FAQ Database Discussion Community


OSX C++ Xcode: Pasting long input into console gives upside down question marks

c++,import,cin,getline,questionmark
We've made a program that takes a long string of tab-delimited input pasted into the console window and splits it up into the correct variables. However, lately with some long strings of metadata, a bunch of upside down question marks have appeared - sometimes after what has been pasted in,...

Checking, if optional parameter is provided in Dart

syntax,dart,syntax-error,questionmark
I'm new to Dart and just learning the basics. The Dart-Homepage shows following: It turns out that Dart does indeed have a way to ask if an optional parameter was provided when the method was called. Just use the question mark parameter syntax. Here is an example: void alignDingleArm(num axis,...

XMLPullParser black diamond question marks with certain characters

android,xml,character-encoding,xmlpullparser,questionmark
I'm making an android app, that needs to fetch and parse XML. The class for that was made following the instructions from here http://www.tutorialspoint.com/android/android_rss_reader.htm and the fetcher method looks like this: public void fetchXML() { Thread thread = new Thread(new Runnable() { @Override public void run() { try { URL...

Celery worker's log contains question marks (???) instead of correct unicode characters

python,logging,unicode,celery,questionmark
I'm using Celery 3.1.18 with Python 2.7.8 on CentOS 6.5. In a Celery task module, I have the following code: # someapp/tasks.py from celery import shared_task from celery.utils.log import get_task_logger logger = get_task_logger(__name__) @shared_task() def foo(): logger.info('Test output: %s', u"测试中") I use the initd script here to run a Celery...

Swift: call methods of an optional variable

swift,optional,questionmark
So I know the difference between '!' and '?', I just want to know what is the best way to use them when calling a method of an optional variable var bar: Bar? = nil bar?.doSomething() // this will be valid, but wouldn't call doSomething bar!.doSomething() // Given error: EXC_BAD_INSTRUCTIONS...

Serialdata communication between c# and arduino

c#,serial-port,arduino,questionmark
here is my problem. I use thise piece of code to send a string to my arduino with a serialport: Arduino.Open(); Arduino.WriteLine("1.5,3.7,2"); After that I receive it with my arduino like this: char buffer[12]; String inc; void setup() { Serial.begin(115200); } void loop() { if (Serial.available() >= 11) { for...

Does every exception have an required try-catch?

java,exception,try-catch,questionmark
A simple question and I can't find the answer for it. Is it required to every exception in Java to use a try-catch? Or is it only for the FileNotFoundException? A lot of exceptions (IndexOutOfBoundException, ArithmeticException, IlligalArgumentException, NullPointerException) are saying that they didn't need an Exception, but FileNotFoundException does)... and...