name: duk_is_valid_index

proto: |
  duk_bool_t duk_is_valid_index(duk_context *ctx, duk_idx_t idx);

stack: |
  [ ... val! ... ]

summary: |
  <p>Validate argument index, return 1 if index is valid, 0 otherwise.</p>

example: |
  if (duk_is_valid_index(ctx, -3)) {
      printf("index -3 is valid\n");
  } else {
      printf("index -3 is not valid\n");
  }

tags:
  - stack

seealso:
  - duk_require_valid_index

introduced: 1.0.0