Nmingott: highlithg

2025-05-12T19:55:37Z

highlithg

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	'''Problem'''. You need to split a string into different parts. For example you may split a long text into lines or split the fields of a CSV line into records. You are probably looking around for something called '''split'''; it will not work, read on.		'''Problem'''. You need to split a string into different parts. For example you may split a long text into lines or split the fields of a CSV line into records. You are probably looking around for something called '''split'''; it will not work, read on.

	'''Solution'''. The easiest fix is to use send aString a '''findTokens:''' message. It is just an unusual name for something most of programming languages call ''split''. The following example shows how to use '''findTokens:''' and its cousin '''findTokens:keep:'''.		'''Solution'''. The easiest fix is to use send aString a '''findTokens:''' message. It is just an unusual name for something most of programming languages call ''split''. The following example shows how to use '''findTokens:''' and its cousin '''findTokens:keep:'''.<syntaxhighlight lang="smalltalk">
	~~<code>~~'hello world' findTokens: ' '. " an OrderedCollection('hello' 'world') "		'hello world' findTokens: ' '. " an OrderedCollection('hello' 'world') "

⚫	'~~hello world~~' findTokens: ' '. " an OrderedCollection('~~hello~~' '~~world~~') "
	'~~foo,bar,baz~~' findTokens: ','. " an OrderedCollection('~~foo~~' '~~bar' 'baz~~') "		'hello world' findTokens: ' '. " an OrderedCollection('hello' 'world') "


	'foo,bar,baz' findTokens~~: ',' keep~~: ','. " an OrderedCollection('foo~~' ',~~' 'bar~~' ',~~' 'baz') "		'foo,bar,baz' findTokens: ','. " an OrderedCollection('foo' 'bar' 'baz') "

⚫	'foo,bar,,baz' findTokens: ',' keep: ','. " an OrderedCollection('foo' ',' 'bar' ',' ',' 'baz') "~~</code>~~
		⚫	'foo,bar,baz' findTokens: ',' keep: ','. " an OrderedCollection('foo' ',' 'bar' ',' 'baz') "
⚫	'''note'''. For months I have been using ''Cuis'' without knowing this fundamental method. I was using ''Regex'' to fill the gap, but it is like shooting a mosquito with a cannon. This stressed two points: 1) If you choose unusual names for your code poeple will not find/get you 2) ''Squeak'' ''Method Finder'' could be useful also in ''Cuis''.

		⚫	'foo,bar,,baz' findTokens: ',' keep: ','. " an OrderedCollection('foo' ',' 'bar' ',' ',' 'baz') "
		⚫	</syntaxhighlight>'''note'''. For months I have been using ''Cuis'' without knowing this fundamental method. I was using ''Regex'' to fill the gap, but it is like shooting a mosquito with a cannon. This stressed two points: 1) If you choose unusual names for your code poeple will not find/get you 2) ''Squeak'' ''Method Finder'' could be useful also in ''Cuis''.
	----Dr. Nicola Mingotti wrote this page in 03-Dec-2021. Tested in Cuis5.0-4963.image.		----Dr. Nicola Mingotti wrote this page in 03-Dec-2021. Tested in Cuis5.0-4963.image.

Nmingott: importe material

2025-05-04T20:04:37Z

importe material

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'''Problem'''. You need to split a string into different parts. For example you may split a long text into lines or split the fields of a CSV line into records. You are probably looking around for something called '''split'''; it will not work, read on.

'''Solution'''. The easiest fix is to use send aString a '''findTokens:''' message. It is just an unusual name for something most of programming languages call ''split''. The following example shows how to use '''findTokens:''' and its cousin '''findTokens:keep:'''.
<code>'hello world' findTokens: ' '. " an OrderedCollection('hello' 'world') "
'hello world' findTokens: ' '. " an OrderedCollection('hello' 'world') "
'foo,bar,baz' findTokens: ','. " an OrderedCollection('foo' 'bar' 'baz') "

'foo,bar,baz' findTokens: ',' keep: ','. " an OrderedCollection('foo' ',' 'bar' ',' 'baz') "
'foo,bar,,baz' findTokens: ',' keep: ','. " an OrderedCollection('foo' ',' 'bar' ',' ',' 'baz') "</code>
'''note'''. For months I have been using ''Cuis'' without knowing this fundamental method. I was using ''Regex'' to fill the gap, but it is like shooting a mosquito with a cannon. This stressed two points: 1) If you choose unusual names for your code poeple will not find/get you 2) ''Squeak'' ''Method Finder'' could be useful also in ''Cuis''.
----Dr. Nicola Mingotti wrote this page in 03-Dec-2021. Tested in Cuis5.0-4963.image.

String splitting - Revision history

Nmingott: highlithg

Nmingott: importe material