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With respect to a language definition, the syntax of Comments can be classified many ways, including: Line vs. block – a line comment starts with a delimiter and continues to the end of the line (newline marker) whereas a block comment starts with one delimiter and ends with another and can cross lines
do end: f do ensure tag: expression end: f do check tag: expression end end: class X invariant tag: expression end: from instructions invariant tag: expression until expr loop instructions variant tag: expression end: Python — PHP Perl Raku PRE {condition } POST {condition } Ruby — Windows PowerShell OCaml F# COBOL
Rest parameters are similar to Javascript's arguments object, which is an array-like object that contains all of the parameters (named and unnamed) in the current function call. Unlike arguments , however, rest parameters are true Array objects, so methods such as .slice() and .sort() can be used on them directly.
A block comment is delimited with text that marks the start and end of comment text. It can span multiple lines or occupy any part of a line. Some languages allow block comments to be recursively nested inside one another, but others do not. [5] [6] [7] A line comment ends at the end of the text line.
Comparison of Java and .NET platforms ALGOL 58's influence on ALGOL 60; ALGOL 60: Comparisons with other languages; Comparison of ALGOL 68 and C++; ALGOL 68: Comparisons with other languages; Compatibility of C and C++; Comparison of Pascal and Borland Delphi; Comparison of Object Pascal and C; Comparison of Pascal and C; Comparison of Java and C++
A JavaScript engine may be a traditional interpreter, or it may utilize just-in-time compilation to bytecode in some manner. A JavaScript engine is most commonly included in web browsers, but is also a key component of JavaScript runtime environments and other software (such as database management systems). Comparison of JavaScript engines
^d END-IF may be used instead of the period at the end. ^e In Rust, the comma (,) at the end of a match arm can be omitted after the last match arm, or after any match arm in which the expression is a block (ends in possibly empty matching brackets {}).
As objects are made up of several different parts, copying becomes nontrivial. Several strategies exist to treat this problem. Consider an object A, which contains fields x i (more concretely, consider if A is a string and x i is an array of its characters). There are different strategies for making a copy of A, referred to as shallow copy and ...