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The type of value a variable contains can change during a script run, so the same variable may start off containing a number, then later a string, and then a list of values. This “type fluidity” allows people to work in a very flexible way, manipulating values at will, and treating each value according to how it is being used at a given ...
Software timekeeping systems vary widely in the resolution of time measurement; some systems may use time units as large as a day, while others may use nanoseconds.For example, for an epoch date of midnight UTC (00:00) on 1 January 1900, and a time unit of a second, the time of the midnight (24:00) between 1 January 1900 and 2 January 1900 is represented by the number 86400, the number of ...
If an entity is temporarily unavailable, this instructs the client to try again later. Value could be a specified period of time (in seconds) or a HTTP-date. [56] Example 1: Retry-After: 120; Example 2: Retry-After: Fri, 07 Nov 2014 23:59:59 GMT; Permanent RFC 9110: Server: A name for the server: Server: Apache/2.4.1 (Unix) Permanent RFC 9110 ...
Objects are manipulated using methods instead of traditional functions. In ooRexx, a string variable is a reference to a string object and does not need to be declared, which reduces the effort for programmers compared to strictly typed languages. [34] A string object can be of any length and contain any characters, including numerical values.
In methods that have a return value of type Task<T>, methods declared with async must have a return statement of type assignable to T instead of Task<T>; the compiler wraps the value in the Task<T> generic. It is also possible to await methods that have a return type of Task or Task<T> that are declared without async.
The maximum value of a signed 32-bit integer is 2 31 − 1, and the minimum value is −2 31, making it impossible to represent dates before 13 December 1901 (at 20:45:52 UTC) or after 19 January 2038 (at 03:14:07 UTC). The early cutoff can have an impact on databases that are storing historical information; in some databases where 32-bit Unix ...
On 5 January 1975, the 12-bit field that had been used for dates in the TOPS-10 operating system for DEC PDP-10 computers overflowed, in a bug known as "DATE75". The field value was calculated by taking the number of years since 1964, multiplying by 12, adding the number of months since January, multiplying by 31, and adding the number of days since the start of the month; putting 2 12 − 1 ...
SPARQL (pronounced "sparkle", a recursive acronym [2] for SPARQL Protocol and RDF Query Language) is an RDF query language—that is, a semantic query language for databases—able to retrieve and manipulate data stored in Resource Description Framework (RDF) format.