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How to check if element exists using a lambda expression?
Specifically, I have TabPane, and I would like to know if there is element with specific ID in it.
3 Answers
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How to distinguish mouse “click” and “drag”
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I think the difference is that there is a mousemove between mousedown and mouseup in a drag, but not in a click.
You can do something like this:
const element = document.createElement('div')
element.innerHTML = 'test'
document.body.appe...
Hashset vs Treeset
...t.
It's quite safe to accept default load factor but you may want to specify an initial capacity that's about twice the size to which you expect the set to grow.
TreeSet
guarantees log(n) time cost for the basic operations (add, remove and contains)
guarantees that elements of set will be sor...
Does MS SQL Server's “between” include the range boundaries?
...ETWEEN operator is inclusive.
From Books Online:
BETWEEN returns TRUE if the value of
test_expression is greater than or
equal to the value of begin_expression
and less than or equal to the value of
end_expression.
DateTime Caveat
NB: With DateTimes you have to be careful; if only a ...
Insert text into textarea with jQuery
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How about if the result is coming from a PHP page and handled by jQuery? (in between data is transmitted using Json)
– Abu Rayane
Apr 1 '16 at 6:31
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XmlSerializer giving FileNotFoundException at constructor
...mal behaviour. An exception is thrown but handled by the XmlSerializer, so if you just ignore it everything should continue on fine.
I have found this very annoying, and there have been many complaints about this if you search around a bit, but from what I've read Microsoft don't plan on doing anyt...
How do I erase an element from std::vector by index?
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With advance you must save the iterator in a variable. If you use std::next you can do it in one line: vec.erase( next(begin(vec), 123) );
– dani
Oct 5 '16 at 20:36
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What is the difference between pluck and collect in Rails?
...ill only query the particular field. See this.
When you do:
User.first.gifts.collect(&:id)
You have objects with all fields loaded and you simply get the id thanks to the method based on Enumerable.
So:
if you only need the id with Rails 4, use ids: User.first.gifts.ids
if you only need ...
.Net HttpWebRequest.GetResponse() raises exception when http status code 400 (bad request) is return
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It would be nice if there were some way of turning off "throw on non-success code" but if you catch WebException you can at least use the response:
using System;
using System.IO;
using System.Web;
using System.Net;
public class Test
{
s...
UnicodeDecodeError, invalid continuation byte
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In binary, 0xE9 looks like 1110 1001. If you read about UTF-8 on Wikipedia, you’ll see that such a byte must be followed by two of the form 10xx xxxx. So, for example:
>>> b'\xe9\x80\x80'.decode('utf-8')
u'\u9000'
But that’s just the mechanical ca...