大约有 19,000 项符合查询结果（耗时：0.0478秒） [XML]
All falsey values in JavaScript
...ues in JavaScript
false
Zero of Number type: 0 and also -0, 0.0, and hex form 0x0 (thanks RBT)
Zero of BigInt type: 0n and -0n (new in 2020, thanks GetMeARemoteJob)
"", '' and `` - strings of length 0
null
undefined
NaN
document.all (in HTML browsers only)
This is a weird one. document.all is a...
Using Kafka as a (CQRS) Eventstore. Good idea?
...nsumption, after which it
will be discarded to free up space. Kafka's performance is effectively
constant with respect to data size so retaining lots of data is not a
problem.
So while messages can potentially be retained indefinitely, the expectation is that they will be deleted. This doesn...
fastest MD5 Implementation in JavaScript
...e writing his implementation. It's a good read for anyone interested in performant javascript.
http://www.webreference.com/programming/javascript/jkm3/
His MD5 implementation can be found here
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What is the difference between UTF-8 and Unicode?
...(7 bits). With 26 letters in the alphabet, both in capital and non-capital form, numbers and punctuation signs, that worked pretty well. ASCII got extended by an 8th bit for other, non-English languages, but the additional 128 numbers/code points made available by this expansion would be mapped to d...
What is the >>>= operator in C?
...the equivalent of:
int i = 10;
while( i >>= 1)
which is simply performing (integer) division by 2 in each iteration, producing the sequence 5, 2, 1.
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How do I iterate over an NSArray?
...t
}
This construct is used to enumerate objects in a collection which conforms to the NSFastEnumeration protocol. This approach has a speed advantage because it stores pointers to several objects (obtained via a single method call) in a buffer and iterates through them by advancing through the buf...
Numpy first occurrence of value greater than existing value
... above comment, this answer is off by one if N/2 is not in aa. The correct form would be np.searchsorted(aa, N/2, side='right') (without the +1). Both forms give the same index otherwise. Consider the test case of N being odd (and N/2.0 to force float if using python 2).
– aske...
How do I prevent site scraping? [closed]
...culties that I've encountered while writing scrapers, as well as bits of information and ideas from around the interwebs.
How to stop scraping
You can't completely prevent it, since whatever you do, determined scrapers can still figure out how to scrape. However, you can stop a lot of scraping by...
Correct file permissions for WordPress [closed]
...s on the best file permissions. I also took a look at some of WordPress's form's questions over here too but anybody that suggests 777 obviously needs a little lesson in security.
...
Payment Processors - What do I need to know if I want to accept credit cards on my website? [closed]
... TCP/IP communication with their API. They will process the credit card information on your behalf. Two vendors are Authorize.Net and PayFlow Pro. The link I provide below has some more information on other vendors.
Now what? For starters there are guidelines on what your application has to adhe...