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How can I quantify difference between two images?
...s on the first image to edges on the second.
Is there noise in the image?
All sensors pollute the image with some amount of noise. Low-cost sensors have more noise. You may wish to apply some noise reduction before you compare images. Blur is the most simple (but not the best) approach here.
What k...
How to flush output of print function?
...e)
On Python 2 you'll have to do
import sys
sys.stdout.flush()
after calling print. By default, print prints to sys.stdout (see the documentation for more about file objects).
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improve t...
Exploitable PHP functions
...purpose isn't to list functions that should be blacklisted or otherwise disallowed. Rather, I'd like to have a grep -able list of red-flag keywords handy when searching a compromised server for back-doors.
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Force IE compatibility mode off using tags
I am doing work for a client who forces compatibility mode on all intranet sites. I was wondering if there is a tag I can put into my HTML that forces compatibility mode off.
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How to get line count of a large file cheaply in Python?
...
You can't get any better than that.
After all, any solution will have to read the entire file, figure out how many \n you have, and return that result.
Do you have a better way of doing that without reading the entire file? Not sure... The best solution will always ...
In MySQL, can I copy one row to insert into the same table?
...an existing row in the table) but I want to do this without having to list all the columns after the "select", because this table has too many columns.
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error: ‘uint16_t’ does not name a type - c++1y / stl - 清泛IT社区，为创新赋能！
...ight notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF ...
How can I maximize a split window?
... a reputable source, I'm going to hold that as your personal preference, really. I'm usually not using them, but I've recently found I'm using them for thigns like this (maximizing a sidebuffer temporarily; doing power stuff like having multiple disjoint side-by-side diffs in a single vim session). ...
Any way to delete in vim without overwriting your last yank? [duplicate]
... This is probably the simplest but effective solution! I've found that all I need is the most-recent yank in 99% cases. And this trick just scratches the itch!
– John Chain
Oct 14 '13 at 20:40
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How can I force users to access my page over HTTPS instead of HTTP?
...
The way I've done it before is basically like what you wrote, but doesn't have any hardcoded values:
if($_SERVER["HTTPS"] != "on")
{
header("Location: https://" . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"]);
exit();
}
...