new Date()) | |
// "string" | |
parseInt("1.let's see") | |
// NaN | |
parseFloat("1.let's see") | |
// 1 | |
parseFloat('123.321try') | |
// 123.321 | |
parseFloat('123.try321') | |
// 123 | |
parseInt(1 / 0, 19) | |
// 18 | |
parseInt('xyz', 36) | |
// 44027 | |
parseInt(['a1', [2, [3, [4]]]], 11) | |
// 111 | |
parseInt('1') === parseFloat('1') | |
// true | |
parseInt('a1', 11) === parseFloat('a1', 11) | |
// false | |
Math.PI ^ 0 | |
// 3 | |
Math.PI ^ [] | |
// 3 | |
Math.PI << [] | |
// 3 | |
Math.PI >> [] | |
// 3 | |
~Math.PI | |
// -4 | |
~~Math.PI | |
// 3 | |
Math.PI - Math.PI % 1 | |
// 3 | |
['1', '7', '11'].map(parseInt) | |
// [1, NaN, 3] | |
Array(16).join('wat' - 1) + ' Batman!' | |
// "NaNNaNNaNNaNNaNNaNNaNNaNNaNNaNNaNNaNNaNNaNNaN Batman!" | |
;(![] + [])[+[]] + | |
(![] + [])[+!+[]] + | |
([![]] + [][[]])[+!+[] + [+[]]] + | |
(![] + [])[!+[] + !+[]] | |
// "fail" | |
('b' + 'a' + + 'a' + 'a').toLowerCase(); | |
// "banana" | |
$=_=>`$=${$};$()`;$() | |
// "$=_=>`$=${$};$()`;$()" | |
console.log((undefined + undefined + "O").toUpperCase()); | |
// NANO | |
console.log((undefined + "O").toUpperCase()); | |
// UNDEFINEDO |
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