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Scratch 2.0 does not treat procedures as first class structures and has limited file I/O options with Scratch 2.0 Extension Protocol, an experimental extension feature that allows interaction between Scratch 2.0 and other programs. [80] The Extension protocol allows interfacing with hardware boards such as Lego Mindstorms [81] or Arduino. [82]
ScratchJr is a derivative of the Scratch language, which has been used by over 10 million people worldwide. Programming in Scratch requires basic reading skills, however, so the creators saw a need for another language which would provide a simplified way to learn programming at a younger age and without any reading or mathematics required.
The source code of Snap! is GNU Affero General Public License (AGPL) licensed and is hosted on GitHub. [7] The earlier, desktop-based 3.x version's code is available under a license that allows modification for only non-commercial uses and can be downloaded from the UC Berkeley website [ 8 ] or CNET 's download.com and TechTracker download page.
Delta encoding is a way of storing or transmitting data in the form of differences (deltas) between sequential data rather than complete files; more generally this is known as data differencing. Delta encoding is sometimes called delta compression, particularly where archival histories of changes are required (e.g., in revision control software).
An overnight period may be expressed using a slash between two contiguous dates: the night raids of 30/31 May 1942 or raids of 31 May / 1 June 1942. Or use an en dash: (unspaced) raids of 30–31 May 1942; (spaced) raids of 31 May – 1 June 1942. The {} template can keep ages current in infoboxes and so on: {{age|1989|7|23}} returns: 35
In computational theory, Kleene's second recursion theorem provides a form of code-is-data, by proving that a program can have access to its own source code. [8] Code-as-data is also a principle of the Von Neumann architecture, since stored programs and data are both represented as bits in the same memory device. [4] This architecture offers ...
computes the difference in seconds between two time_t values time: returns the current time of the system as a time_t value, number of seconds, (which is usually time since an epoch, typically the Unix epoch). The value of the epoch is operating system dependent; 1900 and 1970 are often used. See RFC 868. clock
Linear block codes have the property of linearity, i.e. the sum of any two codewords is also a code word, and they are applied to the source bits in blocks, hence the name linear block codes. There are block codes that are not linear, but it is difficult to prove that a code is a good one without this property.