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Commit 960fcd3

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Expand String examples with explicit size concat and constructor
This expands examples to show the newly added APIs: String::concat(const char *, unsigned int) String::String(const char *, unsigned int) Since not all cores versions will support this right away, a version check is added against ARDUINO_CORE_API.
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‎build/shared/examples/08.Strings/StringAppendOperator/StringAppendOperator.ino

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@@ -67,6 +67,23 @@ void loop() {
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stringTwo.concat(millis());
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Serial.println(stringTwo); // prints "The millis(): 43534" or whatever the value of the millis() is
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#if ARDUINO_API_VERSION >= 10000
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// using concat with an explicit length argument to add only a part of
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// a string:
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stringOne = "Only part: ";
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char *to_add = "use this but not this";
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stringOne.concat(to_add, 8);
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Serial.println(stringOne); // prints "Only part: use this"
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// using concat with an explicit length argument to add a
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// non-zero-terminated string / char array (note that it will be
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// terminated inside the String object).
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stringTwo = "Unterminated: ";
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char unterminated[] = {'n', 'o', 'n', 'u', 'l'};
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stringTwo.concat(unterminated, sizeof(unterminated));
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Serial.println(stringTwo); // prints "Unterminated: nonul"
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#endif // ARDUINO_API_VERSION
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// do nothing while true:
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while (true);
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}

‎build/shared/examples/08.Strings/StringConstructors/StringConstructors.ino

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@@ -74,6 +74,21 @@ void loop() {
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stringOne = String(5.698, 2);
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Serial.println(stringOne);
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#if ARDUINO_API_VERSION >= 10000
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// Using an explicit length argument to to use only a part of a
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// string:
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char *to_add = "use this but not this";
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stringOne = String(to_add, 8);
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Serial.println(stringOne); // prints "use this"
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// using explicit length argument to add a non-zero-terminated string
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// / char array (note that it will be terminated inside the String
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// object).
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char unterminated[] = {'n', 'o', 'n', 'u', 'l'};
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stringTwo = String(unterminated, sizeof(unterminated));
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Serial.println(stringTwo); // prints "nonul"
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#endif // ARDUINO_API_VERSION
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// do nothing while true:
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while (true);
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