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C#/Linq: Apply a mapping function to each element in an IEnumerable?
...int> integers = new List<int>() { 1, 2, 3, 4, 5 };
IEnumerable<string> strings = integers.Select(i => i.ToString());
Or in LINQ syntax:
IEnumerable<int> integers = new List<int>() { 1, 2, 3, 4, 5 };
var strings = from i in integers
select i.ToString();...
Pipe subprocess standard output to a variable [duplicate]
...ll which can be dangerous if you don't control the contents of the command string.
>>> proc = subprocess.Popen(['cdrecord', '--help'], stderr=subprocess.PIPE)
>>> output = proc.stderr.read()
>>> print output
Usage: wodim [options] track1...trackn
Options:
-version ...
How to get just numeric part of CSS property with jQuery?
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This will clean up all non-digits, non-dots, and not-minus-sign from the string:
$(this).css('marginBottom').replace(/[^-\d\.]/g, '');
UPDATED for negative values
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How can I add some small utility functions to my AngularJS application?
...d @Amogh Talpallikar. Especially if you're looking for utilities like isNotString() or similar. One of the clear advantages here is that you can re-use them outside of your angular code and you can use them inside of your config function (which you can't do with services).
That being said, if you'r...
Example of Named Pipes
...ace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
StartServer();
Task.Delay(1000).Wait();
//Client
var client = new NamedPipeClientStream("PipesOfPiece");
client.Connect();
Str...
Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...下面一些例子来说明这个问题：
如果你需要返回一个String对象，并且你知道它最终会需要连接到一个StringBuffer，请修改你的实现方式，避免直接进行连接操作，应该采用创建一个临时对象来做这个操作。
当从输入的数据集中...
Programmatically change log level in Log4j2
...er names from the loggers themselves rather than hard coding the name as a string.
– DWoldrich
Oct 29 '19 at 18:45
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Block Comments in Clojure
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Double quotes (string literal) allow adding arbitrary text (not only proper S-forms):
(comment "
public class HelloWorld {
public static void main(String[] args) {
System.out.print("Hello, World");
System.out.println()...
Formatting numbers (decimal places, thousands separators, etc) with CSS
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You can use Number.prototype.toLocaleString(). It can also format for other number formats, e.g. latin, arabic, etc.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString
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More elegant way of declaring multiple variables at the same time
...a list of flag values (True, False) mapped to flag names (single-character strings). You then transform this data definition into an inverted dictionary which maps flag names to flag values. This can be done quite succinctly with a nested list comprehension, but here's a very readable implementati...