大约有 33,000 项符合查询结果（耗时：0.0452秒） [XML]
Why would someone use WHERE 1=1 AND in a SQL clause?
Why would someone use WHERE 1=1 AND <conditions> in a SQL clause (Either SQL obtained through concatenated strings, either view definition)
...
What does “coalgebra” mean in the context of programming?
...on of these structures which is pretty much incomprehensible to me. Can anyone please explain what coalgebras mean in the context of programming, what is their significance, and how they relate to objects and comonads?
...
How does password salt help against a rainbow table attack?
..., and makes it infeasible to use a rainbow table.
To understand the first one, imagine a single password file that contains hundreds of usernames and passwords. Without a salt, I could compute "md5(attempt[0])", and then scan through the file to see if that hash shows up anywhere. If salts are pres...
Which is a better way to check if an array has more than one element?
I just need to check if an array has more than one element.
I am trying to do it this way :
11 Answers
...
What is a race condition?
When writing multithreaded applications, one of the most common problems experienced is race conditions.
18 Answers
...
What are the differences between Perl, Python, AWK and sed? [closed]
...tended Regular Expressions). The language for the actions is similar to C. One of the key features of awk is that it splits the input automatically into records and each record into fields.
Perl was written in part as an awk-killer and sed-killer. Two of the programs provided with it are a2p and s2...
Visual Studio warning: “Some of the properties associated with the solution could not be read”
When I open my solution, I get a dialog with this warning. The solution (one web app, one class project) builds without errors.
...
Is it possible to define more than one function per file in MATLAB, and access them from outside tha
...LAB required each function to be defined in its own file, even if it was a one-liner.
9 Answers
...
REST URI convention - Singular or plural name of resource while creating it
...le and APIs out there take is keeping it plural at all times. Ids specify ONE resource cars/id
– PositiveGuy
Aug 31 '15 at 13:54
216
...
Xcode: What is a target and scheme in plain language?
...
I've added in Workspace and Project too!
Workspace - Contains one or more projects. These projects usually relate to one another
Project - Contains code and resources, etc. (You'll be used to these!)
Target - Each project has one or more targets.
Each target defines a list of build ...