HAProxy doesn’t start, can not bind UNIX socket [/run/haproxy/admin.sock]
Haproxy needs to write to /run/haproxy/admin.sock but it wont create the directory for you. Create the directory /run/haproxy/ first or set stats socket to a different path.
bind
How to bind DataTemplate datatype to interface?
You can bind to interfaces by telling wpf explicitly that you are binding to an interface field: (Please note that ViewModelBase is simply a base-class that implements the INotifyPropertyChanged interface) public class Implementation : ViewModelBase, IInterface { private string textField; public string TextField { get { return textField; } set { if (value == textField) … Read more
(ubuntu) nginx: [emerg] bind() to 0.0.0.0:80 failed (13: permission denied)
the socket API bind() to a port less than 1024, such as 80 as your title mentioned, need root access. here is “Bind to ports less than 1024 without root access” and another easier way is to run nginx as root.
dig returns SERVFAIL but +trace works
dig +trace follows the whole chain from the beginning – it queries root servers, then .info servers then your namservers. Thus it avoids any caching resolvers, and also avoids propagation issues. dig +notrace (the default) queries your default DNS resolver (on Linux, whatever specified in /etc/resolv.conf). There’s some problem with that resolver – maybe it’s … Read more
JQuery event model and preventing duplicate handlers
Prevent duplicate binding using jQuery’s event namespace There are actually a couple different ways of preventing duplicate. One is just passing the original handler in the unbind, BUT if it is a copy and not in the same space in memory it will not unbind, the other popular way (using namespaces) is a more certain … Read more
When should I use std::bind?
Here’s something you can’t do with a lambda: std::unique_ptr<SomeType> ptr = …; return std::bind(&SomeType::Function, std::move(ptr), _1, _2); Lambdas can’t capture move-only types; they can only capture values by copy or by lvalue reference. Though admittedly this is a temporary issue that’s being actively resolved for C++14 😉 “Simpler and clearer” is a matter of opinion. … Read more
SQLite: bind list of values to “WHERE col IN ( :PRM )”
You can dynamically build a parameterized SQL statement of the form SELECT * FROM TABLE WHERE col IN (?, ?, ?) and then call sqlite_bind_int once for each “?” you added to the statement. There is no way to directly bind a text parameter to multiple integer (or, for that matter, multiple text) parameters. Here’s … Read more
Remove focus programmatically?
This might help… http://api.jquery.com/blur/ $(‘#tabName’).blur();
How to bind an unbound method without calling it?
All functions are also descriptors, so you can bind them by calling their __get__ method: bound_handler = handler.__get__(self, MyWidget) Here’s R. Hettinger’s excellent guide to descriptors. As a self-contained example pulled from Keith’s comment: def bind(instance, func, as_name=None): “”” Bind the function *func* to *instance*, with either provided name *as_name* or the existing name of … Read more