2 Methods to Remove Last Character from String in JavaScript

Source: https://tecadmin.net/remove-last-character-from-string-in-javascript/

Method 1 – substring function

var str= "Hello TecAdmin!";

var newStr = str.substring(0, str.length - 1);

Method 2 – slice function

var str = "Hello TecAdmin!";

var newStr = str.slice(0, -1);

Update a column value, replacing part of a string

Source: https://stackoverflow.com/questions/10177208/update-a-column-value-replacing-part-of-a-string

UPDATE urls
SET url = REPLACE(url, 'domain1.com/images/', 'domain2.com/otherfolder/')

Very useful, worked on 2000 queries with out fail, very quickly. – Andy Dec 14 '16 at 18:05
• 4
  REPLACE also works on SELECTs, quite useful :) – Arda Apr 19 '17 at 10:20

How can we convert an integer to string in Angular

Source:https://stackoverflow.com/questions/22328543/how-can-we-convert-an-integer-to-string-in-angularjs

.toString() is available, or just add "" to the end of the int

var x = 3,
    toString = x.toString(),
    toConcat = x + "";

Angular is simply JavaScript at the core.

String null to empty

You can use Objects.toString() (standard in Java 7):

Objects.toString(gearBox, "")

Objects.toString(id, "")

or 

StringUtils.defaultString(String str)

Returns either the passed in String, or if the String is null, an empty String ("").

 StringUtils.defaultString(null)  = ""
 StringUtils.defaultString("")    = ""
 StringUtils.defaultString("bat") = "bat"