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Skip List vs. Binary Search Tree
...of concurrent accesses. This is what makes skip lists special, other lock based data structures tend to croak under pressure.
Lock-free skip lists are consistently faster than locking skip lists but only barely.
transactional skip lists are consistently 2-3 times slower than the locking and non-loc...
What's the u prefix in a Python string?
... 3.0-3.2 will break. Because you need to decide if you care to use six.text_type() everywhere for the (hopefully miniscule) number of people still using 3.[012] - at least the information is there so you can choose.
– dwanderson
Aug 22 '18 at 0:31
...
How to secure MongoDB with username and password
...ata/db
2) Connect to the instance.
mongo
3) Create the user.
use some_db
db.createUser(
{
user: "myNormalUser",
pwd: "xyz123",
roles: [ { role: "readWrite", db: "some_db" },
{ role: "read", db: "some_other_db" } ]
}
)
4) Stop the MongoDB instance and start it aga...
continue processing php after sending http response
My script is called by server. From server I'll receive ID_OF_MESSAGE and TEXT_OF_MESSAGE .
12 Answers
...
Can a pointer to base point to an array of derived objects?
...
When indexing a pointer, the compiler will add the appropriate amount based on the size of what's located inside the array. So say that sizeof(Shape) = 4 (as it has no member variables). But sizeof(Rectangle) = 12 (exact numbers are likely wrong).
So when you index starting at say... 0x0 for t...
Form inside a form, is that alright? [duplicate]
...t" name="foo" form="saveForm" />
<input type="hidden" value="some_id" form="deleteForm" />
<input type="text" name="foo2" id="foo2" form="saveForm" value="success" />
<input type="submit" name="save" value="Save" form="saveForm" onclick="alert(document.getElementById('...
Redirecting EC2 Elastic Load Balancer from HTTP to HTTPS
... RedirectConfig:
Protocol: HTTPS
StatusCode: HTTP_301
Port: 443
If you still use Classic Load Balancers, go with one of the NGINX configs described by the others.
share
|
...
How can I Remove .DS_Store files from a Git repository?
How can I remove those annoying Mac OS X .DS_Store files from a Git repository?
25 Answers
...
Apply style ONLY on IE
...mp; JS hacks beyond IE.
/***** Attribute Hacks ******/
/* IE6 */
#once { _color: blue }
/* IE6, IE7 */
#doce { *color: blue; /* or #color: blue */ }
/* Everything but IE6 */
#diecisiete { color/**/: blue }
/* IE6, IE7, IE8, but also IE9 in some cases :( */
#diecinueve { color: blue\9; }
/* IE7...
How to initialize a two-dimensional array in Python?
...
A pattern that often came up in Python was
bar = []
for item in some_iterable:
bar.append(SOME EXPRESSION)
which helped motivate the introduction of list comprehensions, which convert that snippet to
bar = [SOME EXPRESSION for item in some_iterable]
which is shorter and sometimes cle...