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When and why JPA entities should implement Serializable interface?
...elpful with that, and in the context of persistence more consistent than Cloneable for instance.
– JimmyB
Jul 6 '15 at 10:09
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How to initialize a two-dimensional array in Python?
...By the way, [[foo]*10 for x in xrange(10)] can be used to get rid of one comprehension. The problem is that multiplication does a shallow copy, so new = [foo] * 10 new = [new] * 10 will get you a list containing the same list ten times.
– Scott Wolchok
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How do you simulate Mouse Click in C#?
... If the control doesn't have a PerformClick method, you can extend/add one, just needs to call OnMouseClick with a suitable MouseEventArgs argument.
– Tony Hopkinson
Apr 12 '18 at 22:46
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Java: How to convert List to Map
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With java-8, you'll be able to do this in one line using streams, and the Collectors class.
Map<String, Item> map =
list.stream().collect(Collectors.toMap(Item::getKey, item -> item));
Short demo:
import java.util.Arrays;
import java.util.List;
impo...
Understanding promises in Node.js
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Check also this github.com/medikoo/deferred , Q is one of the first and it's definitely inspiration to many implementations that appeared afterwards, but unfortunately it's very slow and too "theoretical" in some parts, it doesn't play well with some real world scenarios
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Synchronous request in Node.js
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sync-request
By far the most easiest one I've found and used is sync-request and it supports both node and the browser!
var request = require('sync-request');
var res = request('GET', 'http://google.com');
console.log(res.body.toString('utf-8'));
That's it, no ...
How can I tell when HttpClient has timed out?
... @testing They don't behave different. It is just that you have one token that will represent the user cancellation request and an internal (you cannot access and you don't need) that represents the client timeout. It is the use case that differs
– Sir Rufo
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How to use Session attributes in Spring-mvc
...want keep object during user session ,
There are some ways:
directly add one attribute to session:
@RequestMapping(method = RequestMethod.GET)
public String testMestod(HttpServletRequest request){
ShoppingCart cart = (ShoppingCart)request.getSession().setAttribute("cart",value);
return "tes...
Null vs. False vs. 0 in PHP
...uninitialized variable". Nothing plus 1 is 1, while an unknown value plus one is an unknown value. Just remember that any operator applied to null will (should) result in null, because any operation on an "unknown value" results in an unknown value.
– Eli
Oct...
git: undo all working dir changes including new files
...m ignored folders too. So all you local logs and things like that will be gone. Usually it's not a big problem, but it's better to know.
– cyriel
Oct 2 '13 at 12:31
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