Commatizing numbers: Difference between revisions

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''Commatizing''   numbers (as used here, a handy expedient made-up word) is the act of adding commas to a number (or string), or the numeric part of a larger string.
''Commatizing''   numbers (as used here, a handy expedient made-up word) is the act of adding commas to a number (or string), or the numeric part of a larger string.


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;Task:


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;Task:
Write a function that takes a string as an argument with optional arguments or parameters (the format of parameters/options is left to the programmer) that in general, adds commas (or some
Write a function that takes a string as an argument with optional arguments or parameters (the format of parameters/options is left to the programmer) that in general, adds commas (or some
other characters, including blanks or tabs) to the first numeric part of a string (if it's suitable for commatizing as per the rules below), and returns that newly commatized string.
other characters, including blanks or tabs) to the first numeric part of a string (if it's suitable for commatizing as per the rules below), and returns that newly commatized string.
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::::*   ±25000 motes.
::::*   ±25000 motes.


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<br>
The string may possibly ''not'' have a number suitable for commatizing, so it should be untouched and ''no error generated''.
The string may possibly ''not'' have a number suitable for commatizing, so it should be untouched and ''no error generated''.


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::* &nbsp; the case (upper/lower) of the exponent indicator, e.g.: &nbsp; 4.8903d-002
::* &nbsp; the case (upper/lower) of the exponent indicator, e.g.: &nbsp; 4.8903d-002


<br>
Any exponent character(s) should be supported:
Any exponent character(s) should be supported:
::::::* &nbsp; 1247e12
::::::* &nbsp; 1247e12
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::::::* &nbsp; 10000pow(pi)
::::::* &nbsp; 10000pow(pi)


Numbers may be terminated with any non-digit character, including subscripts and/or superscript: &nbsp; 4142135624² &nbsp; or &nbsp; 7320509076<sub>(base 24)</sub>.
<br>Numbers may be terminated with any non-digit character, including subscripts and/or superscript: &nbsp; 4142135624² &nbsp; or &nbsp; 7320509076<sub>(base 24)</sub>.


The character(s) to be used for the comma can be specified, and may contain blanks, tabs, and other whitespace characters, as well as multiple characters. &nbsp; The default is the comma (<big>''','''</big>) character.
The character(s) to be used for the comma can be specified, and may contain blanks, tabs, and other whitespace characters, as well as multiple characters. &nbsp; The default is the comma (<big>''','''</big>) character.
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The character strings below may be placed in a file (and read) or stored as simple strings within the program.
The character strings below may be placed in a file (and read) or stored as simple strings within the program.
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<br><br>

;Strings to be used as a minimum:
;Strings to be used as a minimum:
The value of &nbsp; pi &nbsp; should be separated with blanks every 5 places past the decimal point,
The value of &nbsp; pi &nbsp; should be separated with blanks every 5 places past the decimal point,
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:* &nbsp; 6/9/1946 was a good year for some.
:* &nbsp; 6/9/1946 was a good year for some.
<br>where the penultimate string has three leading blanks &nbsp; (real blanks are to be used).
<br>where the penultimate string has three leading blanks &nbsp; (real blanks are to be used).



;Also see:
;Also see:
Retrieved from "https://rosettacode.org/wiki/Commatizing_numbers"