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Bookmark or Share- c - Difference between char* and const char*? - Stack Overflow@lorem1213 ((char*)astr)[0] = 'X';: This line casts the constant pointer astr to a non-constant character pointer using a type cast (char*). This is a dangerous practice as it bypasses the intended const-ness of the variable and can lead to undefined behavior and potential program crashes.
- Math constant PI value in C - Stack Overflow"All the expressions in an initializer for an object that has static or thread storage duration shall be constant expressions or string literals" (C2011, 6.7.9/4). It's not clear to me what characteristics you do hope to have in an alternative that does not rely on a macro, but that's one of the main things you're up against. –
- How to declare a constant in Java? - Stack Overflowindeed, it isn't compile-time constant. However, the definition "In computer programming, a constant is a value that cannot be altered by the program during normal execution, i.e., the value is constant" does not strictly require it being compile-time constant, but a run-time one, so this answer is still correct. –
- How do I create a constant in Python? - Stack OverflowA constant can be set up, but can not be changed or deleted. Value of constant may any immutable type, as well as list or set. Besides if value of a constant is list or set, it will be converted in an immutable type as next: list -> tuple set -> frozenset Dict as value of a constant has no support.
- Add column with constant value to pandas dataframeWhat is the simplest way to add a new column containing a constant value eg 0? A B C new 1 1.764052 0.400157 0.978738 0 2 2.240893 1.867558 -0.977278 0 3 0.950088 -0.151357 -0.103219 0
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