Which of the below author is not a part of GOF (Gang of Four)?

Which of the below author is not a part of GOF (Gang of Four)? Correct Answer Gang Pattern

Four authors named Richard Helm, Erich Gamma, Ralph Johnson and John Vlissides published a book on design patterns. This book initiated the concept of Design Pattern in Software development. They are known as Gang of Four (GOF).
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Related Questions

f(x) =x-1,(x≥1),g(x) =x2 +2  হলে, (gof-1)(x)   এবং        (gof)-1(x) নির্ণয় কর।
Which of the following combinations are correctly matched?
1. Harbour ⇔ Section 51A, Indian Penal Code
2. Wrongful Loss ⇔ Section 23, Indian Penal Code
3. Gang rape on woman under twelve years of age ⇔ Section 376DB, Indian Penal Code
4. Gang rape ⇔ Section 376D, Indian Penal Code
Select the correct answer:
A alongwith his gang members B, C and D holds X down and fraudulently takes X's money and jewels from X's clothes without his consent. Out of the following, what offence A and his gang members committed under Indian Penal Code, 1860:
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2. The author of the novel 'The Corrections' is Jonathan Franzen.
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f(x) =x2,g(x) =x3+1 হলে, (gof) (x) সমান -
ফাংশন f(x) =x2  + 2 এবং g(x) = (x-1)2 হলে, (gof) (x) হচ্ছে -
∫(x)x2+3x এবং g(x) = 1 + x2 হলে,(gof) (2)=?
 f(x)=x2, g(x)=x3+1  হলে (gof) (x) সমান -
f(x)=2x-5 এবং g(x)x2+6 হলে (gof)(2) এর মান কত?