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What would cause an algorithm to have O(log log n) complexity?
...ly two main routes that will arrive at this runtime.
Shrinking by a Square Root
As mentioned in the answer to the linked question, a common way for an algorithm to have time complexity O(log n) is for that algorithm to work by repeatedly cut the size of the input down by some constant factor on each...
SQL “select where not in subquery” returns no results
...LEFT JOIN / IS NULL: Oracle
NOT IN vs. NOT EXISTS vs. LEFT JOIN / IS NULL: MySQL
There are three ways to do such a query:
LEFT JOIN / IS NULL:
SELECT *
FROM common
LEFT JOIN
table1 t1
ON t1.common_id = common.common_id
WHERE t1.common_id IS NULL
NOT EXISTS:
SELECT *
FROM...
How to specify in crontab by what user to run script? [closed]
I have few crontab jobs that run under root, but that gives me some problems. For example all folders created in process of that cron job are under user root and group root.
How can i make it to run under user www-data and group www-data so when i run scripts from my website i can manipulate those ...
Two versions of python on linux. how to make 2.7 the default
...on
cd /usr/bin
ls -l
Here you can see something like this
lrwxrwxrwx 1 root root 9 Mar 7 17:04 python -> python2.7
your default python2.7 is soft linked to the text 'python'
So remove the softlink python
sudo rm -r python
then retry the above command
ls -l
you can see ...
Access-Control-Allow-Origin wildcard subdomains, ports and protocols
...IfModule mod_rewrite.c>
<IfModule mod_headers.c>
# Define the root domain that is allowed
SetEnvIf Origin .+ ACCESS_CONTROL_ROOT=yourdomain.com
# Check that the Origin: matches the defined root domain and capture it in
# an environment var if it does
RewriteEngine On
...
Difference between validate(), revalidate() and invalidate() in Swing GUI
... synchronized (getTreeLock()) {
invalidate();
Container root = getContainer();
if (root == null) {
// There's no parents. Just validate itself.
validate();
} else {
while (!root.isValidateRoot()) {
if (root.getCon...
Is it possible to group projects in Eclipse?
...whichever projects you defined into the working set. You can also show the union of various sets, and similar gymnastics.
You can define/edit/delete working sets from the little triangle dropdown menu on the Package Explorer and similar directory views.
...
XML Serialization - Disable rendering root element of array
Can I somehow disable rendering of root element of collection?
3 Answers
3
...
What is the difference between HAVING and WHERE in SQL?
... Methinks you are quoting me out of context. The question was about mySQL's apparent deviation from the Standard, all but the last paragraph of my answer describes the Standard behaviour, and the last alludes to " the implicit GROUP BY clause mentioned in other answers." Are you saying your d...
Repository Pattern vs DAL
...y in your domain. A repository on the other hand only deals with aggregate roots.
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