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Detecting 'stealth' web-crawlers
...d have DNSRBL with their IPs).
Use tricky URLs and HTML:
<a href="//example.com/"> = http://example.com/ on http pages.
<a href="page&#hash"> = page& + #hash
In HTML you can use plenty of tricks with comments, CDATA elements, entities, etc:
<a href="foo<!-...
PostgreSQL create table if not exists
...
CREATE TABLE myschema.mytable (i integer);
END IF;
END
$func$;
Call:
SELECT create_mytable(); -- call as many times as you want.
Notes:
The columns schemaname and tablename in pg_tables are case-sensitive. If you double-quote identifiers in the CREATE TABLE statement, you need ...
How do I use WebRequest to access an SSL encrypted site using https?
I'm writing a program that reads content from a user provided URL. My problem is in the code that goes something like this:
...
Wget output document and headers to STDOUT
...ng the standard error to the standard output as a possible solution. For example, in bash:
$ wget -q -S -O - 2>&1 | grep ...
or
$ wget -q -S -O - 1>wget.txt 2>&1
The -q option suppresses the progress bar and some other annoyingly chatty parts of the wget output.
...
Least common multiple for 3 or more numbers
How do you calculate the least common multiple of multiple numbers?
31 Answers
31
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CSS center text (horizontally and vertically) inside a div block
...child, which is called a "flex item":
#content {
flex: 0 0 120px;
}
Example: http://jsfiddle.net/2woqsef1/1/
To shrink-wrap the content, it is even simpler: just remove the flex: ... line from the flex item, and it is automatically shrink-wrapped.
Example: http://jsfiddle.net/2woqsef1/2/
The...
Backbone View: Inherit and extend events from parent
...
Good call, though you probably want to swap this.events & ParentView.prototype.events otherwise if both define handlers on the same event the Parent's handler will override the Child's.
– soldier.moth
Apr 6 '12 at 0:03
...
How to get time in milliseconds since the unix epoch in Javascript? [duplicate]
...
This would bomb out in php where you would need to do (new DateTime)->format('U') but js is ok without the parens
– chiliNUT
Aug 29 '17 at 2:38
...
Move existing, uncommitted work to a new branch in Git
...ve your current branch as it is, create and checkout a new branch and keep all your changes. You can then stage changes in files to commit with:
git add <files>
and commit to your new branch with:
git commit -m "<Brief description of this commit>"
The changes in the working direct...
How can building a heap be O(n) time complexity?
...itten this to describe how a max heap works. This is the type of heap typically used for heap sort or for a priority queue where higher values indicate higher priority. A min heap is also useful; for example, when retrieving items with integer keys in ascending order or strings in alphabetical order...