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创建自定义 TinyWebDB 服务 · App Inventor 2 中文网
...nyWebDB can be used to facilitate communication between phones and apps (e.g., multi-player games).
By default, the TinyWebDB component stores data on a test service provided by App Inventor, http://tinywebdb.appinventor.mit.edu/ . This service is helpful for testing, but it is shared by all App In...
List columns with indexes in PostgreSQL
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Create some test data...
create table test (a int, b int, c int, constraint pk_test primary key(a, b));
create table test2 (a int, b int, c int, constraint uk_test2 unique (b, c));
create table test3 (a int, b int, c int, constraint uk_test3b unique (b), cons...
Parse JSON in C#
...ON data from the Google AJAX Search API. I have this URL and I'd like to break it down so that the results are displayed. I've currently written this code, but I'm pretty lost in regards of what to do next, although there are a number of examples out there with simplified JSON strings.
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How to find the JVM version from a program?
...u need.
You can also use JMX if you want:
ManagementFactory.getRuntimeMXBean().getVmVersion()
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How do I turn a python datetime into a string, with readable format date?
...on docs documents the different formats it accepts:
Python 2: strftime() Behavior
Python 3: strftime() Behavior
For this specific example, it would look something like:
my_datetime.strftime("%B %d, %Y")
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Converting a list to a set changes element order
...onverting a list to set the order of elements is changed and is sorted by character.
11 Answers
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What causes and what are the differences between NoClassDefFoundError and ClassNotFoundException?
What is the difference between NoClassDefFoundError and ClassNotFoundException ?
15 Answers
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PHP Redirect with POST data
... this topic, and there are some experts who have said that it is not possible , so I would like to ask for an alternative solution.
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How to make a Java class that implements one interface with two generic types?
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Consider encapsulation:
public class TwoTypesConsumer {
private TomatoConsumer tomatoConsumer = new TomatoConsumer();
private AppleConsumer appleConsumer = new AppleConsumer();
public void consume(Tomato t) {
tomatoConsumer.consu...
A weighted version of random.choice
...hted version of random.choice (each element in the list has a different probability for being selected). This is what I came up with:
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