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Extract a regular expression match
... wraps all the existing regular expression operates in a consistent syntax and adds a few that are missing:
library(stringr)
str_locate("aaa12xxx", "[0-9]+")
# start end
# [1,] 4 5
str_extract("aaa12xxx", "[0-9]+")
# [1] "12"
...
When is the thread pool used?
So I have an understanding of how Node.js works: it has a single listener thread that receives an event and then delegates it to a worker pool. The worker thread notifies the listener once it completes the work, and the listener then returns the response to the caller.
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How to explain callbacks in plain english? How are they different from calling one function from ano
...on will set this variable with the information about function to be called and will call the function using the same variable.
In javascript, the example is below. Here we use method argument as a variable where we store information about function.
function processArray(arr, callback) {
var re...
Java Generate Random Number Between Two Given Values [duplicate]
I would like to know how to generate a random number between two given values.
7 Answers
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List of All Locales and Their Short Codes?
I'm looking for a list of all locales and their short codes for a PHP application I am writing. Is there much variation in this data between platforms?
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MacOSX homebrew mysql root password
For some reason MySQL stopped giving access for root. Uninstalled and reinstalled with Homebrew. Fresh install, fresh tables but when I enter
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What is the “assert” function?
I've been studying OpenCV tutorials and came across the assert function; what does it do?
9 Answers
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UIView with rounded corners and drop shadow?
I’ve been working on an application for a couple of years and received a simple design request: Round the corners on a UIView and add a drop shadow.To do as given below.
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how to get html content from a webview?
... html code from a webview?
I have tried several methods from stackoverflow and google, but can't find an exact method. Please mention an exact way.
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Task not serializable: java.io.NotSerializableException when calling function outside closure only o
...sk to fail. Now this doesn't mean that you can serialise an RDD with Spark and avoid NotSerializableException
Spark is a distributed computing engine and its main abstraction is a resilient distributed dataset (RDD), which can be viewed as a distributed collection. Basically, RDD's elements are par...