JS: splitting a long string into char-limited strings, avoiding word splitting

Question

I am trying to take a large block of text and split it into several lines, each of which contains 148 characters, avoiding word breaks.

I have it now that shares the words:

var length = shortData.new.length; if (length < 160){ outputString[0] = shortData.new; document.write(outputString[0]); } if (length > 160 && length < 308){ outputString[0] = shortData.new.substring(0,148); outputString[1] = shortData.new.substring(148,length); document.write(outputString[0]+"(txt4more..)"); document.write(outputString[1]); } if (length > 308 && length < 468){ outputString[0] = shortData.new.substring(0,148); outputString[1] = shortData.new.substring(148,308); outputString[2] = shortData.new.substring(308,length); document.write(outputString[0]+"(txt4more..)"); document.write(outputString[1]+"(txt4more..)"); document.write(outputString[2]); } if (length > 468 && length < 641){ outputString[0] = shortData.new.substring(0,148); outputString[1] = shortData.new.substring(148,308); outputString[2] = shortData.new.substring(308,468); outputString[3] = shortData.new.substring(468,length); document.write(outputString[0]+"(txt4more..)"); document.write(outputString[1]+"(txt4more..)"); document.write(outputString[2]+"(txt4more..)"); document.write(outputString[3]); } 

Answer 1

You can use this function, just go to your string and length, and it will return an array, for example:

 var outputString = splitter(shortData['new'], 148); 

Function:

 function splitter(str, l){ var strs = []; while(str.length > l){ var pos = str.substring(0, l).lastIndexOf(' '); pos = pos <= 0 ? l : pos; strs.push(str.substring(0, pos)); var i = str.indexOf(' ', pos)+1; if(i < pos || i > pos+l) i = pos; str = str.substring(i); } strs.push(str); return strs; } 

Usage example:

 splitter("This is a string with several characters.\ 120 to be precise I want to split it into substrings of length twenty or less.", 20); 

Outputs:

 ["This is a string","with several","characters. 120 to", "be precise I want","to split it into","substrings of", "length twenty or","less."] 

Answer 2

You will need to put some of your lines so that they have the number of characters required.

 var lines= s.match(/(.{1,147}\s)\s*/g); 

Answer 3

You can use lastIndexOf () on substr () of length 148 to find where to split the original string, delete this and the loop as long as the length is> 148, for example:

 var myText = "ad aenean adipiscing elit eget eleifend phasellus aenean lobortis vero venenatis ultricies eget iaculis ac neque nibh dignissim eleifend erat et in in justo sollicitudin mattis maecenas purus quis mi sed molestie integer magna non hendrerit nulla id neque augue suspendisse in in eget consectetuer et cubilia eu ullamcorper morbi elementum sed sed pharetra quam velit ante pellentesque eros nullam lobortis lorem fringilla libero elit nonummy purus sodales mauris sagittis praesent aenean in ut nullam ultricies quam aliquam arcu quisque semper lacinia lacinia sodales imperdiet ante venenatis suspendisse amet ante tellus nec nibh lorem in viverra magna cursus elit erat lobortis mattis purus pellentesque velit pellentesque dolor quam id mauris nibh pellentesque augue vel posuere aptent varius vivamus parturient hac ligula libero a varius sollicitudin sed dictumst morbi eros vestibulum donec purus turpis urna vel nisl quisque vulputate tristique non sed risus viverra varius tincidunt hendrerit ac dui mollis quam nunc suspendisse mattis volutpat vulputate integer ipsum cursus erat justo eu vestibulum sed blandit ac mi ligula montes sollicitudin vitae vel lacus imperdiet orci tincidunt sed imperdiet nunc vehicula pellentesque orci gravida diam non ut wisi sit et massa congue id scelerisque et mauris arcu nunc litora dignissim urna ea nullam magna felis duis pellentesque ultricies tincidunt vel pede fusce nunc sed interdum cursus wisi qui pulvinar wisi consectetuer fames sed hendrerit vitae velit viverra malesuada eu magna vehicula vivamus augue sagittis curabitur rutrum fringilla vivamus nisl enim eros elit vestibulum duis et duis erat sit auctor ac ipsum in et lacinia eu magna accumsan in nulla a sed massa maecenas ultricies duis dignissim sem augue id posuere lacus felis nisl quam ultricies urna dui curabitur morbi ante ut est eget tellus pulvinar mollis elementum tellus malesuada sollicitudin ligula fusce eget libero metus cras ligula felis nunc porttitor sit at"; var MAX_LENGTH = 148; while (myText.length > MAX_LENGTH) { var s = myText.substr(0, MAX_LENGTH); var i = s.lastIndexOf(" "); alert(myText.substr(0, i)); myText = myText.substr(i + 1, myText.length); } alert(myText); 

Answer 4

Without thinking about it, I would do something like this, just not in pseudo code

 if string length > 148 for i=148;i<string length;i+148 if character at i = space add substring(i-148 to i) to output[] else add substring(i-148 to lastindoxof space) to output[] set i to lastindoxof space + 1) if i-148 != string length add substring (i-148 to string length -1) to output[]