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Does “\d” in regex mean a digit?
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For Persian and Arabic , in java and javascript engines, use \p{Nd}
– Alireza Fattahi
Nov 16 '13 at 13:57
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What does it mean to “program to an interface”?
... I didn't understand why you needed them. If we're using a language like Java or C#, we already have inheritance and I viewed interfaces as a weaker form of inheritance and thought, "why bother?" In a sense I was right, you can think of interfaces as sort of a weak form of inheritance, but beyond...
Showing the stack trace from a running Python application
...what is most interesting is to dump all the stacks (which is more like the Java's dump). Here is an implementation based on this blog:
import threading, sys, traceback
def dumpstacks(signal, frame):
id2name = dict([(th.ident, th.name) for th in threading.enumerate()])
code = []
for thr...
Different ways of loading a file as an InputStream
...e.txt") will look for a file in your classpath at the following location: "java/lang/myfile.txt". If your path starts with a /, then it will be considered an absolute path, and will start searching from the root of the classpath. So calling String.class.getResourceAsStream("/myfile.txt") will look a...
What and where are the stack and heap?
... as scratch space". Cool. But where is it actually "set aside" in terms of Java memory structure?? Is it Heap memory/Non-heap memory/Other (Java memory structure as per betsol.com/2017/06/… )
– Jatin Shashoo
Jul 22 '18 at 6:22
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Reading InputStream as UTF-8
...fferedReader(new InputStreamReader(url.openStream(), "UTF-8"));
or since Java 7:
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream(), StandardCharsets.UTF_8));
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Allowed characters in Linux environment variable names
...ers as a part of a variable name. However when one program or script (e.g. java or perl) initializes a variable with special characters in its name and calls another executable (a child process) the latter executable can access that variable without problems.
– oᴉɹǝɥɔ
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JavaScript Editor Plugin for Eclipse [duplicate]
Is there an Eclipse plugin available for JavaScript that allows for syntax checking and autosuggestions for .js files in Eclipse?
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Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
...ry Key: HKLM\SOFTWARE\Classes\Installer\Products\c1c4f01781cc94c4c8fb1542c0981a2a
Configuration: x86
Version: 6.0.2900.2180
Direct Download URL: https://download.microsoft.com/download/8/B/4/8B42259F-5D70-43F4-AC2E-4B208FD8D66A/vcredist_x86.EXE
Visual C++ 2008
Microsoft Visual C++ 2008 Redist...
Elegant way to invert a map in Scala
... = Map(1 -> "one", 2 -> "two")
m: scala.collection.immutable.Map[Int,java.lang.String] = Map(1 -> one, 2 -> two)
scala> val reversedM = m map { case (k, v) => (v, k) }
reversedM: scala.collection.immutable.Map[java.lang.String,Int] = Map(one -> 1, two -> 2)
Note that dupli...