On 16/6/2013 12:22 μμ, Denis McMahon wrote:
On Sun, 16 Jun 2013 11:07:12 +0300, Nick the Gr33k wrote:
On 16/6/2013 9:32 πμ, Denis McMahon wrote:
On Sat, 15 Jun 2013 19:18:53 +0300, Nick the Gr33k wrote:
In both situations we still have 2 memory units holding values, so
hows that different?
Consider that each named variable is a pointer to a memory location
that holds a value. This is one of the ways in that a typed compiled
language and an untyped scripted language may differ in their treatment
of data items (or variables).
Consider the following C and Python code:
C:
int a, b;
b = 6;
a = b;
In C, this places the numeric value 6 into the memory location
identified by the variable "b", then copies the value from the location
pointed to by "b" into the location pointed to by "a".
b is a pointer to a memory location containing the value 6 a is a
pointer to another memory location also containing the value 6
Python:
b = 6
a = b
In Python, this first puts the value 6 in in a memory location and
points "b" at that memory location, then makes "a" point to the same
memory location as "b" points to.
b is a pointer to a memory location containing the value 6 a is a
pointer to the same memory location
Do you understand the difference?
Yes and thank you for explaining in detail to me.
So Python economies(saves) system's memory. Good job Python!
No. Don't read that into it.
For example, in Python
a = 6
b = a
c = 6
a and b point to one memory location that contains the value 6
c points to a different memory location that contains the value 6
I believe you are mistaken.
a here is not a pointer but variable,
which is a memory location that stores value 6.
b here is a pointer. It's value is the memory location of variable a
which stores value 6.
c here is just te same as a , a variable.
A pointer = a variable that has as a value a memory address a variable =
a memory address that has as a value the actual value we want to store.
These are really C terms, not Python terms. Stop thinking that C is
behaving like Python.
I think it behaves the same way, but lets here from someone else too.
Is this how the thing works?
No.
Python is an interpreted language. C is a compiled language. They present
very different feature sets to the user. You need to understand this, and
at the moment you're not doing so.
Whats the difference of "interpreting " to "compiling" ?
I have also asked other things too which you didn't quote, please do.
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What is now proved was at first only imagined!
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