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In all versions of Python, boolean operators treat zero values or empty values such as "", 0, None, 0.0, [], and {} as false, while in general treating non-empty, non-zero values as true. The boolean values True and False were added to the language in Python 2.2.1 as constants (subclassed from 1 and 0 ) and were changed to be full blown ...
Moves the cursor left (but may "backwards wrap" if cursor is at start of line). ^I: 0x09: HT: Tab: Moves the cursor right to next tab stop. ^J: 0x0A: LF: Line Feed: Moves to next line, scrolls the display up if at bottom of the screen. Usually does not move horizontally, though programs should not rely on this. ^L: 0x0C: FF: Form Feed: Move a ...
Move to beginning of line Home: Home: Ctrl+A. or Home. Move to end of line End: End: Ctrl+E. or End. Reverse search of history F8: F8: Ctrl+R: Pause execution of the current job Ctrl+Z: Insert the next character typed verbatim Ctrl+V: Autocomplete command/file name Tab ↹ (enabled by default in Windows XP and later) Tab ↹: Tab ↹ (usually ...
Some codecs will analyze a longer segment, called a frame, of the data to optimize efficiency, and then code it in a manner that requires a larger segment of data at one time to decode. The inherent latency of the coding algorithm can be critical; for example, when there is a two-way transmission of data, such as with a telephone conversation ...
These are the standard shortcuts: Control-Z (or ⌘ Command+Z) to undo; Control-X (or ⌘ Command+X) to cut; Control-C (or ⌘ Command+C) to copy; Control-V (or ⌘ Command+V) to paste; The IBM Common User Access (CUA) standard also uses combinations of the Insert, Del, Shift and Control keys. Early versions of Windows used the IBM standard.
Larry Tesler created the concept of cut, copy, paste, and undo for human-computer interaction while working at Xerox PARC to control text editing.During the development of the Macintosh it was decided that the cut, paste, copy and undo would be used frequently and assigned them to the ⌘-Z (Undo), ⌘-X (Cut), ⌘-C (Copy), and ⌘-V (Paste).
The loop body is executed "for" the given values of the loop variable. This is more explicit in ALGOL versions of the for statement where a list of possible values and increments can be specified. In Fortran and PL/I, the keyword DO is used for the same thing and it is named a do-loop; this is different from a do while loop.
Standard examples of data-driven languages are the text-processing languages sed and AWK, [1] and the document transformation language XSLT, where the data is a sequence of lines in an input stream – these are thus also known as line-oriented languages – and pattern matching is primarily done via regular expressions or line numbers.