Results for “Dynamic memory & ownership”
Small, practical examples. Search by task or narrow things down below.
Allocate an independent copy of a C string
C: Include one extra byte for the terminating null character.
C✓ Tested
Allocate and free a typed array
C: Use sizeof on the pointed-to type and check allocation success before writing.
C✓ Tested
Allocate and initialize a structure
C: Use a compound literal assignment to initialize all ordinary structure fields.
C✓ Tested
Check an array allocation size before multiplying
C: Compare the requested element count against SIZE_MAX divided by element size.
C✓ Tested
Clear an owning pointer after releasing its allocation
C: Assigning NULL helps prevent accidental reuse through the same variable.
C✓ Tested
Create an independent copy of a byte buffer
C: Allocate the exact byte length and copy only after checking the result.
C✓ Tested
Grow an allocation without losing it on failure
C: Assign realloc to a temporary pointer so the original allocation remains available if growth fails.
C✓ Tested
Initialize a byte buffer to zero
C: memset initializes each byte to the chosen unsigned-char value.
C✓ Tested
Store a variable-length payload after a structure header
C: A flexible array member lets one allocation hold metadata and trailing bytes.
C✓ Tested
Swap owned buffers by swapping their pointers
C: Pointer swaps avoid copying the underlying data.
C✓ Tested
Own one dynamically allocated value with unique_ptr
C++: make_unique allocates a value whose lifetime is tied to its owning smart pointer.
C++✓ Tested
Append a dynamic form control
Append a dynamic form control with a standalone Angular component and explicit browser behavior.
Angular✓ Tested