大约有 40,000 项符合查询结果（耗时：0.0547秒） [XML]
How to convert a string to lower case in Bash?
...:
POSIX standard
tr
$ echo "$a" | tr '[:upper:]' '[:lower:]'
hi all
AWK
$ echo "$a" | awk '{print tolower($0)}'
hi all
Non-POSIX
You may run into portability issues with the following examples:
Bash 4.0
$ echo "${a,,}"
hi all
sed
$ echo "$a" | sed -e 's/\(.*\)/\L\1/'
hi all
# this also...
Copy text to clipboard with iOS
...
Although the accepted answer is a good walkthrough of how UIPasteboard works, I figured I'd post the relevant snippet right here for everyone's convenience:
Obj-C
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
pasteboard.string = @"Paste me!";
Swift 2....
Android studio - Failed to find target android-18
...
I think you might not have the Android-18 sdk installed. Go to Tools > Android > SDK Manager and check to see if Android 4.3 (API 18) is installed.
s...
What's the difference between ng-model and ng-bind
...
ToshTosh
35.4k1111 gold badges6262 silver badges5353 bronze badges
...
What is the difference between const int*, const int * const, and int const *?
...
Read it backwards (as driven by Clockwise/Spiral Rule):
int* - pointer to int
int const * - pointer to const int
int * const - const pointer to int
int const * const - const pointer to const int
Now the first const can be on either ...
Getting reference to the top-most view/window in iOS application
I'm creating a reusable framework for displaying notifications in an iOS application. I'd like the notification views to be added over the top of everything else in the application, sort of like a UIAlertView. When I init the manager that listens for NSNotification events and adds views in response,...
Don't understand why UnboundLocalError occurs (closure) [duplicate]
...iable is considered local.[1] Thus, the line
counter += 1
implicitly makes counter local to increment(). Trying to execute this line, though, will try to read the value of the local variable counter before it is assigned, resulting in an UnboundLocalError.[2]
If counter is a global variable, t...
Find out time it took for a python script to complete execution
...
Petar IvanovPetar Ivanov
80.8k77 gold badges7272 silver badges8787 bronze badges
...
Getting full URL of action in ASP.NET MVC [duplicate]
...
There is an overload of Url.Action that takes your desired protocol (e.g. http, https) as an argument - if you specify this, you get a fully qualified URL.
Here's an example that uses the protocol of the current request in an action method:
var fullUrl = this.Url.A...
Is it possible to have nested templates in Go using the standard library?
How do I get nested templates like Jinja has in the python runtime. TBC what I mean is how do I have a bunch of templates inherit from a base templates, just filing in blocks of the base templates, like Jinja/django-templates does. Is it possible using just html/template in the standard library.
...