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At LearnCpp.com | 1.10 - A first look at the preprocessor. Under Header guards, there are those code snippets: ... _H a convention or a must do thing? Thanks. Question&Answers:os...

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r - Displaying text below the plot generated by ggplot2

I am trying to display some information about the data below the plot created in ggplot2. I would like to plot ... pass Y coordinates as percent of the screen. Question&Answers:os...

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Extract images using iTextSharp

I have been using this code with great success to pull out the first image found in each page of a PDF. However, it ... finally { pdf.Close(); raf.Close(); } } Question&Answers:os...

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rust - How do I implement the Add trait for a reference to a struct?

I made a two element Vector struct and I want to overload the + operator. I made all my functions and methods ... struct, but that is not the current question. Question&Answers:os...

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javascript - What is innerHTML on input elements?

I'm just trying to do this from the chrome console on Wikipedia. I'm placing my cursor in the search bar and ... that property if I can't do anything with it? Question&Answers:os...

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git - Triggering Azure DevOps builds based on changes to sub folders

I have a Visual Studio solution with multiple projects, each project is an individual microservice. It is very convenient ... to build? I hope that makes sense! Question&Answers:os...

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Print series of prime numbers in python

I was having issues in printing a series of prime numbers from one to hundred. I can't figure our what's wrong with ... % i == 0: break else: print(num) break Question&Answers:os...

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Tail recursion in C++

Can someone show me a simple tail-recursive function in C++? Why is tail recursion better, if it even ... kinds of recursion are there besides tail recursion? Question&Answers:os...

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php - How can I loop through a MySQL result set more than once using the mysql_* functions?

For whatever reason, I need to go through a MySQL result set twice. Is there a way to do it? I don' ... it stores the rows somewhere and then reuses them later. Question&Answers:os...

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language agnostic - What is name mangling, and how does it work?

Please explain what is name mangling, how it works, what problem it solves, and in which contexts and languages is ... chosen by the compiler and why) a plus. Question&Answers:os...

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How To Get File In Assets From Android NDK

I'm trying to access an image file in the assets folder from the native side. Now I can successfully search ... the asset folder as appose to the sd card. Question&Answers:os...

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PHP: Convert unicode codepoint to UTF-8

I have my data in this format: U+597D or like this U+6211. I want to convert them to UTF-8 (original characters are 好 and 我). How can I do it? Question&Answers:os...

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math - How can I convert radians to degrees with Python?

In the math module, I could only find math.cos(x), with cos/sin/tan/acos/asin/atan. This returns the answer in radians ... on deg, gives me: cos(1) 0.9998476... Question&Answers:os...

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c# - Round a double to x significant figures

If I have a double (234.004223), etc., I would like to round this to x significant digits in C#. So far I can only ... .1, but I would like it to stay at 0.08. Question&Answers:os...

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Ping site and return result in PHP

I'd like to create a small IF procedure that will check if Twitter is available (unlike now, for example), and will return true or false. Help :) Question&Answers:os...

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How to handle Pop-up in Selenium WebDriver using Java

I want to handle sign-in part in rediff.com, but the below code doesn't work for that: driver.get("http://www. ... I can't find the name of the pop-up window. Question&Answers:os...

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timezone - Getting computer's UTC offset in Python

In Python, how do you find what UTC time offset the computer is set to? Question&Answers:os...

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c# - How to get variable name using reflection?

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xml - WCF Error "This could be due to the fact that the server certificate is not configured properly with HTTP.SYS in the HTTPS case"

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c# - Using app.config in .Net Core

I have problem. I need to write a program in .Net Core(C#) which use app.config like this: <?xml version="1 ... and still don't work. Maybe someone can help me? Question&Answers:os...

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android - static variable null when returning to the app

In my app there's a static variable that's being set to null when I return to my app from the external ... there a flag to set to prevent this behavior? Question&Answers:os...

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Escape string Python for MySQL

I use Python and MySQLdb to download web pages and store them into database. The problem I have is that I ... (), is something similar in Python? Thanks. Question&Answers:os...

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amazon web services - CloudFront + S3 Website: "The specified key does not exist" when an implicit index document should be displayed

I've just deployed a static website to Amazon S3, which can currently be viewed here: http://www.rdegges.com.s3- ... of what I can do to fix my settings? Question&Answers:os...

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sql - GROUP BY behavior when no aggregate functions are present in the SELECT clause

I have a table emp with following structure and data: name dept salary ----- ----- ----- Jack a 2 Jill a 1 ... MAX(B.salary) FROM emp B WHERE B.dept = A.dept) Question&Answers:os...

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Python & MySql: Unicode and Encoding

I am parsing json data and trying to store some of the json data into Mysql database. I am currently getting following unicode ... --+ 8 rows in set (0.00 sec) Question&Answers:os...

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types - Why doesn't Java throw an Exception when dividing by 0.0?

I have code to calculate the percentage difference between 2 numbers - (oldNum - newNum) / oldNum * 100; - ... does Java ignore it when it comes to doubles? Question&Answers:os...

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java - How to create my own Appender in log4j?

I am new in log4j. Can anyone explain how to create my own Appender? i.e. how to implement the classes and interfaces and how to override it? Question&Answers:os...

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javascript - Cannot set boolean values in LocalStorage?

I noticed that I cannot set boolean values in localStorage? localStorage.setItem("item1", true); alert(localStorage.getItem(" ... == true); // should be true? Question&Answers:os...

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