大约有 45,000 项符合查询结果（耗时：0.0638秒） [XML]
When NOT to use Cassandra?
... time at 2 different ATMs, you will get 2 times $100, and a letter with an extra fee in your mail box. The bank earns money (the extra fee for being below the limit) by using inconsistent data. It's to hard to connect all ATMs in the world with each other through one large relational database. Can y...
Can I run multiple versions of Google Chrome on the same machine? (Mac or Windows)
...fo.plist and change the value of <key>KSUpdateURL</key> to <string>https://tools.google.com/abcdefg</string>. No other method worked for me (including setting defaults write com.google.Keystone.Agent checkInterval 0).
– Abhishek Divekar
...
Static classes and methods in coffeescript
...roLourenço Seems that a CoffeeScript class is a "static block" (with some extra stuff): jsfiddle.net/ambiguous/ap72ckax
– mu is too short
Oct 12 '17 at 17:59
...
Determine Whether Two Date Ranges Overlap
...a syntactical shortcut for what is a longer implementation, which includes extra checks to verify that the start dates are on or before the endDates. Deriving this from above:
If start and end dates can be out of order, i.e., if it is possible that startA > endA or startB > endB, then you a...
Are loops really faster in reverse?
...
i-- is as fast as i++
This code below is as fast as yours, but uses an extra variable:
var up = Things.length;
for (var i = 0; i < up; i++) {
Things[i]
};
The recommendation is to NOT evaluate the size of the array each time. For big arrays one can see the performance degradation.
...
Centering a div block without the width
...S rule. This is a good trick to center a div in a container without adding extra HTML nor applying constraining styles to the container (like text-align: center; which would center all other inline content in the container), while keeping dynamic width for the contained div:
HTML:
<div class="c...
Virtual functions and performance - C++
...an instruction cache miss like a non-virtual function.
In many cases, two extra cache misses are not a concern, but in a tight loop on performance critical code it can dramatically reduce performance.
share
|
...
How do I push amended commit to the remote Git repository?
... .git/config branch section).
And after
git push
Maybe you will get an extra commit with the subject telling about a "Trivial merge".
share
|
improve this answer
|
follow...
Best way to determine user's locale within browser
...er and spits it back out as a JavaScript file with the header value in the string, eg.:
var acceptLanguage= 'en-gb,en;q=0.7,de;q=0.3';
then you could include a <script src> pointing at that external service in the HTML, and use JavaScript to parse the language header. I don't know of any ex...
How do MySQL indexes work?
...lision number is high cause you'll only perform the second comparison (the string one) against the repeated hashes.
Unfortunately, using this technique, you still need to hit the table to compare the url field.
Wrap up
Some facts that you may consider every time you want to talk about optimizatio...