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THE HYPERCARD CENTER |
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Note: This is a work in progress and many formatting issues have been fixed. Read more about the project on the home page.
addadd number to [chunk of] container
Note: The container or chunk referred to must contain a number. The add command adds the value of number to the number in a container or chunk and replaces the contents of the container or chunk with the result. (You can use the is a operator to see if the container is a number.) Examplesadd 3 to It add field "Amount" to field "Total" get last line of card field "credits" if it is a number then add it to item 1 of theTotal if the Message box is a number then add 15 to Message box
Related Topics Placeholders
numberAn expression that evaluates to a number. For example: 169 / 19 pi (60.625 * 500) average(1,4,5,10) i+1 -- (where i is a number) line 1 of fld "Debits"
Note: Formally, HyperCard distinguishes between factors (simple values) and expressions. The difference between factors and expression matters only if you like to drop parentheses. Most functions take factors as their parameters, which is why abs of -10 + 2 returns 12 and abs of (-10 + 2) returns 8. In short, always use parentheses to group things the way you want them to evaluate, and you won’t have to worry about the difference between factors and expressions. chunkOne of the following forms (or combinations thereof): ordinal character character posInteger [to posInteger] ordinal word word posInteger [to posInteger] ordinal item item posInteger [to posInteger] ordinal line line posInteger [to posInteger]
For example: first character second item middle line character 1 char 1 to 10 word 3 item 5 to (the number of items of me) line 1 to 10 char 1 to 10 of word 2 to 4 of ¬ line 3 to 6
A chunk combined with of and a container is called a chunk expression. For example: line 1 of card field "index" Important: You can’t combine a stack name with a chunk expression—you can only refer to a chunk in the current stack. containerHyperTalk Definition A place where you can store and retrieve a value. There are six types of containers in HyperCard: a variable, a button, a field, the selection, the Message box, and menus. myVariable [the] selection the Message box btn 3 bg btn "Names" card field 1 bkgnd field "Total" menu 2 menu "Edit"
Additionally, you can refer to a button or field by its part number: card part 1 last background part
AppleScript Definition An object that contains one or more other objects, known as elements of the container. In a reference, the container specifies where to find an object. You specify containers with the reserved words of or in. You can also use the possesive form ('s) to specify containers. For example, in first window's name
the container is first window. The object it contains is a name property.
HyperTalk Reference
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