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def myassert(cond : => Boolean) = {
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try {
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assert(cond)
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} catch {
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case _ : Throwable => System.exit(1)
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}
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myassert(get_first_price("GOOG", 1980) == None)
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myassert(get_first_price("GOOG", 2010) == Some(312.204773))
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