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How to pass a function as a parameter in Java? [duplicate]
...s a simple example, where foo() is the function passed as a parameter, and demo() is the function that takes a function as a parameter. void demo(final Callable<Void> func){ func.call(); } void foo(){ return null; } demo(new Callable<Void>() {public Void call() {return foo...
Is it possible to set the equivalent of a src attribute of an img tag in CSS?
...
Use content:url("image.jpg").
Full working solution (Live Demo):
<!doctype html>
<style>
.MyClass123{
content:url("http://imgur.com/SZ8Cm.jpg");
}
</style>
<img class="MyClass123"/>
Tested and working:
Chrome 14.0.835.163
Safari 4.0....
Manually raising (throwing) an exception in Python
... Python!') # Don't! If you catch, likely to hide bugs.
For example:
def demo_bad_catch():
try:
raise ValueError('Represents a hidden bug, do not catch this')
raise Exception('This is the exception you expect to handle')
except Exception as error:
print('Caught this...
Making a request to a RESTful API using python
...
Using requests:
import requests
url = 'http://ES_search_demo.com/document/record/_search?pretty=true'
data = '''{
"query": {
"bool": {
"must": [
{
"text": {
"record.document": "SOME_JOURNAL"
}
},
{
"text...
求助！关于拓展模块NotificationStyle的demo运行时报错的问题 - App Invent...
我使用的是demo程序进行测试，拓展程序链接：
https://www.fun123.cn/reference/extensions/NotificationStyle.html
结果无论点什么按键都会报错：
edu.mit.appinventor.aicompanion3: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be...
PostgreSQL create table if not exists
... */ sch.foo (
id serial NOT NULL,
demo_column varchar NOT NULL,
demo_column2 varchar NOT NULL,
CONSTRAINT pk_sch_foo PRIMARY KEY (id));
CREATE INDEX /* IF NOT EXISTS add for PostgreSQL 9.5+ */ idx_sc...
Detect & Record Audio in Python
...:
print("please speak a word into the microphone")
record_to_file('demo.wav')
print("done - result written to demo.wav")
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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...ing App Inventor extensions to implement multitouch: Rotation detector
A demo app with rotation detector extension component
How to build rotation detector extension
App Inventor does not have multitouch capabilities built in. Adding multitouch is a popular request, and MIT App Inventor might e...
How do you split a list into evenly sized chunks?
...:
it = iter(it)
return iter(lambda: tuple(islice(it, size)), ())
Demo:
>>> list(chunk(range(14), 3))
[(0, 1, 2), (3, 4, 5), (6, 7, 8), (9, 10, 11), (12, 13)]
This works with any iterable and produces output lazily. It returns tuples rather than iterators, but I think it has a c...
How to open, read, and write from serial port in C?
...
For demo code that conforms to POSIX standard as described in Setting Terminal Modes Properly
and Serial Programming Guide for POSIX Operating Systems, the following is offered.
This code should execute correctly using Linux on x...