React Native

StringBuilder GetBefore

Demonstrates the StringBuilder.GetBefore method.

The GetBefore method was added in Chilkat v9.5.0.77

React Native

import { StringBuilder } from '@chilkat/react-native'

function chilkatExample() {
  const sb = new StringBuilder();
  sb.append('www.chilkatsoft.com');

  // The GetBefore method returns the contents of the string up to but not including
  // the marker string.  If the remove flag is true, then both the returned string AND
  // the marker are removed.
  let removeFlag = false;
  let marker = '.';
  let substr = sb.getBefore(marker, removeFlag);
  console.log(`substr = ${substr}`);
  console.log(`sb contains: ${sb.getAsString()}`);

  // Output:
  // substr = www
  // sb contains: www.chilkatsoft.com

  removeFlag = true;
  substr = sb.getBefore(marker, removeFlag);
  console.log(`substr = ${substr}`);
  console.log(`sb contains: ${sb.getAsString()}`);

  // Output:
  // substr = www
  // sb contains: chilkatsoft.com

  // If the marker is not found, and the removeFlag is true,
  // then the entire string is returned and the sb is cleared.
  // For example:
  sb.clear();
  sb.append('111--222--333--444');
  marker = '--';
  removeFlag = true;
  while (sb.length > 0) {
    substr = sb.getBefore(marker, removeFlag);
    console.log(`substr = ${substr}, sb contains: ${sb.getAsString()}`);
  }

  // Output is:
  // substr = 111, sb contains: 222--333--444
  // substr = 222, sb contains: 333--444
  // substr = 333, sb contains: 444
  // substr = 444, sb contains: 
}