Symbol Execute - Revision history

Robert Wallick: /* Examples */ modified last example

2015-04-23T21:17:53Z

Examples: modified last example

← Older revision		Revision as of 17:17, 23 April 2015
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	⍴A ⍝Execute has created a zero-length string variable A in the current workspace.		⍴A ⍝Execute has created a zero-length string variable A in the current workspace.
	0		0
	⍝Another Execute example, in this case taking a string and executing it through APL's interpreter to ~~create a 2-element integer vector~~.		⍝Another Execute example, in this case taking a string and executing it through APL's interpreter to arithmetically multiply two variables together.
	A←99		A←99
	B←100		B←100
	⍎'~~A B~~'		⍎'A×B'
	~~99 100~~		9900
	</apll>		</apll>
	In short, the Execute(⍎) function is '''very powerful''' in APL/APL2 when correctly used and has a <u>broad range of uses</u>, particularly '''inside user defined functions''' - to create/convert information from string representations. First try using Execute '''without''' the dieresis operator, then if you are unable to achieve the desired results, try including the dieresis operator or change usage/calling syntax, e.g. with/without the ravel(,) operator.		In short, the Execute(⍎) function is '''very powerful''' in APL/APL2 when correctly used and has a <u>broad range of uses</u>, particularly '''inside user defined functions''' - to create/convert information from string representations. First try using Execute '''without''' the dieresis operator, then if you are unable to achieve the desired results, try including the dieresis operator or change usage/calling syntax, e.g. with/without the ravel(,) operator.

Robert Wallick: /* Examples */ more examples added

2015-04-23T20:48:37Z

Examples: more examples added

@@ Line 46: / Line 46: @@
 9 1 0 0
 </code>
 In short, the Execute(⍎) function is '''very powerful''' in APL/APL2 when correctly used and has a <u>broad range of uses</u>, particularly '''inside user defined functions''' - to create/convert information from string representations.  First try using Execute '''without''' the dieresis operator, then if you are unable to achieve the desired results, try including the dieresis operator or change usage/calling syntax, e.g. with/without the ravel(,) operator.

Robert Wallick: /* Examples */ wording, expanded

2015-04-12T18:08:35Z

Examples: wording, expanded

← Older revision		Revision as of 14:08, 12 April 2015
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	==Usage==		==Usage==
	==Examples==		==Examples==
	Valid uses of Execute(⍎) operator in conjunction with the Each(¨ or dieresis) operator:		Valid uses of Execute(⍎) operator in conjunction '''with and without''' the Each(¨ or dieresis) operator:<br>
			(The examples just below are generally listed in order of complexity, least complex = topmost, most complex = bottommost.)
	<code>		<code>
	⍎¨'99' '100'		⍎¨'99' '100' ⍝Dieresis used and IS needed
	99 100		99 100
	A←'99'		A←'99'
Line 17:		Line 18:
	⍎¨A,B		⍎¨A,B
	9 9 1 0 0		9 9 1 0 0
			⍎'99' '100' ⍝Dieresis NOT used in nearly the same as topmost case - ⍎¨'99' '100' - and generates a Domain Error
			DOMAIN ERROR
			⍎'99 100' ⍝Dieresis NOT used and was not needed
			99 100
			C←99.8
			D←100.2
			⍎'C D' ⍝Dieresis NOT used and was not needed
			99.8 100.2
			⍎'E←45000.78 ⋄ F←88765.321' ⍝The diamond operator(⋄) is used to separate APL lines of code and IS supported in NARS
			E
			45000.78
			F
			88765.321
	</code>		</code>

	~~The '''~~Execute operator''' ~~was primarily first~~ designed to convert character representations of numbers into actual digital numbers with a floating point or integer computer storage format. It was specifically designed to generate an error message when a non-digit such as a letter(e.g. 'A' or 'B' was attempted to be converted to digital or computer binary format. In short, if you look at the code		Note that the Execute operator was primarily-'''originally designed to convert character representations of numbers into actual digital numbers''' with a floating point or integer computer storage format. It was specifically designed to generate an error message when a non-digit such as a letter(e.g. 'A' or 'B' or even 'C' or 'D' was attempted to be converted to digital or computer binary format. In short, if you look at the code just above, you will see that yes Execute will convert char digits into numbers with or without the Each(dieresis) Operator.
	just above, you will see that yes Execute will convert char digits into numbers with the Each Operator.

	The key ~~to correctly using Execute~~ is using the correct syntax to achieve your desired results, ~~perhaps~~ either		The key is using the correct syntax to achieve your desired results, either:
	# Separating ~~each~~ argument into '1' '2' '3' '4' vectorized char arguments or		# Separating every defined argument into '1' '2' '3' '4' vectorized char arguments or
	# First placing char data digits into vars(A and B) and then executing each without any quote chars.		# First placing char data digits into vars(A and B) and then executing each without any quote chars.

			Also, note how the Execute function's use has been expanded over time to carefully under valid (Workspace variable name(s) known/recognized) circumstances yes execute or convert <u>non-digit chars, e.g. variables C and D</u> in quotes '''above'''. Note how execution/conversion of variables C and D into, in this case, a floating point numeric vector did '''NOT require the Each operator'''. Further vars '''C and D are considered floating point''' or real number vars while '''A and B are string vars''' which convert to '''integer numbers'''. The inclusion or omission of the ravel(,) operator also can make a big difference, e.g.:
			<code>
			⍎¨A B ⍝Two-element(2 numbers) vector result
			99 100
			⍎¨A,B ⍝Five-element(5 single-digit numbers) vector result
			9 9 1 0 0
			</code>
			In short, the Execute(⍎) function is '''very powerful''' in APL/APL2 when correctly used and has a <u>broad range of uses</u>, particularly '''inside user defined functions''' - to create/convert information from string representations. First try using Execute '''without''' the dieresis operator, then if you are unable to achieve the desired results, try including the dieresis operator or change usage/calling syntax, e.g. with/without the ravel(,) operator.

	==See Also==		==See Also==

Robert Wallick: /* See Also */ see also dieresis op

2015-04-12T09:01:24Z

Robert Wallick: /* Example */ examples added

2015-04-12T08:54:00Z

Example: examples added

@@ Line 2: / Line 2: @@
 <h1> {execute} &mdash; Execute a string &mdash; Keystroke ?ALT+X &mdash; Character 0000</h1>
 ==Usage==
-==Example==
+==Examples==
 ==See Also==

Paul Robinson at 04:13, 4 March 2013

2013-03-04T04:13:46Z

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Paul Robinson at 04:13, 4 March 2013

2013-03-04T04:13:06Z

← Older revision		Revision as of 00:13, 4 March 2013
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	__NOTOC__		__NOTOC__
	<h1> {execute} — ~~(Replace this with Meaning of symbol)~~ — Keystroke ?ALT+X — Character 0000</h1>		<h1> {execute} — Execute a string — Keystroke ?ALT+X — Character 0000</h1>
	==Usage==		==Usage==
	==Example==		==Example==
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Paul Robinson: new

2013-03-01T14:48:50Z

new

New page

__NOTOC__
<h1> {execute} — (Replace this with Meaning of symbol) — Keystroke ?ALT+X — Character 0000</h1>
==Usage==
==Example==
==See Also==

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← Older revision		Revision as of 05:01, 12 April 2015
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	==See Also==		==See Also==
			[[Symbol_Dieresis\|Dieresis or Each]] Operator.


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	[[Category:Mouse Group 10\|E]]		[[Category:Mouse Group 10\|E]]
	[[Category:Symbols\|E]]		[[Category:Symbols\|E]]