You have
char *array[size];
That makes array
an array of pointers. Specifically, array
is an array of size
pointers. Each element in the array (array[0]
to array[size-1]
) is of type char *
.
I think it would help if you understood how array
works:
+-------+-------+-------+-------+
| [0] | [1] | [2] | [3] |
+-------+-------+-------+-------+
| | | |
| | | |
| | | |
v v v v
Each of the boxes above represents a pointer, and the arrows are where they are pointing to. The storage for them is not yet assigned to, so they are just "out there", pointing nowhere useful. You can either create memory for them (malloc()
etc., in C, new[]
in C++), or you can point them to some existing location.
You say:
...put some strings in it. If I assign something again to them, they don't replace the previous contents but they keep on appending on the previous contents. How do I correctly clear/reset all of its contents?
It is not clear how you are putting "strings in it". Do you mean you are storing strings in array[0]
..array[size-1]
? How? Are you assigning literal strings to them? Something like:
array[0] = "String";
If you are doing that, then, you can reassign to the pointers and the strings wouldn't append. In other words, if later in your program you do:
array[0] = "Another string";
you are reassigning the pointer array[0]
to point to "Another string"
, and thus you're not appending.
So, in short, we need to see more code, and you may need to understand pointers and arrays better.
Edit: Based upon your edit, the pointers myMainArr[i]
(for i=0
to i=3
), do get reassigned to the corresponding elements from myArrOne
or myArrOne
(not a typo!), depending upon the contents of action
. So, if you printed them (for example, printf("%s\n", myMainArr[0]);
), you shouldn't see any strings being appended. Also, myMainArr
is local to your function function
, so it gets destroyed when your function returns. (Incidentally, your choice of the names array
for an array and function
for a function make it harder to be unambiguous when answering the question!)
If you are having a problem, please post a complete, minimal, compilable code that shows the problem.
Best Answer
Rust Regex in the Find/Replace in Files Sidebar
Rob Lourens of MSFT wrote that the file search uses Rust regex. The Rust language documentation describes the syntax.
JavaScript Regex in the Find/Replace in File Widget
Alexandru Dima of MSFT wrote that the find widget uses JavaScript regex. As Wicktor commented, ECMAScript 5's documentation describes the syntax. So does the MDN JavaScript Regular Expression Guide.
Test the Difference
The find in files sidebar does not support
(?=foobar)
whereas the find in file widget does support that lookahead syntax.Regarding Find/Replace with Groups
To find/replace with groups, use parentheses
()
to group and$1
,$2
,$3
,$n
to replace.Here is an example.
Before:
After: