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When do you use self in Python? - Stack Overflow You use self when: Defining an instance method It is passed automatically as the first parameter when you call a method on an instance, and it is the instance on which the method was called Referencing a class or instance attribute from inside an instance method Use it when you want to call a method or access a name (variable) on the
php - When should I use self over $this? - Stack Overflow @Sqoo - saying "DO NOT USE self::, use static::" is a strange point to make - those are deliberately not the same operation I think the point you are really making is "it is clearer if you use the actual class name 'MyClass::', rather than 'self::'
What is the purpose of the `self` parameter? Why is it needed? If we assume for a moment that we hadn’t written a length method for our Vector class, we could do this: Vector length_new = length_global v = Vector(3, 4) print(v length_new()) # 5 0 This works because the first parameter of length_global, can be re-used as the self parameter in length_new
oop - What do __init__ and self do in Python? - Stack Overflow Remember, since self is the instance, this is equivalent to saying jeff name = name, which is the same as jeff name = 'Jeff Knupp Similarly, self balance = balance is the same as jeff balance = 1000 0 After these two lines, we consider the Customer object "initialized" and ready for use Be careful what you __init__
Self-Complementing Codes (Excess 3, 84-2-1, 2*421) The 2421, the excess‐3 and the 84-2-1 codes are examples of self‐complementing codes Such codes have the property that the 9’s complement of a decimal number is obtained directly by changing 1’s to 0’s and 0’s to 1’s (i e , by complementing each bit in the pattern)
Difference between this and self in JavaScript - Stack Overflow Here self refers to the WorkerGlobalScope, and this is the standard method for setting event listeners From Mozilla docs: By using self, you can refer to the global scope in a way that will work not only in a window context (self will resolve to window self) but also in a worker context (self will then resolve to WorkerGlobalScope self)
window. open target _self v window. location. href? window open("webpage htm", "_self"); The browser would lockup and die if we had too many DOM nodes When we switched our code to following the accepted answer of: location href = "webpage html"; all was good It took us awhile to figure out what was causing the issue, since it wasn't obvious what made our page periodically fail to load
Explaining the self variable to a beginner - Stack Overflow The reason "self" is there (by convention) is that when the Python runtime sees a call of the form Object Method (Param1,Param2), it calls Method with parameters (Object,Param1,Param2) So if you call that first parameter "self", everyone will know what you are talking about The reason you have to do this is the subject of another question