A php regular expression that validates email with “comments” as seen on gmail (address+comment@gmail.com)
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preg_match("/^([a-zA-Z0-9])+(\.[a-zA-Z0-9_-]+)*(\+[a-zA-Z0-9\._-]+)?@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-]+)*\.([a-zA-Z]{2,4})$/", $email) |
Execute in Windows PowerShell
$client = new-object System.Net.WebClient
$client.DownloadFile("http://www.xyz.net/file.txt","C:\tmp\file.txt")
Thanks to superuser !
Want to capture double click events on ListViewItems instead of the entire ListView ? Here is a quick trick :
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var originalSource = (DependencyObject)e.OriginalSource;
while ((originalSource != null) && !(originalSource is System.Windows.Controls.ListBoxItem))
{
originalSource = VisualTreeHelper.GetParent(originalSource);
}
if (originalSource == null)
return; |
If your ever need to serialize a generic KeyValuePair
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[Serializable]
public struct SerializableKeyValuePair<TKey, TValue>
{
public TKey Key { get; set; }
public TValue Value { get; set; }
public SerializableKeyValuePair(TKey key, TValue value) : this()
{
Key = key;
Value = value;
}
} |
Not too hard, is it?
While debugging, I like to watch my log file as it gets filled in just like the linux command tail -f does. In a few C# lines, we are able to “watch” a file and print the changes to the console as they are made :
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public static void StartReading(string path)
{
s_file = path;
s_watcher = new FileSystemWatcher();
s_watcher.Path = Path.GetDirectoryName(path);
s_watcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;
s_watcher.Filter = "*.txt";
s_watcher.Created += OnChanged;
s_watcher.Changed += OnChanged;
s_watcher.EnableRaisingEvents = true;
} |
Then all you need to do is print the differences each time the event is raised.
I added some content! Check it out!