大约有 47,800 项符合查询结果（耗时：0.0697秒） [XML]
django MultiValueDictKeyError error, how do I deal with it
...
Use the MultiValueDict's get method. This is also present on standard dicts and is a way to fetch a value while providing a default if it does not exist.
is_private = request.POST.get('is_private', False)
Generally,
my_var = dict.get(<key>, <default>)
...
What is the minimum length of a valid international phone number?
...ode) is 7 digits. - Official Source (country code 46)
For Solomon Islands its 5 for fixed line phones. - Source (country code 677)
... and so on.
So including country code, the minimum length is 9 digits for Sweden and 11 for Israel and 8 for Solomon Islands.
Edit (Clean Solution): Actually...
NSRange to Range
...o one simple solution is to convert String to NSString first. The delegate and replacement method names are slightly different in Swift 3 and 2, so depending on which Swift you're using:
Swift 3.0
func textField(_ textField: UITextField,
shouldChangeCharactersIn range: NSRange,
...
Check if PHP session has already started
...a PHP file that is sometimes called from a page that has started a session and sometimes from a page that doesn't have session started. Therefore when I have session_start() on this script I sometimes get the error message for "session already started". For that I've put these lines:
...
Static fields on a null reference in Java
...ase, Primary = main.getNull():
The Primary expression is evaluated, and the result is discarded. [...]
If the field is a non-blank final field, then the result is the value of the specified class variable in the class or interface that is the type of the Primary expression. [...]
...
How can I install MacVim on OS X?
...vim
Step 4. Run brew link macvim
You now have the latest versions of vim and macvim managed by brew. Run brew update && brew upgrade every once in a while to upgrade them.
This includes the installation of the CLI mvim and the mac application (which both point to the same thing).
I use t...
Merge changes from remote github repository to your local repository
I have forked a repository on github some time ago, made a small change and pushed the change back to my github fork. The original repository has changed since. I would like to merge the changes from the original repository to my fork.
...
Rails 3: “field-with-errors” wrapper changes the page appearance. How to avoid this?
...
One little question: Why both the label and the input are wrapped ? How Rails decide what to wrap ?
– Misha Moroshko
Mar 11 '11 at 2:03
...
Get a list of all threads currently running in Java
...de worse for the sake of efficiency. If you have an efficiency requirement and an infrastructure to measure efficiency quantitatively, then I'm ok with people making code worse, because they seem to know what they're doing. See the root of all evil according to Donald Knuth.
– ...
In tmux can I resize a pane to an absolute value
...
The -x and -y options for resize-pane were introduced in tmux 1.8.
– Chris Johnsen
Apr 23 '13 at 6:10
...