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How to apply a function to two columns of Pandas dataframe

Suppose I have a df which has columns of 'ID', 'col_1', 'col_2' . And I define a function : 12 Answers ...
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Comparing two NumPy arrays for equality, element-wise

... all values of array (A==B) are True. Note: maybe you also want to test A and B shape, such as A.shape == B.shape Special cases and alternatives (from dbaupp's answer and yoavram's comment) It should be noted that: this solution can have a strange behavior in a particular case: if either A or B...
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What is the difference between Numpy's array() and asarray() functions?

What is the difference between Numpy's array() and asarray() functions? When should you use one rather than the other? They seem to generate identical output for all the inputs I can think of. ...
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Auto-size dynamic text to fill fixed size container

...s Attack. I wanted to use jQuery. You pointed me in the right direction, and this is what I ended up with: Here is a link to the plugin: https://plugins.jquery.com/textfill/ And a link to the source: http://jquery-textfill.github.io/ ;(function($) { $.fn.textfill = function(options) { ...
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string sanitizer for filename

I'm looking for a php function that will sanitize a string and make it ready to use for a filename. Anyone know of a handy one? ...
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Difference between natural join and inner join

What is the difference between a natural join and an inner join? 11 Answers 11 ...
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Regular expression to match standard 10 digit phone number

I want to write a regular expression for a standard US type phone number that supports the following formats: 20 Answers ...
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What is a “callback” in C and how are they implemented?

From the reading that I have done, Core Audio relies heavily on callbacks (and C++, but that's another story). 9 Answers ...
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What are the main disadvantages of Java Server Faces 2.0?

...t basic Web Development (HTML/CSS/JS, server side versus client side, etc) and the basic Java Servlet API (request/response/session, forwarding/redirecting, etc), no serious disadvantages comes to mind. JSF in its current release still needs to get rid of the negative image it gained during the earl...
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Recursion in Angular directives

...nk] A post-link function, or an object with function(s) registered via pre and post properties. * @returns An object containing the linking functions. */ compile: function(element, link){ // Normalize the link parameter if(angular.isFunction(link)){ ...