Question

Hi I want to search about some characters (or word) in text using JavaScript and remove the line that starts this characters/word..

example

remove the lines that start with ( He ) ..

input

Hello world, 
He like cats and dogs
Bye bye

output

Hello world, 
Bye bye

Answer 1

You can find the pos of the “He ” using the indexOf method and then get the position of the next line-break to remove that line using the substring method.

var someString = "Hello world,\n" +
    "He like cats and dogs\n" +
    "Bye bye";

var pos = someString.indexOf('He ');
var nextLineBreak = someString.indexOf('\n', pos);

var firstPart = someString.substring(0, pos);
var secondPart = someString.substring(nextLineBreak +1);

var finalString = firstPart + secondPart;
alert(finalString);

jsFiddle here : http://jsfiddle.net/zw2Gh/