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What is a patch in git version control?
...ave two versions of the file (or even the whole repository) checked out in order to compare them. Doesn't sound that good, does it? So git takes care of all of the hard work for you - it compares your local file with what is there in the repository you are working with, and can show it to you as a "...
Can you help me understand Moq Callback?
...your mock, but they happen concurrently. So you have no way of knowing the order in which they'd get called, but you want to know the calls you expected did take place (irrespective of order). You can do something like this:
var cq = new ConcurrentQueue<bool>();
mock.Setup(f => f.Bar(It.Is...
Peak detection in a 2D array
...tains the peaks we are
#looking for, but also the background.
#In order to isolate the peaks we must remove the background from the mask.
#we create the mask of the background
background = (image==0)
#a little technicality: we must erode the background in order to
#succes...
Sticky and NON-Sticky sessions
...ct way of one knowing what is there in the session object of the other. In order to synchronize between these server sessions, you may have to write/read the session data into a layer which is common to all - like a DB. Now writing and reading data to/from a db for this use-case may not be a good id...
How should you build your database from source control?
...scripts named liked 001_AlterXXX.sql, so that running them in natural sort order will upgrade from version A to B)
Which types of objects shouldn't be version controlled?
Sequences?
Grants?
User Accounts?
see 2. If your users/roles (or technical user names) are different between environments, yo...
How can you tell when a layout has been drawn?
I have a custom view that draws a scrollable bitmap to the screen. In order to initialize it, i need to pass in the size in pixels of the parent layout object. But during the onCreate and onResume functions, the Layout has not been drawn yet, and so layout.getMeasuredHeight() returns 0.
...
What are enums and why are they useful?
...tants, which may override methods).
Implementing an interface (or more) in order to not bind the client code to the enum (which should only provide a set of default implementations).
The simplest example would be a set of Comparator implementations:
enum StringComparator implements Comparator<...
Why is lock(this) {…} bad?
...enerally out of your control who else might be locking on that object.
In order to properly plan parallel operations, special care should be taken to consider possible deadlock situations, and having an unknown number of lock entry points hinders this. For example, any one with a reference to the o...
Check synchronously if file/directory exists in Node.js
...t the top, followed by the various answers over the years in chronological order:
Current Answer
You can use fs.existsSync():
const fs = require("fs"); // Or `import fs from "fs";` with ESM
if (fs.existsSync(path)) {
// Do something
}
It was deprecated for several years, but no longer is. F...
Removing duplicates from a list of lists
...[[1, 2], [4], [5, 6, 2], [3]]
Simple to comprehend, and you preserve the order of the first occurrence of each element should that be useful, but I guess it's quadratic in complexity as you're searching the whole of new_k for each element.
...