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Begin, Rescue and Ensure in Ruby?

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How to print HTML content on click of a button, but not the page? [duplicate]

I want to print some HTML content, when the user clicks on a button. Once the user clicks on that button, the print dialog of the browser will open, but it will not print the webpage. Instead, it will print the some other HTML content which is not displayed on the page. ...
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Finding Variable Type in JavaScript

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How do I calculate the date six months from the current date using the datetime Python module?

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Using jQuery to center a DIV on the screen

How do I go about setting a <div> in the center of the screen using jQuery? 28 Answers ...
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Convert interface{} to int

I'm trying to get a value from a JSON and cast it to int but it doesn't work, and I don't know how to do it properly. 10 An...
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How to exclude certain directories/files from git grep search

Is there a way to exclude certain paths/directories/files when searching a git repository using git grep ? Something similar to the --exclude option in the normal grep command? ...
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What is the difference between supervised learning and unsupervised learning? [closed]

In terms of artificial intelligence and machine learning, what is the difference between supervised and unsupervised learning? Can you provide a basic, easy explanation with an example? ...
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Writing data into CSV file in C#

I am trying to write into a csv file row by row using C# language. Here is my function 15 Answers ...
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Create an empty data.frame

I'm trying to initialize a data.frame without any rows. Basically, I want to specify the data types for each column and name them, but not have any rows created as a result. ...