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How can I create or use a global variable in a function? If I create a global variable in one function, how can I use that global variable in another function? Do I need to store the global variable in a local variable of the function which needs its access? You can use a global variable within other functions by declaring it as global within each function that assigns a value to it: globvar = 0..

Does anybody know how to easily undo a git rebase? The only way that comes to mind is to go at it manually: git checkout the commit parent to both of the branches then create a temp branch from there cherry-pick all commits by hand replace the branch in which I rebased by the manually-created branch In my current situation this is gonna work because I can easily spot commits from both branches (..

I just had an interview where I was asked to create a memory leak with Java. Needless to say, I felt pretty dumb having no clue on how to even start creating one. What would an example be? Here's a good way to create a true memory leak (objects inaccessible by running code but still stored in memory) in pure Java: The application creates a long-running thread (or use a thread pool to leak even f..

This question's answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions. I'm looking for a string.contains or string.indexof method in Python. I want to do: if not somestring.contains("blah"): continue You can use the in operator: if "blah" not in somestring: continue Michael Mrozek If it's just a substring search you ..

Consider the following code: 0.1 + 0.2 == 0.3 -> false 0.1 + 0.2 -> 0.30000000000000004 Why do these inaccuracies happen? Binary floating point math is like this. In most programming languages, it is based on the IEEE 754 standard. The crux of the problem is that numbers are represented in this format as a whole number times a power of two; rational numbers (such as 0.1, which is 1/10) whose den..

How do I generate a random int value in a specific range? I have tried the following, but those do not work: Attempt 1: randomNum = minimum + (int)(Math.random() * maximum); Bug: randomNum can be bigger than maximum. Attempt 2: Random rn = new Random(); int n = maximum - minimum + 1; int i = rn.nextInt() % n; randomNum = minimum + i; Bug: randomNum can be smaller than minimum. In Java 1.7 or lat..

Closed. This question needs to be more focused. It is not currently accepting answers. Closed 6 years ago. Locked. This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. Suppose I'm familiar with developing client-side applications in jQuery, but now I'd like to start using AngularJS. ..

Within my master branch, I did a git merge some-other-branch locally, but never pushed the changes to origin master. I didn't mean to merge, so I'd like to undo it. When doing a git status after my merge, I was getting this message: # On branch master # Your branch is ahead of 'origin/master' by 4 commits. Based upon some instructions I found, I tried running git revert HEAD -m 1 but now I'm get..

I have an EditText and a Button in my layout. After writing in the edit field and clicking on the Button, I want to hide the virtual keyboard when touching outside the keyboard. I assume that this is a simple piece of code, but where can I find an example of it? You can force Android to hide the virtual keyboard using the InputMethodManager, calling hideSoftInputFromWindow, passing in the token ..

People talk about URLs, URIs, and URNs as if they're different things, but they look the same to the naked eye. What are the distinguishable differences between them? URIs identify and URLs locate; however, locators are also identifiers, so every URL is also a URI, but there are URIs which are not URLs. Examples Roger Pate This is my name, which is an identifier. It is like a URI, but cannot be ..