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Delete a key from a MongoDB document using Mongoose
...s. So you can do the action in question by this:
User.collection.update({_id: user._id}, {$unset: {field: 1 }});
Since version 2.0 you can do:
User.update({_id: user._id}, {$unset: {field: 1 }}, callback);
And since version 2.4, if you have an instance of a model already you can do:
doc.field...
Convert timestamp to date in MySQL query
...SQL
Make the table with an integer timestamp:
mysql> create table foo(id INT, mytimestamp INT(11));
Query OK, 0 rows affected (0.02 sec)
Insert some values
mysql> insert into foo values(1, 1381262848);
Query OK, 1 row affected (0.01 sec)
Take a look
mysql> select * from foo;
+------...
Resizing an image in an HTML5 canvas
...nvas>
</body>
</html>
My createImage function is called once when the document is loaded and after that it is called every time the window receives a resize event.
I tested it in Chrome 6 and Firefox 3.6, both on the Mac. This "technique" eats processor as it if was ice cr...
Validate that a string is a positive integer
... Infinity && String(n) === str && n >= 0;
}
function gid(id) {
return document.getElementById(id);
}
function test(str, expect) {
var result = isNormalInteger(str);
console.log(
str + ": " +
(result ? "Yes" : "No") +
(expect === undefi...
Why would iterating over a List be faster than indexing through it?
...kedList class, for example)
A linked list doesn't have an inherent index; calling .get(x) will require the list implementation to find the first entry and call .next() x-1 times (for a O(n) or linear time access), where an array-backed list can just index into backingarray[x] in O(1) or constant ti...
Get query string parameters url values with jQuery / Javascript (querystring)
...d way to write a jQuery extension to handle query string parameters? I basically want to extend the jQuery magic ($) function so I can do something like this:
...
Check if a given Type is an Enum
...
@AndrewWhitaker: I figured that since the method is called CanConvert, it will check for multiple different possible conversions, not just if it's an enum. Otherwise you may as well just use the IsEnum property itself.
– Ry-♦
Nov 8 '11 ...
What is the difference between Elastic Beanstalk and CloudFormation for a .NET project?
...nderlying magic works.
CloudFormation, on the other hand, doesn't automatically do anything. It's simply a way to define all the resources needed for deployment in a huge JSON file. So a CloudFormation template might actually create two ElasticBeanstalk environments (production and staging), a co...
Send a file via HTTP POST with C#
...
If possible could show a simple example of calling this method?
– Jacobr365
Mar 15 '16 at 15:15
10
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Restart/undo conflict resolution in a single file
...ead of the two merge points being named "head" and {REVISION}, they're now called "ours" and "theirs".
– TGP1994
Jun 13 '16 at 20:26
29
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