All Questions

3
answers

How to make a style for "broken image" (when the image does not load)

How would it be possible to make a CSS style for when the image is not loaded on the page? When you have the link to the image, but for some reason it is not loaded on the page, or if the link or image path is wrong, or if the image is not in...
asked on 09.08.2018 / 14:53
2
answers

Treat Exception by Code

In Visual Basic 6 there was the err.number command where the error code occurred. I have a C # application that treats exception for the message description because I can not find the command that returns the error code. I have a pro...
asked on 10.04.2018 / 19:01
2
answers

Why do I need './' to run commands on Unix?

I noticed that every executable that I need I need by a ./ to run it on both Linux and MacOS (Unix / Unix-like systems). For example, to compile a C file with GCC and run it right away, I make the following commands: $ gcc fonte.c $ ./a...
asked on 30.06.2017 / 11:48
2
answers

ComboBox is not being populated by the Items I want

I have a ComboBox filled in from a list created with information obtained from a txt file. But instead of being filled with the information of the file he is receiving inside it ----- > GeraRelatorio.Planta , would you like to know why...
asked on 27.08.2018 / 14:14
1
answer

Get elements by class / id with pure JavaScript

In jQuery, we use quotation marks to get $('div.oi') . And in pure JavaScript? Piss if we use without quotes is different. If we change the css for example: With jQuery: $('teste').css(teste);     
asked on 05.06.2017 / 19:56
2
answers

box-shadow pick up the four corners of the image

Can anyone tell me how I leave box-shadow in the same key on the right and top on the left and bottom? link HTML:<divid="wrapper_login" class="fixed"></div> CSS: <style type="text/css"> body { font-famil...
asked on 11.04.2018 / 04:00
2
answers

Try catch can be replaced with using?

I've always used the blocks try , catch and finally when programming in Java, and when I switched to C # I noticed that some codes change try/catch by using . Example: using (FileStream fs = new FileStream("...
asked on 07.08.2016 / 03:19
2
answers

How to play audio with PyQt?

Is there any way to run an audio file with PyQt? Is it possible to do this only with PyQt or do you need to install another library?     
asked on 11.11.2016 / 13:48
2
answers

How does the (anti) standard EAV (Entity Attribute Value) work?

I would like a working example, as I do not quite understand this dynamic relationship of creating a type table, with a data table, a dynamic relationship, which many find confusing.     
asked on 04.07.2016 / 15:04
3
answers

Installing with PIP through the requirements.txt file inside VirtualEnv?

I've learned these days that through the pip freeze > requirements.txt command, I can generate a dependency list for a specific project where I'm using VirtualEnv . How do I install all the libraries contained within this r...
asked on 01.06.2017 / 17:16