How to Program/en - Versionsgeschichte

Cg: /* Find Functions by Example */

2025-05-20T12:19:17Z

Find Functions by Example

← Nächstältere Version		Version vom 20. Mai 2025, 12:19 Uhr
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	[[Expecco_API/en#Smalltalk_Language_Syntax_.28BNF.29 \| "Smalltalk Language Syntax"]] for the syntax.		[[Expecco_API/en#Smalltalk_Language_Syntax_.28BNF.29 \| "Smalltalk Language Syntax"]] for the syntax.

	== Find Functions by Example ==		== MethodFinder: Find Functions by Example ==

	[[Bild:Method Finder1.png\|thumb\|250px\|Method Finder searching bitwise AND operations]]		[[Bild:Method Finder1.png\|thumb\|250px\|Method Finder searching bitwise AND operations]]

Cg: /* Find Functions by Example */

2025-05-10T19:21:17Z

Find Functions by Example

← Nächstältere Version		Version vom 10. Mai 2025, 19:21 Uhr
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	In other words, it answers the question:<br>"''given an input A, which operation will give me X as output?''",<br>or "''given inputs A,B,C, which operation will give me X?''".		In other words, it answers the question:<br>"''given an input A, which operation will give me X as output?''",<br>or "''given inputs A,B,C, which operation will give me X?''".

	The method finder is opened via the "''Extras''" &~~#8594~~; "''Tools''" &~~#8594~~; "''Method Finder''" menu item.		The method finder is opened via the "''Extras''" → "''Tools''" → "''Method Finder''" menu item.

	A similar tool called "[[Action Finder/en\|''Action Finder'']]" is provided to find action blocks in the [[CompoundBlock Editor/en \| Diagram Editor]].		A similar tool called "[[Action Finder/en\|''Action Finder'']]" is provided to find action blocks in the [[CompoundBlock Editor/en \| Diagram Editor]].

Cg: /* Find Functions by Example */

2025-05-10T19:19:49Z

Find Functions by Example

← Nächstältere Version		Version vom 10. Mai 2025, 19:19 Uhr
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	== Find Functions by Example ==		== Find Functions by Example ==

	[[Bild:Method Finder1.png\|thumb\|250px\|Method Finder searching ~~bit~~ operations]]		[[Bild:Method Finder1.png\|thumb\|250px\|Method Finder searching bitwise AND operations]]

	Expecco includes a very powerful tool called "''Method Finder''", to help finding operations by expected result.		Expecco includes a very powerful tool called "''Method Finder''", to help finding operations by expected result.

Cg: /* Example5 */

2025-04-16T09:15:43Z

Example5

← Nächstältere Version		Version vom 16. April 2025, 09:15 Uhr
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	==== Example5 ====		==== Example5 ====
	You need code to check if a file exists.		You need code to check if a file exists.
	<br>Enter the name of an existing file (eq. <code>'c:\temp'</code> on Windows or <code>'/tmp'</code> on Unix/Linux), in any case with quotes as receiver and <code>true</code> as answer.		<br>Enter the name of an existing file (eg. <code>'c:\temp'</code> on Windows or <code>'/tmp'</code> on Unix/Linux), in any case with quotes as receiver and <code>true</code> as answer.
	Press search. There will be a number of matches, but none seems to be related to filenames. Obviously the searched functionality is not in the String class, but somewhere else (hint: there is a special Filename class in the system).		Press search. There will be a number of matches, but none seems to be related to filenames. Obviously the searched functionality is not in the String class, but somewhere else (hint: there is a special Filename class in the system).
	But the MethodFinder is able to care for this: turn on the "''Insert Conversions''" checkbox and seach again.		But the MethodFinder is able to care for this: turn on the "''Insert Conversions''" checkbox and seach again.

Cg: /* Example4 */

2025-04-16T09:15:25Z

Example4

← Nächstältere Version		Version vom 16. April 2025, 09:15 Uhr
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	1) The Method Finder tries a number of common operations; it does not try every existing method in the system. Thus, it may not find a suitable method, even if one exists.		1) The Method Finder tries a number of common operations; it does not try every existing method in the system. Thus, it may not find a suitable method, even if one exists.

			==== Example5 ====
			You need code to check if a file exists.
			<br>Enter the name of an existing file (eq. <code>'c:\temp'</code> on Windows or <code>'/tmp'</code> on Unix/Linux), in any case with quotes as receiver and <code>true</code> as answer.
			Press search. There will be a number of matches, but none seems to be related to filenames. Obviously the searched functionality is not in the String class, but somewhere else (hint: there is a special Filename class in the system).
			But the MethodFinder is able to care for this: turn on the "''Insert Conversions''" checkbox and seach again.
			Notice that the result list now includes conversions "asFilename" applied to the receiver.

	== Executing Code Fragments ==		== Executing Code Fragments ==

Cg: /* Find Functions by Example */

2025-04-16T08:41:57Z

Find Functions by Example

← Nächstältere Version		Version vom 16. April 2025, 08:41 Uhr
Zeile 23:		Zeile 23:

	In other words, it answers the question:<br>"''given an input A, which operation will give me X as output?''",<br>or "''given inputs A,B,C, which operation will give me X?''".		In other words, it answers the question:<br>"''given an input A, which operation will give me X as output?''",<br>or "''given inputs A,B,C, which operation will give me X?''".

		⚫	The method finder is opened via the "''Extras''" → "''Tools''" → "''Method Finder''" menu item.

		⚫	A similar tool called "[[Action Finder/en\|''Action Finder'']]" is provided to find action blocks in the [[CompoundBlock Editor/en \| Diagram Editor]].

	==== Example1 ====		==== Example1 ====
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	<br>Change the number of arguments again, now to 2 and enter <code>6</code> as argument2.		<br>Change the number of arguments again, now to 2 and enter <code>6</code> as argument2.
	<br>Again, no result, but notice that the information message tells you that you may want to try argument permutations. This will try the search with all permutations. Enable this checkbox to find an answer.		<br>Again, no result, but notice that the information message tells you that you may want to try argument permutations. This will try the search with all permutations. Enable this checkbox to find an answer.

⚫	The method finder is opened via the "''Extras''" → "''Tools''" → "''Method Finder''" menu item.

⚫	A similar tool called "[[Action Finder/en\|''Action Finder'']]" is provided to find action blocks in the [[CompoundBlock Editor/en \| Diagram Editor]].

	1) The Method Finder tries a number of common operations; it does not try every existing method in the system. Thus, it may not find a suitable method, even if one exists.		1) The Method Finder tries a number of common operations; it does not try every existing method in the system. Thus, it may not find a suitable method, even if one exists.

Cg: /* Example4 */

2025-04-16T08:41:02Z

Example4

← Nächstältere Version		Version vom 16. April 2025, 08:41 Uhr
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	<br>Again, no result.		<br>Again, no result.
	<br>Change the number of arguments again, now to 2 and enter <code>6</code> as argument2.		<br>Change the number of arguments again, now to 2 and enter <code>6</code> as argument2.
	<br>Again, no result, but ~~this~~ ~~time,~~ the information message tells you that you may want to try argument permutations. This will try the search with all permutations. Enable this checkbox to find an answer.		<br>Again, no result, but notice that the information message tells you that you may want to try argument permutations. This will try the search with all permutations. Enable this checkbox to find an answer.

	The method finder is opened via the "''Extras''" → "''Tools''" → "''Method Finder''" menu item.		The method finder is opened via the "''Extras''" → "''Tools''" → "''Method Finder''" menu item.

Cg: /* Example4 */

2025-04-16T08:40:06Z

Example4

← Nächstältere Version		Version vom 16. April 2025, 08:40 Uhr
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	<br>So lets change the number of arguments to 1 and enter <code>$.</code> (the period as Smalltalk constant) as argument1.		<br>So lets change the number of arguments to 1 and enter <code>$.</code> (the period as Smalltalk constant) as argument1.
	<br>Again, no result.		<br>Again, no result.
	<br>Change the number of arguments again, now to 2 and enter 6 as argument2.		<br>Change the number of arguments again, now to 2 and enter <code>6</code> as argument2.
	<br>Again, no result, but this time, the information message tells you that you may want to try argument permutations. This will try the search with all permutations. Enable this checkbox to find an answer.		<br>Again, no result, but this time, the information message tells you that you may want to try argument permutations. This will try the search with all permutations. Enable this checkbox to find an answer.

Cg: /* Example4 */

2025-04-16T08:39:41Z

Example4

← Nächstältere Version		Version vom 16. April 2025, 08:39 Uhr
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	<br>Thus, enter <code>0</code> as number of arguments, <code>'abc'</code> (with quotes) as input1, and <code>'abc...'</code> as expected result.		<br>Thus, enter <code>0</code> as number of arguments, <code>'abc'</code> (with quotes) as input1, and <code>'abc...'</code> as expected result.
	<br>Press "''Search''" and the MethodFinder will NOT be able to find a result. Obviously, there is no zero-argument function which pads a given string with periods to a length of 6.		<br>Press "''Search''" and the MethodFinder will NOT be able to find a result. Obviously, there is no zero-argument function which pads a given string with periods to a length of 6.
	<br>So lets change the number of arguments to 1 and enter <code>$.</code> (the period) as argument1.		<br>So lets change the number of arguments to 1 and enter <code>$.</code> (the period as Smalltalk constant) as argument1.
	<br>Again, no result.		<br>Again, no result.
	<br>Change the number of arguments again, now to 2 and enter 6 as argument2.		<br>Change the number of arguments again, now to 2 and enter 6 as argument2.

Cg: /* Example4 */

2025-04-16T08:39:05Z

Example4

← Nächstältere Version		Version vom 16. April 2025, 08:39 Uhr
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	You want to pad a string up to a given length with period characters ($. in Smalltalk), useful to generate a list with aligned columns.<br>Although you might already assume that the pad character and the length are needed as arguments, let us start with the unrealistic assumption that a function exists which does not need that information (for demonstration).		You want to pad a string up to a given length with period characters ($. in Smalltalk), useful to generate a list with aligned columns.<br>Although you might already assume that the pad character and the length are needed as arguments, let us start with the unrealistic assumption that a function exists which does not need that information (for demonstration).
	<br>Thus, enter <code>0</code> as number of arguments, <code>'abc'</code> (with quotes) as input1, and <code>'abc...'</code> as expected result.		<br>Thus, enter <code>0</code> as number of arguments, <code>'abc'</code> (with quotes) as input1, and <code>'abc...'</code> as expected result.
	<br>Press "''Search''" and the MethodFinder will NOT be able to find a result. Obviously, there is no function which pads a given string with periods to a length of 6.		<br>Press "''Search''" and the MethodFinder will NOT be able to find a result. Obviously, there is no zero-argument function which pads a given string with periods to a length of 6.
	<br>So lets change the number of arguments to 1 and enter $. (the period) as argument1.		<br>So lets change the number of arguments to 1 and enter <code>$.</code> (the period) as argument1.
	<br>Again, no result.		<br>Again, no result.
	<br>Change the number of arguments again, now to 2 and enter 6 as argument2.		<br>Change the number of arguments again, now to 2 and enter 6 as argument2.