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What's the opposite of chr() in Ruby?

In many languages there's a pair of functions, chr() and ord() , which convert between numbers and character values. In some languages, ord() is called asc() . ...
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Is there a way to pass optional parameters to a function?

Is there a way in Python to pass optional parameters to a function while calling it and in the function definition have some code based on "only if the optional parameter is passed" ...
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How to link to a named anchor in Multimarkdown?

I have come across a number of mentions of MultiMarkdown's support for internal links / named anchors but I am unable to find a single example of how to actually do it. ...
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Split string with multiple delimiters in Python [duplicate]

I found some answers online, but I have no experience with regular expressions, which I believe is what is needed here. 5 A...
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How to determine the memory footprint (size) of a variable?

Is there a function in PHP (or a PHP extension) to find out how much memory a given variable uses? sizeof just tells me the number of elements/properties. ...
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Do I need dependency injection in NodeJS, or how to deal with …?

I currently creating some experimental projects with nodejs. I have programmed a lot Java EE web applications with Spring and appreciated the ease of dependency injection there. ...
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Get statistics for each group (such as count, mean, etc) using pandas GroupBy?

I have a data frame df and I use several columns from it to groupby : 7 Answers 7 ...
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What is the use of the %n format specifier in C?

What is the use of the %n format specifier in C? Could anyone explain with an example? 10 Answers ...
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Escaping ampersand in URL

I am trying to send a GET message that contains strings with ampersands and can't figure how to escape the ampersand in the URL. ...
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Is there a CSS selector for elements containing certain text?

I am looking for a CSS selector for the following table: 18 Answers 18 ...