String.prototype.swapcase = function(){ return this.replace(/([a-z])|([A-Z])/g,function($0,$1,$2){ return ($1) ? $0.toUpperCase() : $0.toLowerCase() }) }
"abcdeABCDE".swapcase() => ABCDEabcde
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String.prototype.swapcase = function(){ return this.replace(/([a-z])|([A-Z])/g,function($0,$1,$2){ return ($1) ? $0.toUpperCase() : $0.toLowerCase() }) }
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