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Is it a good practice to use try-except-else in Python?
...ns inherent in some of the "look-before-you-leap" constructs. For example, testing os.path.exists results in information that may be out-of-date by the time you use it. Likewise, Queue.full returns information that may be stale. The try-except-else style will produce more reliable code in these ca...
When to use static vs instantiated classes
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One thing about static methods/classes is that they don't facilitate unit testing (at least in PHP, but probably in other languages too).
Another thing about static data is that only one instance of it exists in your program : if you set MyClass::$myData to some value somewhere, it'll have this va...
What is the difference between --save and --save-dev?
...ave-dev is used to save the package for development purpose.
Example: unit tests, minification..
--save is used to save the
package required for the application to run.
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HTML5 Canvas vs. SVG vs. div
...t the benefits of each, but I will give some of the relevant results of my tests to consider for your specific application:
I made Canvas and HTML DIV test pages, both had movable "nodes." Canvas nodes were objects I created and kept track of in Javascript. HTML nodes were movable Divs.
I added 10...
Generating random strings with T-SQL
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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...
How to write a:hover in inline CSS?
...t link, and I really wish it worked, sadly it does not. Just to confirm, I tested using the syntax style="{color:green;} :hover { color: red; }" and firefox managed to color the link green, but ignored the hover. Chrome ignored both. Continued testing would be pretty pointless.
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Static linking vs dynamic linking
...n how well it works.
The way to answer performance questions is always by testing (and use a test environment as much like the deployment environment as possible).
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各编程语言读写文件汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
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// 写文件
using (StreamWriter sw = new StreamWriter(@"test.txt"))
{
sw.WriteLine("file content...");
sw.Flush();
sw.Close();
}
// 读文件
using (TextReader reader = new StreamReader("test.txt"))
{
while (reader.P...
Handling Dialogs in WPF with MVVM
...It is OK for a ViewModel to call a dialog directly. However, when you are testing a ViewModel , that means that the dialog will either pop up during your test, or fail all together (never really tried this).
So, what needs to happen is while testing is to use a "test" version of your dialog. Th...
How to upper case every first letter of word in a string? [duplicate]
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String wordStr = WordUtils.capitalize("this is first WORD capital test.");
//Capitalize method capitalizes only first character of a String
System.out.println("wordStr= " + wordStr);
wordStr = WordUtils.capitalizeFully("this is first WORD capital test.");
//...