Modify Strand Assignment: Difference between revisions
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For example, <apl size="large">(A B C){rho}{is}{enclose}{iota}3</apl> is shorthand for <apl size="large">A{is}A{rho}{iota}3 {diamond} B{is}B{rho}{iota}3 {diamond} C{is}C{rho}{iota}3</apl>. In contrast, <apl size="large">(A B C){rho}{is}{iota}3</apl> is shorthand for <apl size="large">A{is}A{rho}1 {diamond} B{is}B{rho}2 {diamond} C{is}C{rho}3 | For example, <apl size="large">(A B C){rho}{is}{enclose}{iota}3</apl> is shorthand for <apl size="large">A{is}A{rho}{iota}3 {diamond} B{is}B{rho}{iota}3 {diamond} C{is}C{rho}{iota}3</apl>. In contrast, <apl size="large">(A B C){rho}{is}{iota}3</apl> is shorthand for <apl size="large">A{is}A{rho}1 {diamond} B{is}B{rho}2 {diamond} C{is}C{rho}3</apl>. | ||
Revision as of 09:22, 9 April 2008
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| A1 A2 ... An are all names with existing values, R is a scalar or vector. | ||||
| If 1<⍴⍴R, signal a RANK ERROR. | ||||
| If R is a scalar or one element vector, its item, in combination with the value of each name, is assigned to each name, as in Ai←Aifn ⊃⍬⍴R. | ||||
| Otherwise, assume there are n names in the list: | ||||
| If n≠⍴R, signal a LENGTH ERROR. | ||||
| Otherwise, each successive item of R, in combination with the value of each successive name, is assigned to each successive name, as in Ai←Aifn i⊃R. |
For example, (A B C)⍴←⊂⍳3 is shorthand for A←A⍴⍳3 ⋄ B←B⍴⍳3 ⋄ C←C⍴⍳3. In contrast, (A B C)⍴←⍳3 is shorthand for A←A⍴1 ⋄ B←B⍴2 ⋄ C←C⍴3.
