大约有 30,000 项符合查询结果（耗时：0.0364秒） [XML]
What does “javascript:void(0)” mean?
I've seen such href s many times, but I don't know what exactly that means.
14 Answers
...
Possibility of duplicate Mongo ObjectId's being generated in two different collections?
...ing to be unique across collections. See below for what "almost certainly" means.
Long Answer
The BSON Object ID's generated by Mongo DB drivers are highly likely to be unique across collections. This is mainly because of the last 3 bytes of the ID, which for most drivers is generated via a static...
differentiate null=True, blank=True in django
...urations:
null=False, blank=False: This is the default configuration and means that the value is required in all circumstances.
null=True, blank=True: This means that the field is optional in all circumstances. (As noted below, though, this is not the recommended way to make string-based fields op...
How to install trusted CA certificate on Android device?
...ve it trust the SSL certificates generated by Charles SSL Proxying.
This means that you can only use SSL Proxying with apps that you
control.
In order to configure your app to trust Charles, you need to add a
Network Security Configuration File to your app. This file can
override the sy...
When should I use uuid.uuid1() vs. uuid.uuid4() in python?
...@Guilaume How have you calculated this chance of 1%? 14 bits of randomness means the collision will guaranteed to happen if you generate >= 2^14 ids per 100ns and this means that 1% chance of a collision is when you produce roughly 163 ids per 100 ns
– maks
...
Patterns for handling batch operations in REST web services?
...L is in effect "the resources we are targeting" hence:
[GET] mail/1
means get the record from mail with id 1 and
[PATCH] mail/1 data: mail[markAsRead]=true
means patch the mail record with id 1. The querystring is a "filter", filtering the data returned from the URL.
[GET] mail?ma...
Why does JPA have a @Transient annotation?
...
@Jawher , here for transient not presistant means to not to presist any value or it will insert default value for that attribute.
– Satish Sharma
Jan 4 '13 at 11:31
...
How to get the Android device's primary e-mail address
...
@Muzikant It's by no means an official statement, but it's something that's fairly unlikely to change. Having said that, the "correct" way of accessing a user's email addresses is Method B. That is more "official" and the fact that it's behind so...
What's the difference between Ruby's dup and clone methods?
...n and states the differences. It's also worth noting that both methods are meant for different situations as stated by the Object#dup documentation. The use case for clone is cloning an object with the intention to use it as that same instance (while having a different object id), while dup is inten...
How to find third or nth maximum salary from salary table?
...
If you want optimize way means use TOP Keyword, So the nth max and min salaries query as follows but the queries look like a tricky as in reverse order by using aggregate function names:
N maximum salary:
SELECT MIN(EmpSalary)
FROM Salary
WHERE Emp...