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How to make a class JSON serializable
...gt;>> magic(f)
'{"fname": "/foo/bar"}'
In that case you can merely call json.dumps(f.__dict__).
If you want more customized output then you will have to subclass JSONEncoder and implement your own custom serialization.
For a trivial example, see below.
>>> from json import JSON...
How to Delete using INNER JOIN with SQL Server?
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@bluefeet could you provide the right syntax for SQL Server for deleting from both tables?
– oabarca
May 21 '14 at 14:43
47
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Optional Parameters with C++ Macros
...Hello, World!", 18, bold);
return 0;
}
This makes it easier for the caller of the macro, but not the writer.
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Is std::vector so much slower than plain arrays?
...are not only allocating the memory but also running through the vector and calling the constructor on each member.
Re-Arranging the code slightly so that the vector only initializes each object once:
std::vector<Pixel> pixels(dimensions * dimensions, Pixel(255,0,0));
Now doing the same t...
What does the exclamation mark do before the function?
...end: !function foo() {}() which has higher precedence than ! and instantly calls the function.
So what the author is doing is saving a byte per function expression; a more readable way of writing it would be this:
(function(){})();
Lastly, ! makes the expression return true. This is because by d...
How to unsubscribe to a broadcast event in angularJS. How to remove function registered via $on
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You need to store the returned function and call it to unsubscribe from the event.
var deregisterListener = $scope.$on("onViewUpdated", callMe);
deregisterListener (); // this will deregister that listener
This is found in the source code :) at least in 1.0.4. I'll ...
IE7 does not understand display: inline-block
...gger inline-block behaviour in IE7, so we are happy.
This CSS will not validate, and can make your stylesheet messed up anyways, so using an IE7-only stylesheet through conditional comments could be a good idea.
<!–-[if IE 7]>
<link rel="stylesheet" href="ie7.css" type="text/css" />
...
Is it possible to override JavaScript's toString() function to provide meaningful output for debuggi
...tion overriding the prototype toString property, Object.prototype.toString.call(f) will still display [object Object].
– Frederik Krautwald
May 12 '15 at 20:59
16
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Express-js wildcard routing to cover everything under and including a path
...r more characters.
https://github.com/senchalabs/connect/blob/master/lib/middleware/router.js
If you have 2 routes that perform the same action you can do the following to keep it DRY.
var express = require("express"),
app = express.createServer();
function fooRoute(req, res, next) {
res.e...
If strings are immutable in .NET, then why does Substring take O(n) time?
...ct tiny substrings from tiny strings, so how the complexity grows asymptotically is completely irrelevant.
The long answer is:
An immutable data structure built such that operations on an instance permit re-use of the memory of the original with only a small amount (typically O(1) or O(lg n)) of c...