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what is the difference between ?:, ?! and ?= in regex?
...om the lookahead must be discarded, so the engine steps back from i in the string to u. The lookahead was successful, so the engine continues with i. But i cannot match u. So this match attempt fails.
Let's apply q(?=u)u to quit. The lookahead is positive and is followed by another token. Again, q...
How to create a listbox in HTML without allowing multiple selection?
...m looking to create a simple listbox, but one of the requirements is to DISALLOW multiple selection. Most of the code for listboxes goes like this -
...
Proper way to initialize a C# dictionary with values?
....NET 4.0 console application:
static class Program
{
static void Main(string[] args)
{
var myDict = new Dictionary<string, string>
{
{ "key1", "value1" },
{ "key2", "value2" }
};
Console.ReadKey();
}
}
Can you try to repro...
C# DropDownList with a Dictionary as DataSource
...eField of DropDownList using "Key" and "Value" texts :
Dictionary<string, string> list = new Dictionary<string, string>();
list.Add("item 1", "Item 1");
list.Add("item 2", "Item 2");
list.Add("item 3", "Item 3");
list.Add("item 4", "Item 4");
ddl.DataSource = l...
Remove sensitive files and their commits from Git history
... (1MB by default) in your repo's history will be scanned, and any matching string (that isn't in your latest commit) will be replaced with the string "***REMOVED***". You can then use git gc to clean away the dead data:
$ git gc --prune=now --aggressive
The BFG is typically 10-50x faster than runni...
How can a Java variable be different from itself?
...rt demo:
class Test {
static int x = 0;
public static void main(String[] args) throws Exception {
Thread t = new Thread(new Change());
t.setDaemon(true);
t.start();
while (true) {
if (x == x) {
System.out.println("Ok");
...
Better way of incrementing build number?
...about pane and other places, you can also look into setting CFBundleGetInfoString and CFBundleShortVersionString.
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A regular expression to exclude a word/string
...e.aspx?id=$1&$3 Will this rule work correctly and propagate the query string too? So if someone visits mydomain.com/hello?abc=123 I'd like it to rewrite to mydomain.com/Profile.aspx?id=hello&abc=123 I'm also a bit unsure about the performance of (.+) at the end to capture the querystring i...
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
...
let label = "The width is "
let width = 94
let widthLabel = label + String(width)
Note
练习
尝试删除最后一行的String转换，你会得到什么错误？
还有更简单的方法来在字符串中包含值：以小括号来写值，并用反斜线("")放在小括号之前...
Oracle SQL escape character (for a '&')
...s gets the job done, but is a little clunky when dealing with pre-existing strings.
– aglassman
Sep 5 '13 at 14:43
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