大约有 42,000 项符合查询结果（耗时：0.0386秒） [XML]
Determining whether jQuery has not found any element
...more clearance, you can also use if (!!$('#id').length), that do a boolean cast.
– Daniele Vrut
Aug 2 '14 at 21:58
6
...
How do you get the logical xor of two variables in Python?
...!= bool(b) != bool(c) to be the same as bool(a) ^ bool(b) ^ bool(c). So do casts to bool, but I would recommend ^. To know what's going up in the first example look up "operator chaining".
– elmo
Jul 25 '12 at 11:50
...
How to replace all occurrences of a character in string?
...td::string::replace() instead of std::replace()! 'x' (char) is implicitely casted to size_t [value 120], thus the whole string or or part of it will be filled up with 120 copies of 'y'.
– IBue
Feb 19 '15 at 18:41
...
How do I access this object property with an illegal name?
...Very late response, with PHP > 5.5, there are better solutions. Either cast the object to an array, or try get_object_vars().
– Owen Beresford
Apr 9 '16 at 10:34
1
...
Installing Apple's Network Link Conditioner Tool
...nu item:
Xcode > Open Developer Tool > More Developer Tools...
and get "Hardware IO Tools for Xcode".
For Xcode 8+, get "Additional Tools for Xcode [version]".
Double-click on a .prefPane file to install. If you already have an older .prefPane installed, you'll need to remove it from /...
How do I get the filepath for a class in Python?
...
This is the wrong approach for Django and really forcing things.
The typical Django app pattern is:
/project
/appname
models.py
views.py
/templates
index.html
etc.
share
...
Parcelable where/when is describeContents() used?
... human readable form? :-)
It seems like C++ programmer designed Parceable and at some point he realized: Oh, damn, there is no multiple inheritance in Java... :-)
share
|
improve this answer
...
Key hash for Android-Facebook app
I'm working on an Android app, in which I want to integrate a Facebook
posting feature. I downloaded the Facebook-Android SDK, and I got
the readme.md (text file) in there, in which it is mentioned to generate
the key hash for Android. How do I generate it?
...
Difference between WAIT and BLOCKED thread states
What is the difference between thread state WAIT and thread state BLOCKED?
6 Answers
6...
How to handle floats and decimal separators with html5 input type number
...y used in regions where decimal separator is comma, not dot, so I need to handle both decimal separators.
10 Answers
...