avoid receiving postmessages from attackers in JavaScript
JavaScript
ðŸ¤– Code Explanation
This function checks whether an event is a valid postMessage. If the event has a different origin than "http://example.com", it returns false. If the data of the event is empty, it also returns false. Otherwise, it returns true.
More problems solved in JavaScript

avoid receiving postmessages from attackers
two functions that make sum two vectors and make their dot product
Calculate the income tax for an income of $70k by adhering to the rules below:
First $10k: 0Â =Â 0
Next $10k: 10Â =Â 10
Following $10k: 20Â =Â 20
Remaining amount: 30
Calculate the income tax for an income of $70k by adhering to the rules below:
First $10k: 0Â =Â 0
Next $10k: 10Â =Â 10
Following $10k: 20Â =Â 20
Remaining amount: 30
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