大约有 42,000 项符合查询结果（耗时：0.0749秒） [XML]
Objective-C declared @property attributes (nonatomic, copy, strong, weak)
...ail when I must use each attribute: nonatomic , copy , strong , weak , and so on, for a declared property, and explain what each does? Some sort of example would be great also. I am using ARC.
...
MySQL Error 1215: Cannot add foreign key constraint
...
I'm guessing that Clients.Case_Number and/or Staff.Emp_ID are not exactly the same data type as Clients_has_Staff.Clients_Case_Number and Clients_has_Staff.Staff_Emp_ID.
Perhaps the columns in the parent tables are INT UNSIGNED?
They need to be exactly the same...
What's the meaning of interface{}?
I'm new to interfaces and trying to do SOAP request by github
6 Answers
6
...
Why is sizeof considered an operator?
Why is sizeof considered an operator and not a function?
10 Answers
10
...
Is there a CSS selector for elements containing certain text?
....
You can match on an element, the name of an attribute in the element, and the value of a named attribute in an element. I don't see anything for matching content within an element, though.
share
|
...
How to thoroughly purge and reinstall postgresql on ubuntu? [closed]
... ("clusters") using pg_dropcluster. Use that in preference to a full purge and reinstall if you just want to restart with a fresh PostgreSQL instance.
$ pg_lsclusters
Ver Cluster Port Status Owner Data directory Log file
11 main 5432 online postgres /var/lib/postgresql/11/main /...
How to export/import PuTTy sessions list?
...Path("Desktop") + "\putty.reg")
Import
Double-click on the *.reg file and accept the import.
Alternative ways:
cmd.exe, require elevated command prompt:
regedit /i putty-sessions.reg
regedit /i putty.reg
PowerShell:
reg import putty-sessions.reg
reg import putty.reg
Note: do not repla...
Groovy Shell warning “Could not open/create prefs root node …”
I tried to open the Groovy Shell ( groovysh ) on Windows 8 and got the following output:
9 Answers
...
SyntaxError: Use of const in strict mode
I'm working with node.js, and in one of my js files I'm using const in "strict mode" . When trying to run it, I'm getting an error:
...
Salting Your Password: Best Practices?
...
Prefix or suffix is irrelevant, it's only about adding some entropy and length to the password.
You should consider those three things:
The salt has to be different for every password you store. (This is quite a common misunderstanding.)
Use a cryptographically secure random number generat...