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/*
String substring()
Examples of how to use substring in a String
created 27 Jul 2010,
modified 2 Apr 2012
by Zach Eveland
This example code is in the public domain.
https://www.arduino.cc/en/Tutorial/BuiltInExamples/StringSubstring
*/
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
// send an intro:
Serial.println("\n\nString substring():");
Serial.println();
}
void loop() {
// Set up a String:
String stringOne = "Content-Type: text/html";
Serial.println(stringOne);
// substring(index) looks for the substring from the index position to the end:
if (stringOne.substring(19) == "html") {
Serial.println("It's an html file");
}
// you can also look for a substring in the middle of a string:
if (stringOne.substring(14, 18) == "text") {
Serial.println("It's a text-based file");
}
// do nothing while true:
while (true);
}
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