An instance is a specific realization of any object.
Questions tagged [instances]
516 questions
9
votes
3 answers
Python max with same number of instances
I have a list:
hello = ['1', '1', '2', '1', '2', '2', '7']
I wanted to display the most common element of the list, so I used:
m = max(set(hello), key=hello.count)
However, I realised that there could be two elements of the list that occur the…
james_kansas
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9
votes
4 answers
Cloning vs. Instantiating a new class
Is cloning good practice in this case? How to do it better?
public ModelCollection startParsing() {
return parseFeed(new ModelSpecialEntry);
}
public ModelCollection parseFeed(ModelEntry pattern) {
ModelCollection modelCollection = new…
OneWorld
- 17,512
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9
votes
3 answers
How to run multiple instances of jetty with maven
So, what I want to do is configure maven plugin jetty to run multiple - in my case two - instances of jetty server on different ports and with different apps.
So, I want to have something like:
localhost:8080/webapp1
localhost:8081/webapp2
And I…
Johnny
- 113
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- 4
8
votes
2 answers
App Engine - Too many open instances
My app is running on App engine Java SDK, and since this morning I noticed that open instances are not handling new requests, and instead, new Frontent instances are being started.
So now i have about 250 open instances (a lot more than…
Andrei F
- 4,205
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7
votes
1 answer
GAE: memcache: is it the same across multiple app instances
I have a pretty basic question: In GAE, if I use memcache to store some data once it was retrieved for the first time from the db, if then that data remains in the cache for like 2 days, do ALL instances of said application get to "see" it and…
Shivan Dragon
- 15,004
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7
votes
1 answer
Delete a mutex from another process
Using the topic Overview - Handle Enumeration, number 5, the attempt Close mutex of another process and and information from Mutex analysis, the canary in the coal mine and discovering new families of malware/, I have came up with:
Attempt 1:…
ParoX
- 5,685
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7
votes
2 answers
Mysql 5.7 Could not create unix socket lock file
I am trying to create multiple instances of MySQL 5.7 in the same Ubuntu 16.10 32-bit box. I have copied the original data dir to the new one. Created separate log folder for the new instance(the logs are working). Changed the owner to mysql:mysql…
Mallik Kumar
- 540
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7
votes
1 answer
Creating Instance of Eq for custom data type in Haskell
I have made some custom Data types for number representation in Haskell, now I want to implement Eq instances for it, but I am somehow stuck. So I have already made:
data Digit = Zero | One | Two
type Digits = [Digit]
data Sign = Pos | Neg -- Pos…
Pegasus Thorn
- 159
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7
votes
2 answers
How do you create an instance of an instance in JavaScript
I want to make unique instances of a set of cars that different people can hold. The cars will have similar base specs but some of their properties and methods will vary.
The problem I have is that I can't work out how this should work. How do you…
jamcd
- 101
- 4
7
votes
1 answer
Data.Vector.Binary overlaps Binary [a] instance
In my application I need to serialize a vector containing an arbitrary datatype, in this case is a list of Doubles. For serializing the vector I'm importing Data.Vector.Binary.
When loading the module in GHCi the following error arises:
Overlapping…
uu1101
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- 1
- 4
7
votes
2 answers
Python: functions in a class and memory
If I have a class with several functions:
class Example:
def func1(self):
print 'Hi1'
def func2(self):
print 'Hi2'
def func3(self):
print 'Hi3'
If I create several instances of 'Example', does each instance…
Squall Leohart
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6
votes
3 answers
Open multiple firefox instances with different profiles on Mac OS X
What is the best way to open different firefox instances (firefox 3 to 10) with different profiles (on 10.5, 10.6 and 10.7)?
With versions prior to Firefox-7, modifying the content of the firefox package and adding -no-remote -P {PROFILE}…
Andreas Calvo
- 63
- 1
- 4
6
votes
2 answers
Trying to render a new instance in ReactJS
As an example (real tried code)
I have a component of which I want to initiate a NEW instance for rendering.
import React, { Component } from 'react';
export default class TinyObject extends Component {
constructor(props) {
…
Reneb
- 121
- 2
- 9
6
votes
2 answers
Java: prefer Utility Class depending on a class instance or static methods?
I've a Java class that does something like this
public class MyObjectUtil {
private final MyObject myObject;
public MyObjectUtil (MyObject myObject){
this.myObject = myObject;
}
public boolean…
spike07
- 809
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6
votes
1 answer
Polymorphic class-constrained instances
I want to make all types that are instances of Enum and Bounded also an instances of Random. The following code does this and should work (with the appropriate extensions enabled):
import System.Random
instance (Enum r, Bounded r) => Random r…
Ollie Saunders
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