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Like the Memento Calculation field type that game before it, the JavaScript field exists to produce ("return") a value calculated with an ''expression'', which is a formula consisting of ''constants'', ''variables'', ''operators'', and possibly ''statements''. | Like the Memento Calculation field type that game before it, the JavaScript field exists to produce ("return") a value calculated with an ''expression'', which is a formula consisting of ''constants'', ''variables'', ''operators'', and possibly ''statements''. | ||
==== Example scripts ==== | ==== Example simple expression scripts ==== | ||
:;123: the value ''a hundred and twenty-three'' | :;123: the value ''a hundred and twenty-three'' | ||
:;"Memento": the characters ''M e m e n t o'' as a string | :;"Memento": the characters ''M e m e n t o'' as a string |
Revision as of 02:33, 24 April 2021
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Native Memento Calculation scripting
Scripting for the Calculation field type is described in Calculation field.
Scripting Memento in JavaScript
Scripting in JavaScript is available in JavaScript field and Triggers.
The JavaScript field type
Like the Memento Calculation field type that game before it, the JavaScript field exists to produce ("return") a value calculated with an expression, which is a formula consisting of constants, variables, operators, and possibly statements.
Example simple expression scripts
- 123
- the value a hundred and twenty-three
- "Memento"
- the characters M e m e n t o as a string
- 2 * currentWeight
- If currentWeight is 23 lbs, then 46 lbs
- (hours * 60) + 10
- If hours is 5 and minutes is 10, then 310
Terminology
- Constant
- a value that has a string (text) value or a numeric (number) value.
- String
- "This is a string of textual characters"
- Number
- 123 or 3.14 or -28.5
- Symbol
- a name representing a constant value, like pi, x, tareWeight, or surname
- Variable
- a name representing a value that may change over time, like sum, currentValue, or orderDate
- Operator
- one or more characters that represent the value of other values that go together in some fashion to determine a result, like + for plus or - for minus or * for multiplied by or / for divided by.
- Some operators are made up of other operators used in combination, like <= for less than or equal to or && for and also.
JavaScript scripting for Memento Triggers
moment.min.js — a possibly useful wrapper for JavaScript dates & times
See http://momentjs.com and its subordinate pages Guides and Docs.
- Tidbit
- To get the current date, use moment().toDate(). To get the current date & time, use moment().toDate().getTime().