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Efficient way to remove keys with empty strings from a dict
... +1. It's important to note that this does not actually remove the keys from an existing dictionary. Rather, it creates a new dictionary. Usually this is exactly what someone wants and is probably what the OP needs, but it is not what the OP asked for.
– Steven Rumbalski
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Read and write a String from text file
I need to read and write data to/from a text file, but I haven't been able to figure out how.
21 Answers
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source of historical stock data [closed]
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To start with, if you have some money don't bother with downloading data from Yahoo, get the end of day data straight from CSI data, this is where Yahoo gets their EOD data as well AFAIK. They have an API where you can extract the data to whatever format you want. I think the yearly subscription ...
How to import the class within the same directory or sub directory?
...irectory as the files. That will signify to Python that it's "ok to import from this directory".
Then just do...
from user import User
from dir import Dir
The same holds true if the files are in a subdirectory - put an __init__.py in the subdirectory as well, and then use regular import statemen...
What's the difference between event.stopPropagation and event.preventDefault?
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stopPropagation stops the event from bubbling up the event chain.
preventDefault prevents the default action the browser makes on that event.
Examples
preventDefault
$("#but").click(function (event) {
event.preventDefault()
})
$("#foo").click(f...
What is a mixin, and why are they useful?
In " Programming Python ", Mark Lutz mentions "mixins". I'm from a C/C++/C# background and I have not heard the term before. What is a mixin?
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Passing additional variables from command line to make
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You have several options to set up variables from outside your makefile:
From environment - each environment variable is transformed into a makefile variable with the same name and value.
You may also want to set -e option (aka --environments-override) on, and your e...
Relationship between SciPy and NumPy
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Last time I checked it, the scipy __init__ method executes a
from numpy import *
so that the whole numpy namespace is included into scipy when the scipy module is imported.
The log10 behavior you are describing is interesting, because both versions are coming from numpy. One is a uf...
Error message “Forbidden You don't have permission to access / on this server” [closed]
...ince this answer is used as a reference by many, and while I learned a lot from security perspective during these years,
I feel I am responsible to clarify some important notes, and I've update my answer accordingly.
The original answer is correct but not safe for some production environments,
in ...
Angular - ui-router get previous state
...Scope when the state changes.
You should be able to catch the prior state from that event (from is the state you're leaving):
$rootScope.$on('$stateChangeSuccess', function (ev, to, toParams, from, fromParams) {
//assign the "from" parameter to something
});
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