All Questions

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What is the underline for numeric literals?

What is the use of underline (_) in the situations below: float pi = 3.14159_26535_89793_23846; long bytes = 00101001_00100110_01100001; int n = 1____________________1;     
asked on 05.10.2017 / 22:22
2
answers

How do I read the log of incoming and outgoing calls on the iPhone using Xamarin?

How do I read the history record of incoming and outgoing calls on the iPhone using Xamarin? I need to read the log of outgoing / incoming calls on the iPhone. I do not know how to do it and I did not find material in Portuguese about it. Can...
asked on 20.01.2014 / 00:00
2
answers

How can I convert PNG to JPG in C #?

I'm working on an old project that uses ASP Site. I need to convert PNG image to JPG. How to do this? Note : I do not want to rename the file, I want to transform the mime from image/png to image/jpeg .     
asked on 24.11.2017 / 16:50
1
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What is the '...' operator in Javascript?

I've seen some uses of ... but I'm not sure what it's like. Example: var a = [1, 2, 3]; var b = [4, 5, ...a]; How do you call this operator and how does it work?     
asked on 03.01.2018 / 14:30
2
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Everything I do with JQuery I can do with JavaScript?

I have a serious problem that is: I'm learning jQuery before JavaScript, and I think now I'm going to get it wrong, put my sites on jQuery only, and I'm realizing it's a bad practice. But returning the question: Everything I do with jQuery I...
asked on 05.06.2017 / 13:32
1
answer

What is a pure function?

While studying functional programming, I quite heard the term "pure function", or pure function . What characterizes this type of function and what is its importance for the functional paradigm? Without locking up the functional programming...
asked on 15.11.2017 / 11:35
1
answer

What is long polling?

Always when I search for "periodic updates" and "real-time notifications" for web applications, I come across the term long polling . For the little that I understand, it seems to refer to periodic updates made with AJAX, for example with a%...
asked on 11.11.2017 / 04:27
2
answers

How to run Android projects in Eclipse on a smartphone?

I have a MotoG and by no means am I able to connect it (via USB) to Eclipse to run the Android Application projects directly on the device.     
asked on 11.02.2014 / 18:25
2
answers

Is there a difference between assigning value using '-' or '=' in R?

In practical terms there seems to be no difference, but underneath the cloth as the language processes is there any difference?     
asked on 20.10.2016 / 01:17
1
answer

Difference between std :: list, std :: vector and std :: array

All containers used to guard data sequentially, but what are the main differences between them?     
asked on 04.11.2016 / 17:30