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Is errno thread-safe?
...a thread
might end up checking errno after it
has already been updated by another
thread.
To circumvent the resulting
nondeterminism, POSIX.1c redefines
errno as a service that can access the
per-thread error number as follows
(ISO/IEC 9945:1-1996, §2.4):
Some functions may ...
Removing Data From ElasticSearch
...ly remove the data itself. The other stuff I've seen points to the Delete by Query feature. However, I'm not even sure what to query on. I know my indexes. Essentially, I'd like to figure out how to do a
...
How do I select an element in jQuery by using a variable for the ID?
...
Doing $('body').find(); is not necessary when looking up by ID; there is no performance gain.
Please also note that having an ID that starts with a number is not valid HTML:
ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, di...
Random “Element is no longer attached to the DOM” StaleElementReferenceException
... Consider the following scenario:
WebElement element = driver.findElement(By.id("foo"));
// DOM changes - page is refreshed, or element is removed and re-added
element.click();
Now at the point where you're clicking the element, the element reference is no longer valid. It's close to impossible f...
Split a string by spaces — preserving quoted substrings — in Python
..., because regex syntax can easily describe "whitespace or thing-surrounded-by-quotes", and most regex engines (including Python's) can split on a regex. So if you're going to use regexes, why not just say exactly what you mean?:
test = 'this is "a test"' # or "this is 'a test'"
# pieces = [p for ...
Paging with Oracle
... (
SELECT * FROM ORDERS WHERE CustomerID LIKE 'A%'
ORDER BY OrderDate DESC, ShippingDate DESC
) a
WHERE rownum < ((pageNumber * pageSize) + 1 )
)
WHERE r__ >= (((pageNumber-1) * pageSize) + 1)
...
AngularJS sorting by property
What I am trying to do is sort some data by property. Here is example that I tought should work but it doesn't.
10 Answers
...
How to intercept all AJAX requests made by different JS libraries
...
As kindly pointed out by by Firefox AMO Editor Rob W,
The following code changes the behavior of XMLHttpRequest. By default,
if the third ("async") parameter is not specified, it defaults to
true. When it is specified and undefined, it is...
How do you do a limit query in JPQL or HQL?
...use
setMaxResults().
So if it worked in Hibernate 2, it seems that was by coincidence, rather than by design. I think this was because the Hibernate 2 HQL parser would replace the bits of the query that it recognised as HQL, and leave the rest as it was, so you could sneak in some native SQL. Hi...
How do I use reflection to call a generic method?
...eed to use reflection to get the method to start with, then "construct" it by supplying type arguments with MakeGenericMethod:
MethodInfo method = typeof(Sample).GetMethod(nameof(Sample.GenericMethod));
MethodInfo generic = method.MakeGenericMethod(myType);
generic.Invoke(this, null);
For a stati...