ygkn · January 5, 2017 01:29
diff --git a/file0.js b/file0.js
 isNaN("x")        // -> true
 Number.isNaN("x") // -> false
diff --git a/file1.txt b/file1.txt
 myIsNaN =_=>_!==_ ;

 myIsNaN(NaN) // -> true
diff --git a/file2.js b/file2.js
 myIsNaN = _ => _ !== _ ;
diff --git a/file3.js b/file3.js
 myIsNaN = value => value !== value ;
diff --git a/file4.js b/file4.js
 function myIsNaN(value){
  return (value !== value);
 }
diff --git a/file5.js b/file5.js
 myIsNaN =_=>({}).toString.call(_)!=="[object Number]"||_!==_
diff --git a/file6.js b/file6.js
 myIsNaN =_=>!(({}).toString.call(_)==="[object Number]"&&_===_)
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