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  2. Missing data - Wikipedia

    en.wikipedia.org/wiki/Missing_data

    Values in a data set are missing completely at random (MCAR) if the events that lead to any particular data-item being missing are independent both of observable variables and of unobservable parameters of interest, and occur entirely at random. [5]

  3. List of HTTP header fields - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_header_fields

    A few fields can contain comments (i.e. in User-Agent, Server, Via fields), which can be ignored by software. [8] Many field values may contain a quality (q) key-value pair separated by equals sign, specifying a weight to use in content negotiation. [9]

  4. Uninitialized variable - Wikipedia

    en.wikipedia.org/wiki/Uninitialized_variable

    Note that in the example, the variable i is initialized to zero by the first clause of the for statement. Another example can be when dealing with structs. In the code snippet below, we have a struct student which contains some variables describing the information about a student.

  5. Comma-separated values - Wikipedia

    en.wikipedia.org/wiki/Comma-separated_values

    An optional header record (there is no sure way to detect whether it is present, so care is required when importing). Each record should contain the same number of comma-separated fields. Any field may be quoted (with double quotes). Fields containing a line-break, double-quote or commas should be quoted. (If they are not, the file will likely ...

  6. Here document - Wikipedia

    en.wikipedia.org/wiki/Here_document

    The delimiters around the tag have the same effect within the here doc as they would in a regular string literal: For example, using double quotes around the tag allows variables to be interpolated, but using single quotes doesn't, and using the tag without either behaves like double quotes. Using backticks as the delimiters around the tag runs ...

  7. Data structure alignment - Wikipedia

    en.wikipedia.org/wiki/Data_structure_alignment

    This leads to interoperability problems with library headers which use, for example, #pragma pack(8), if the project packing is smaller than this. For this reason, setting the project packing to any value other than the default of 8 bytes would break the #pragma pack directives used in library headers and result in binary incompatibilities ...

  8. Pointer (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Pointer_(computer_programming)

    A pointer a pointing to the memory address associated with a variable b, i.e., a contains the memory address 1008 of the variable b.In this diagram, the computing architecture uses the same address space and data primitive for both pointers and non-pointers; this need not be the case.

  9. Stack trace - Wikipedia

    en.wikipedia.org/wiki/Stack_trace

    Generally, the activation record stores the function's arguments and local variables. What exactly it contains and how it's laid out is determined by the calling convention. Programmers commonly use stack tracing during interactive and post-mortem debugging.