Question

45

javascript if condition check string with newline symbol i.e n

rated 0 times [ 47] [ 2] / answers: 1 / hits: 26560 / 11 Years ago, thu, october 31, 2013, 12:00:00

In my script I have a string with newline characters. Using newline (n)character I parsed it to array.

I struggling to compare in my if condition (parsedarray[0]=='newline character'). Please help me to compare the newline character in my if condition. I also tried to alert the parsedarray[0]. It alerts blank alert box.` I am unable to check the newline character in if statement. For instance, I have a single String with multiple newline , tabs consisting of 40 lines. In my script user enter a line number, string for that line number, after receiving both information, I want to replace the newline with entered string in the line number. Here line number is an index. So that again I will construct a single string by joining the parsed string. Also my array size should not grow. or Reduce.??? And importantly I want to validate the given String with the available string, if both matches (other than newline) need to put alert message.

 var strarray=doc.getElementbyid('mytextarea').value;

 var parsedarray=[];

 parsedarray=strarray.split('\n');`

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cameron

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answered 11 Years ago harveys · Accepted Answer

Instead of split use indexOf to find position of the first occurrence of a specified value in a string.

Eg:

var text=Hello worldn;

if(text.indexOf(n)==-1){

  alert(No newline characters)

}else{

  alert(Contains newline characters)

}