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Swift 编程语言入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... return "A square with sides of length \(sideLength)."
}
}
let test = Square(sideLength: 5.2, name: "my test square")
test.area()
test.simpleDescription()
Note
练习
编写另一个 NamedShape 的子类叫做 Circle ，接受半径和名字到其构造器。实现 area 和 desc...
Selenium WebDriver: Wait for complex page with JavaScript to load
I have a web application to test with Selenium. There is a lot of JavaScript running on page load.
This JavaScript code is not so well written but I can't change anything.
So waiting for an element to appear in the DOM with findElement() method is not an option.
I want to create a generic func...
Getting error while sending email through Gmail SMTP - “Please log in via your web browser and then
...the
letters in the distorted picture.
Your app might not support the latest security standards. Try changing a few settings to allow less secure apps access to your
account.
Make sure your mail app isn't set to check for new email too often. If your mail app checks for new messages mo...
How to capture stdout output from a Python function call?
...tringIO() with redirect_stdout(f): logger = getLogger('test_logger') logger.debug('Test debug message') out = f.getvalue() self.assertEqual(out, 'DEBUG:test_logger:Test debug message') . It gives me an error: AssertionError: '' != 'Test debug message'...
Synchronise ScrollView scroll positions - android
...l have to do that for ourselves.
First we need an interface.
package com.test;
public interface ScrollViewListener {
void onScrollChanged(ObservableScrollView scrollView, int x, int y, int oldx, int oldy);
}
Then we need to override the ScrollView class, to provide the ScrollViewListener ...
“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP
...alse';
echo ' ' . (empty($v) ? 'true' : 'false');
echo "\n";
});
Test the above snippet in the 3v4l.org online PHP editor
Although PHP does not require a variable declaration, it does recommend it in order to avoid some security vulnerabilities or bugs where one would forget to give a val...
On design patterns: When should I use the singleton?
... A print spooler does not meet the criteria. You may want a test print spooler that doesn't actually print, for testing.
– user253751
Jul 1 at 15:09
add a comme...
Inserting HTML into a div
... can use insertAdjacentHTML - however I dig into and make some performance tests - (2019.09.13 Friday) MacOs High Sierra 10.13.6 on Chrome 76.0.3809 (64-bit), Safari 12.1.2 (13604.5.6), Firefox 69.0.0 (64-bit) ). The test F is only for reference - it is out of the question scope because we need to i...
TypeError: Missing 1 required positional argument: 'self'
...here.
Use
p = Pump()
p.getPumps()
Small example -
>>> class TestClass:
def __init__(self):
print("in init")
def testFunc(self):
print("in Test Func")
>>> testInstance = TestClass()
in init
>>> testInstance.testFunc()
in Test ...
Generating random strings with T-SQL
...
When generating random data, specially for test, it is very useful to make the data random, but reproducible. The secret is to use explicit seeds for the random function, so that when the test is run again with the same seed, it produces again exactly the same strings...