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Update MongoDB field using value of another field
In MongoDB, is it possible to update the value of a field using the value from another field? The equivalent SQL would be something like:
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How to “EXPIRE” the “HSET” child key in redis?
...he sake of keeping Redis simple.
Quoth Antirez, creator of Redis:
Hi, it is not possible, either use a different top-level key for that
specific field, or store along with the filed another field with an
expire time, fetch both, and let the application understand if it is
still valid or n...
Concat scripts in order with Gulp
...
I had a similar problem recently with Grunt when building my AngularJS app. Here's a question I posted.
What I ended up doing is to explicitly list the files in order in the grunt config. The config file will then look like this:
[
'/path/to/app.js',
'/...
how to create a file name with the current date & time in python?
Here is a functional code (Create file with success)
6 Answers
6
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How to force ASP.NET Web API to always return JSON?
...ly JSON in ASP.NET Web API – THE RIGHT WAY
Replace IContentNegotiator with JsonContentNegotiator:
var jsonFormatter = new JsonMediaTypeFormatter();
//optional: set serializer settings here
config.Services.Replace(typeof(IContentNegotiator), new JsonContentNegotiator(jsonFormatter));
JsonConte...
What does new self(); mean in PHP?
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self points to the class in which it is written.
So, if your getInstance method is in a class name MyClass, the following line :
self::$_instance = new self();
Will do the same as :
self::$_instance = new MyClass();
Edit : a couple more information...
ASP.NET Identity's default Password Hasher - How does it work and is it secure?
...ssword Hasher that is default implemented in the UserManager that comes with MVC 5 and ASP.NET Identity Framework, is secure enough? And if so, if you could explain to me how it works?
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Using PUT method in HTML form
...follow
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edited Sep 2 '14 at 7:01
Danubian Sailor
21.1k3131 gold badges136136 silver badges207207 bronze badges
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How do I raise the same Exception with a custom message in Python?
... Ben's answer
To attach a message to the current exception and re-raise it:
(the outer try/except is just to show the effect)
For python 2.x where x>=6:
try:
try:
raise ValueError # something bad...
except ValueError as err:
err.message=err.message+" hello"
raise ...
How to get line count of a large file cheaply in Python?
...you have, and return that result.
Do you have a better way of doing that without reading the entire file? Not sure... The best solution will always be I/O-bound, best you can do is make sure you don't use unnecessary memory, but it looks like you have that covered.
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