JavaScript? ??? ?? ??? ??? ?? CSV ???? ????? ?? ??? ? ????
Dec 08, 2024 am 11:46 AMJavaScript? ???? ??? CSV ??? ?? ??
JavaScript?? CSV(??? ??? ?) ???? ??? ? ?? ??? ?? ???? ??? ?? ?? ??? ??? ? ??? ??? ? ????. ??? ????? ? ????? ????? ??? ? ?? ??? ??? ????.
CSV ??? ??? ?? ? ?? ??? ?? ???
?? ???? ??? CSV ????? ????? , ?? ???? ?????.
re_valid = r""" # Validate a CSV string having single, double or un-quoted values. ^ # Anchor to start of string. \s* # Allow whitespace before value. (?: # Group for value alternatives. '[^'\]*(?:\[\S\s][^'\]*)*' # Either Single quoted string, | "[^"\]*(?:\[\S\s][^"\]*)*" # or Double quoted string, | [^,'"\s\]*(?:\s+[^,'"\s\]+)* # or Non-comma, non-quote stuff. ) # End group of value alternatives. \s* # Allow whitespace after value. (?: # Zero or more additional values , # Values separated by a comma. \s* # Allow whitespace before value. (?: # Group for value alternatives. '[^'\]*(?:\[\S\s][^'\]*)*' # Either Single quoted string, | "[^"\]*(?:\[\S\s][^"\]*)*" # or Double quoted string, | [^,'"\s\]*(?:\s+[^,'"\s\]+)* # or Non-comma, non-quote stuff. ) # End group of value alternatives. \s* # Allow whitespace after value. )* # Zero or more additional values $ # Anchor to end of string. """
??? CSV ????? ?? ?? ?? ???? ?? ?? ???? ?????:
re_value = r""" # Match one value in valid CSV string. (?!\s*$) # Don't match empty last value. \s* # Strip whitespace before value. (?: # Group for value alternatives. '([^'\]*(?:\[\S\s][^'\]*)*)' # Either : Single quoted string, | "([^"\]*(?:\[\S\s][^"\]*)*)" # or : Double quoted string, | ([^,'"\s\]*(?:\s+[^,'"\s\]+)*) # or : Non-comma, non-quote stuff. ) # End group of value alternatives. \s* # Strip whitespace after value. (?:,|$) # Field ends on comma or EOS. """
CSV ?? ?? ??
??? ???? ???? CSV ???? ?? ???? ??? ??? ? ????.
function CSVtoArray(text) { // Return NULL if input string is not well formed CSV string. if (!re_valid.test(text)) return null; var a = []; // Initialize array to receive values. text.replace(re_value, // "Walk" the string using replace with callback. function(m0, m1, m2, m3) { // Remove backslash from \' in single quoted values. if (m1 !== undefined) a.push(m1.replace(/\'/g, "'")); // Remove backslash from \" in double quoted values. else if (m2 !== undefined) a.push(m2.replace(/\"/g, '"')); else if (m3 !== undefined) a.push(m3); return ''; // Return empty string. }); // Handle special case of empty last value. if (/,\s*$/.test(text)) a.push(''); return a; }
? ???
??? ?? CSV ??? ? ?? ?? ??? ??? ? ?? ????.
// Test string from original question let result = CSVtoArray("'string, duppi, du', 23, lala"); console.log(result); // ['string, duppi, du', '23', 'lala'] // Empty CSV string let result = CSVtoArray(""); console.log(result); // [] // CSV string with two empty values let result = CSVtoArray(","); console.log(result); // ['', ''] // Double quoted CSV string having single quoted values let result = CSVtoArray("'one','two with escaped \' single quote', 'three, with, commas'"); console.log(result); // ['one', 'two with escaped \' single quote', 'three, with, commas'] // Single quoted CSV string having double quoted values let result = CSVtoArray('"one","two with escaped \" double quote", "three, with, commas"'); console.log(result); // ['one', 'two with escaped " double quote', 'three, with, commas'] // CSV string with whitespace in and around empty and non-empty values let result = CSVtoArray(" one , 'two' , , ' four' ,, 'six ', ' seven ' , "); console.log(result); // ['one', 'two', '', 'four', '', 'six ', ' seven '] // Not valid let result = CSVtoArray("one, that's me!, escaped \, comma"); console.log(result); // null
? ???? CSV ???? ??? ?? ??? ???? ??? ??? ?? ??? ?????. ??? ?? ??? ??
? ??? JavaScript? ??? ?? ??? ??? ?? CSV ???? ????? ?? ??? ? ????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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