String.substring() not working
Posted:
Sat Sep 26, 2015 10:34 pmby brutzler
Hi, anyone tested the "String.substring()" function? I do not get it working. "String.replace" is fine. Want to eleminate redundate spaces of HTML-code in a string before sending:
Code: Select all while (html_index.substring(0) == " ") {
html_index.replace(" "," ");
}
Re: String.substring() not working
Posted:
Sun Sep 27, 2015 6:42 amby eduperez
I honestly think that the documentation for the String.substring() method could hardly be worse...
String.substring() does not "looks for a given substring from the position given to the end of the string"; it cuts a part of the string and lets you do whatever you want with that part. So, someString.substring(0) returns exactly the same as someString, because "someString.substring(0)" means "cut from the first character of someString, up to the end of someString".
In your code, (html_index.substring(0) == " ") is only true when html_index is exactly " "; far from what you need.
Re: String.substring() not working
Posted:
Mon Sep 28, 2015 3:40 amby brutzler
OK,
sounds like I have to use strstr()
Re: String.substring() not working
Posted:
Mon Sep 28, 2015 9:37 amby JohnSL
brutzler wrote:sounds like I have to use strstr()
You should be able to use indexOf:
https://www.arduino.cc/en/Reference/StringIndexOf -- John