大约有 49,000 项符合查询结果（耗时：0.0668秒） [XML]
Eloquent Collection: Counting and Detect Empty
This may be a trivial question but I am wondering if Laravel recommends a certain way to check whether an Eloquent collection returned from $result = Model::where(...)->get() is empty, as well as counting the number of elements.
...
Getting the thread ID from a thread
...
ManagedThreadId is not a robust approach to identify threads as the ManagedThreadId property id's get reused by your app. So it is not a reliable identifier for threads in some scenarios and you will experience the exception : "An item with the same key has already been add...
Can a program depend on a library during compilation but not runtime?
I understand the difference between runtime and compile-time and how to differentiate between the two, but I just don't see the need to make a distinction between compile-time and runtime dependencies .
...
Copy to clipboard in Node.js?
...t of whatever window system the operating system happens to be running. So if you wanted this to work on X for example, you would need bindings to Xlib and/or XCB. Xlib bindings for node actually exist: https://github.com/mixu/nwm. Although I'm not sure whether it gives you access to the X clipboard...
When to use enumerateObjectsUsingBlock vs. for
Besides the obvious differences:
6 Answers
6
...
Get list of a class' instance methods
...
This is great way to test if a class has polymorphed methods from a pseudo-Interface/Abstract base class without having to try and call the methods directly.
– Daniel Doezema
Apr 19 '13 at 13:03
...
Import file size limit in PHPMyAdmin
...
You probably didn't restart your server ;)
Or you modified the wrong php.ini.
Or you actually managed to do both ^^
share
|
improve this answer
|
follo...
How do I request a file but not save it with Wget? [closed]
...- $url &> /dev/null
> redirects application output (to a file). if > is preceded by ampersand, shell redirects all outputs (error and normal) to the file right of >. If you don't specify ampersand, then only normal output is redirected.
./app &> file # redirect error and st...
What's the best way to unit test protected & private methods in Ruby?
...
There's public_send (documentation here) if you want to respect privacy. I think that's new to Ruby 1.9.
– Andrew Grimm
Jan 5 '11 at 22:39
...
How to recursively delete an entire directory with PowerShell 2.0?
... or folder is actually removed, causing trouble sometimes." --> For clarification: the parent folder will not be deleted and one gets the following error: "[parent folder] cannot be removed because it is not empty." I see this happen constantly on (slow) networked drives. The only solution is the...