It works as an inout to make the variable an in-out parameter. In-out means in fact passing value by reference, not by value. And it requires not only to accept value by reference, by also to pass it by reference, so pass it with & – foo(&myVar) instead of just foo(myVar) As you see you … Read more
With a single set of ampersands, what you get is pretty boring; after one, odd number of ampersands leads to resolving twice, even number of ampersands resolves once. So you use 1 ampersand to resolve once and 3 ampersands to resolve twice, unless you have stock in the company that owns rights to the ampersand. … Read more
scanf accepts a pointer to whatever you are putting the value in. In the first instance, you are passing a reference to the specific int at position i in your integer array. In the second instance you are passing the entire array in to scanf. In C, arrays and pointers are synonymous and can be … Read more
So normally when you use for i in list, the loop variable i would be of type &i32. But when instead you use for &i in list, you are not dereferencing anything, but instead you are using pattern matching to explicitly destructure the reference and that will make i just be of type i32. See … Read more
When calling from cmd.exe, things get tricky; here’s a simplified example: powershell -c “ffmpeg.exe -h “^””User-Agent: usra`r`nCookies: parm=a=1&b=2; session=1″^””” In short: From cmd.exe / batch files, to pass what PowerShell’s CLI should see as a double-quoted argument inside an overall “…” string passed to -Command (-c): In Windows PowerShell (powershell.exe): use “^””…”^”” (sic) In PowerShell … Read more
For Sass versions 3.2 and older, these are all of the valid ways to use the parent selector: .foo { &, &.bar, &#bar, &:after, &[active] { color: red; } } .foo { .bar & { color: red; } } As of Sass 3.3, this is valid: .foo { &bar, &-bar { color: red; } } … Read more
The & has more the one meanings: 1) take the address of a variable int x; void* p = &x; //p will now point to x, as &x is the address of x 2) pass an argument by reference to a function void foo(CDummy& x); //you pass x by reference //if you modify x inside … Read more
& is used to separate commands. Therefore you can use ^ to escape the &.
When your XML contains &, this will result in the text &. When you use that in HTML, that will be rendered as &.
and tests whether both expressions are logically True while & (when used with True/False values) tests if both are True. In Python, empty built-in objects are typically treated as logically False while non-empty built-ins are logically True. This facilitates the common use case where you want to do something if a list is empty and … Read more