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Difference between map, applymap and apply methods in Pandas
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Straight from Wes McKinney's Python for Data Analysis book, pg. 132 (I highly recommended this book):
Another frequent operation is applying a function on 1D arrays to each column or row. DataFrame’s apply method does exactly th...
Composer: how can I install another dependency without updating old ones?
...Actually, the correct solution is:
composer require vendor/package
Taken from the CLI documentation for Composer:
The require command adds new packages to the composer.json file from the current directory.
php composer.phar require
After adding/changing the requirements, the modified...
Getting All Variables In Scope
...e been closed over may be referenced by a closure function upon calling it from a caller that is outside of the definition/closure scope (and whose variables are not at all accessible from withing the closure's body).
– DDS
Feb 1 '15 at 19:51
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Generate a random date between two other dates
..., e.g. milliseconds, seconds, hours, days, whatever), subtract the earlier from the later, multiply your random number (assuming it is distributed in the range [0, 1]) with that difference, and add again to the earlier one. Convert the timestamp back to date string and you have a random time in tha...
Django gives Bad Request (400) when DEBUG = False
... @MegaBytes When DEBUG is False, all static file are served from the STATIC_ROOT, so probally a ./manage.py collectstatic will do.
– Blackeagle52
Apr 14 '15 at 12:11
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String comparison using '==' vs. 'strcmp()'
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Wow +1. Quote from the link: "It is established behavior for function that receive the wrong type of argument(s) to return null". That's amazing considering the manual just says this: "Returns < 0 if str1 is less than str2; > 0 if st...
How to detect page zoom level in all modern browsers?
...w it's an even bigger mess than it was when this question was first asked. From reading all the responses and blog posts I could find, here's a summary. I also set up this page to test all these methods of measuring the zoom level.
Edit (2011-12-12): I've added a project that can be cloned: https:/...
Backbone.js: get current route
...wing line returns the current fragment:
Backbone.history.getFragment();
From the Backbone.js documentation:
"
[...]
History serves as a global router (per frame) to handle hashchange events or pushState, match the appropriate route, and trigger callbacks. You shouldn't ever have to create one of...
Generating HTML email body in C#
...ss.
This is how you use it:
MailDefinition md = new MailDefinition();
md.From = "test@domain.com";
md.IsBodyHtml = true;
md.Subject = "Test of MailDefinition";
ListDictionary replacements = new ListDictionary();
replacements.Add("{name}", "Martin");
replacements.Add("{country}", "Denmark");
stri...
Why does casting int to invalid enum value NOT throw exception?
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Taken from Confusion with parsing an Enum
This was a decision on the part of the people who created .NET. An enum is backed by another value type (int, short, byte, etc), and so it can actually have any value that is valid for tho...