大约有 16,000 项符合查询结果（耗时：0.0630秒） [XML]
React JSX: selecting “selected” on selected option
...t component for a <select> menu, I need to set the selected attribute on the option that reflects the application state.
...
What does “javascript:void(0)” mean?
...
The void operator evaluates the given
expression and then returns undefined.
The void operator is often used merely
to obtain the undefined primitive
value, usually using “void(0)” (which
is equivalent to “void 0”). In these
cases, th...
this.setState isn't merging states as I would expect
...
var newSelected = _.extend({}, this.state.selected);
newSelected.name = 'Barfoo';
this.setState({ selected: newSelected });
I've used function _.extend() function (from underscore.js library) here to prevent modification to the existing selected part of the state by creating a shallow copy of it...
Get current batchfile directory
...the path of the caller of the batch, not the batch file location.
You can get the name of the batch script itself as typed by the user with %0 (e.g. scripts\mybatch.bat). Parameter extensions can be applied to this so %~dp0 will return the Drive and Path to the batch script (e.g. W:\scripts\) and %...
Understanding ibeacon distancing
Trying to grasp a basic concept of how distancing with ibeacon (beacon/ Bluetooth-lowenergy/BLE) can work. Is there any true documentation on how far exactly an ibeacon can measure. Lets say I am 300 feet away...is it possible for an ibeacon to detect this?
...
程序员才能听得懂的笑话 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
...妻——不过有一只会说话的青蛙还是挺酷的。”
6、Keyboard not found ... press F1 to continue
7、Unix是用户友好的，只是要成为Unix的用户很困难。
8、一百万只猴子，给他们一百万个键盘，其中的一个会写出Java程序，其它的写的...
JavaScript for…in vs for
Do you think there is a big difference in for...in and for loops? What kind of "for" do you prefer to use and why?
23 Answe...
Real-world applications of zygohistomorphic prepromorphisms
...egment sums). Zygomorphisms are seemingly a good fit for sliding window problems once you are accustomed to them.
http://www.iis.sinica.edu.tw/~scm/2010/functional-pearl-maximally-dense-segments/
I'd nominate the authors for extra credit as they've avoided the use of the fixed-point Mu functor.
...
Google Play app description formatting
I've made an Android application that is available on Google Play. Now I want to add some more formatting to my app description (eg. indent, links, lists..). But I cannot find any website where possible formatting is listed. Google Help pages cannot help me either on this subject. There exists a lot...
Saving and Reading Bitmaps/Images from Internal memory in Android
...
Use the below code to save the image to internal directory.
private String saveToInternalStorage(Bitmap bitmapImage){
ContextWrapper cw = new ContextWrapper(getApplicationContext());
// path to /data/data/yourapp/ap...