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  2. Recfiles - Wikipedia

    en.wikipedia.org/wiki/Recfiles

    Databases using this file format can be edited using any text editor. Recfiles allow for basic relational database operations, such as typing, auto-incrementing, as well as a simple join operation. Recutils is a collection of tools, like recfmt, recsel, and rec2csv used to work with recfile databases. [4] Various software libraries support the ...

  3. List of filename extensions (A–E) - Wikipedia

    en.wikipedia.org/wiki/List_of_filename_extensions...

    Windows Event log file Microsoft Windows NT 4.0 - XP; Microsoft Event Viewer: EVTX: Windows Event log file XML structured Microsoft Windows Vista, 7, 8; Microsoft Event Viewer: EX: Elixir source code file Elixir programming language running on BEAM (Erlang virtual machine) [90] EXE: Directly executable program DOS, OpenVMS, Microsoft Windows ...

  4. pandas (software) - Wikipedia

    en.wikipedia.org/wiki/Pandas_(software)

    [4]: 114 A DataFrame is a 2-dimensional data structure of rows and columns, similar to a spreadsheet, and analogous to a Python dictionary mapping column names (keys) to Series (values), with each Series sharing an index. [4]: 115 DataFrames can be concatenated together or "merged" on columns or indices in a manner similar to joins in SQL.

  5. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    Windows Event Viewer file format 45 6C 66 46 69 6C 65: ElfFile: 0 evtx Windows Event Viewer XML file format 73 64 62 66: sdbf: 8 sdb Windows customized database 50 4D 43 43: PMCC: 0 grp Windows 3.x Program Manager Program Group file format 4B 43 4D 53: KCMS: 0 icm ICC profile: 72 65 67 66: regf: 0 dat hiv Windows Registry file 21 42 44 4E!BDN ...

  6. Append - Wikipedia

    en.wikipedia.org/wiki/Append

    Following Lisp, other high-level programming languages which feature linked lists as primitive data structures have adopted an append. To append lists, as an operator, Haskell uses ++, OCaml uses @. Other languages use the + or ++ symbols to nondestructively concatenate a string, list, or array.

  7. Comparison of executable file formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_executable...

    Extension (Novell/Caldera VERSION etc.) No Extension Extension Extension No No MZ (GEM) GEM, ViewMAX.APP/.ACC: No (x86 only) Yes No No Un­known Un­known No No Un­known NE: MS-DOS 4.0 (multitasking), OS/2, Windows, HX DOS Extender.EXE: Un­known Un­known Un­known No Un­known Un­known No Only MZ (DOS) [11] Yes LE, (W3, W4)

  8. List of file formats - Wikipedia

    en.wikipedia.org/wiki/List_of_file_formats

    Some filenames are given extensions longer than three characters. While MS-DOS and NT always treat the suffix after the last period in a file's name as its extension, in UNIX-like systems, the final period does not necessarily mean that the text after the last period is the file's extension. [1]

  9. Filename extension - Wikipedia

    en.wikipedia.org/wiki/Filename_extension

    The FAT file system for DOS and Windows stores file names as an 8-character name and a three-character extension. The period character is not stored. The High Performance File System (HPFS), used in Microsoft and IBM's OS/2 stores the file name as a single string, with the "." character as just another character in the file name.