how to concat strings coming from serial input?

Programming Questions

ashubhatt

how to concat strings coming from serial input?

in Programming Questions • 6 months ago

I want to concat strings until i get a comma (,) in between strings.

For example :

If i'm getting data :

23.02

q23e489,

8923.09

q344,

345,

234

how to concat above data?

And split the data only when i get a comma in between.

so that i get the final result as:

23.02q23e489

8923.09q344

2345

234

Thanks 4 any help.

Replies(8)

PhiLho

Re: how to concat strings?

6 months ago

Look at the split() and join() functions.

debashish

Re: how to concat strings?

6 months ago

hi ashu,

one solution can be concatenate the strings using '+'; then finally use the

String[] result = myString.split(myDelimiter);

where the myDelimiter is the comma...???

lemme know if u followed...

thanks,
debashish

ramin

Re: how to concat strings?

6 months ago

I assume you have the string in an array or something. So one way to do it:

String[] words = {
"23.02",
"q23e489,",
"8923.09",
"q344,",
"2",
"345,",
"234"
};
ArrayList<String> result= new ArrayList<String>();
String actWord="";
for (String w : words) {
actWord += w;
if (w.endsWith(",")) {
result.add(actWord.substring(0,actWord.length()-1));
actWord = "";
}
}
result.add(new String(actWord));
for (String w : result)
println(w);

ashubhatt

Re: how to concat strings?

6 months ago

The data is coming serially to processing.

I cannot use join() function because I dont know the length of array.

Because the data may come in 3 parts until a comma appears or it may come in 4 parts.

Again I dont know how will i use + operator without storing the input data.

Please help.

ramin

Re: how to concat strings?

6 months ago

ha okay. these guys where quicker, and their solution is much more elegant

ashubhatt

Re: how to concat strings?

6 months ago

Ramin your method can only work on Arrays but my data is coming serially, so it can not work.

Does anybody know another method?

ramin

Re: how to concat strings coming from serial input?

6 months ago

Well then you have to buffer them in an arraylist, and create a new word after each ,

ramin

Re: how to concat strings coming from serial input?

6 months ago

like here.

I just have the strings in an array for simplicity, but everytime you receive a string from the serial call the method incomingstring

String actualWord= "";
ArrayList<String> result = new ArrayList<String>();
void setup() {
String[] words = {
"23.02",
"q23e489,",
"8923.09",
"q344,",
"2",
"345,",
"234"
};
for (String w : words)
incomingString(w);
for (String w : result)
println(w);
}
void draw() {
}
void incomingString(String s) {
actualWord+=s;
if (s.endsWith(",")) {
result.add(actualWord.substring(0, actualWord.length()-1));
actualWord= "";
}
}

In this example 234 is not printed, because there was no , yet

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