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PHP has hundreds of base functions and thousands more from extensions. Prior to PHP version 5.3.0, functions are not first-class functions and can only be referenced by their name, whereas PHP 5.3.0 introduces closures. User-defined functions can be created at any time and without being prototyped.
4×10 −13 [i] (1.108 × 10 4 kg) Not traded. Used in brachytherapy until 1960s, [59] currently radon is not used commercially. [60] 87: Fr: Francium: 1.87 ~ 1×10 −18 [i] (2.77 × 10 −2 kg) Not traded. Only quantities of the order of millions of atoms have been obtained for research. [61] Most stable isotope, 223 Fr, has half-life of 22 ...
This list of Internet top-level domains (TLD) contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet. A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database. [ 1 ]
List of chemical elements. 118 chemical elements have been identified and named officially by IUPAC. A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z ). [ 1]
This is a list of published [note 1] standards and other deliverables of the International Organization for Standardization (ISO). [note 2] For a complete and up-to-date list of all the ISO standards, see the ISO catalogue. [1] The standards are protected by copyright and most of them must be purchased.
The version history of the Android mobile operating system began with the public release of its first beta on November 5, 2007. The first commercial version, Android 1.0, was released on September 23, 2008. The operating system is developed by Google on a yearly cadence since at least 2011. [ 1] New major releases are announced at Google I/O in ...
376 – Andorra (formerly 33 628) 377 – Monaco (formerly 33 93) 378 – San Marino (interchangeably with 39 0549; earlier was allocated 295 but never used) 379 – Vatican City (assigned but uses 39 06698). 38 – formerly assigned to Yugoslavia until its break-up in 1991. 380 – Ukraine. 381 – Serbia.
The periodic table is a tabular arrangement of the chemical elements, organized by their atomic number, electron configuration, and chemical properties. It is a useful tool for understanding the patterns and trends of the elements and their interactions. Learn more about the history, structure, and significance of the periodic table on Wikipedia.