大约有 32,000 项符合查询结果（耗时：0.0483秒） [XML]
What does “hashable” mean in Python?
...g to the members or values of the instance.
For example, that value could then be used as a key in a dict as below:
>>> tuple_a = (1,2,3)
>>> tuple_a.__hash__()
2528502973977326415
>>> tuple_b = (2,3,4)
>>> tuple_b.__hash__()
3789705017596477050
>>> tup...
Detect if an input has text in it using CSS — on a page I am visiting and do not control?
...ML code can be modified. If you add the required attribute to the element, then the element will match :invalid or :valid according to whether the value of the control is empty or not. If the element has no value attribute (or it has value=""), the value of the control is initially empty and becomes...
How can I negate the return-value of a process?
...example.
$ if ! some-command < input.txt | grep Success > /dev/null; then echo 'Failure!'; recover-command; mv input.txt input-failed.txt; fi
Failure!
$ ls *.txt
input-failed.txt
Portable answer — works with antique shells
In a Bourne (Korn, POSIX, Bash) script, I use:
if ...command and ...
Container-fluid vs .container
...in-width of 992px, your .container element will have a width of 970px. You then slowly widen your browser window. The width of your .container won't change until you get to 1200px, at which it will jump to 1170px wide and stay that way for any larger browser widths.
Your .container-fluid element, o...
How to implement Enums in Ruby?
... value that is important. Just declare a module to hold your constants and then declare the constants within that.
module Foo
BAR = 1
BAZ = 2
BIZ = 4
end
flags = Foo::BAR | Foo::BAZ # flags = 3
share
|
...
What are Bearer Tokens and token_type in OAuth 2?
...ossession).
The Bearer Token or Refresh token is created for you by the Authentication server. When a user authenticates your application (client) the authentication server then goes and generates for your a Bearer Token (refresh token) which you can then use to get an access token.
The Bearer Toke...
How do I merge a specific commit from one branch into another in Git?
...
If BranchA has not been pushed to a remote then you can reorder the commits using rebase and then simply merge. It's preferable to use merge over rebase when possible because it doesn't create duplicate commits.
git checkout BranchA
git rebase -i HEAD~113
... reorder...
How to handle command-line arguments in PowerShell
...have parameters starting with -, like script.ps1 -server http://devserver
Then you handle them in param section in the beginning of the file.
You can also assign default values to your params, read them from console if not available or stop script execution:
param (
[string]$server = "http:/...
Convert form data to JavaScript object with jQuery
...at, I've added a new param keyMap and the following line: key = if keyMap? then keyMap(@name) else @name. Now you can pass mapping function like (name) -> name.match(/\[([^\]]+)]/)[1]. And then one would need to change all subsequent @name to key, of course
– Damir Zekić
...
How do I install imagemagick with homebrew?
...r me was doing the following:
cd /usr/local
git reset --hard FETCH_HEAD
Then I retried brew install imagemagick and it correctly pulled the package from the new mirror, instead of adamv.
If that does not work, ensure that /Library/Caches/Homebrew does not contain any imagemagick files or folders...