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Remove all the elements that occur in one list from another

Let's say I have two lists, l1 and l2 . I want to perform l1 - l2 , which returns all elements of l1 not in l2 . 7 ...
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How to conditionally push an item in an observable array?

I would like to push a new item onto an observableArray , but only if the item is not already present. Is there any "find" function or recommended pattern for achieving this in KnockoutJS? ...
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Node JS Error: ENOENT

I'm following along with: The Node Beginner Book 6 Answers 6 ...
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Rounding float in Ruby

I'm having problems rounding. I have a float, which I want to round to the hundredth of a decimal. However, I can only use .round which basically turns it into an int, meaning 2.34.round # => 2. Is there a simple effect way to do something like 2.3465 # => 2.35 ...
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How to check for Is not Null And Is not Empty string in SQL server?

How can we check in a SQL Server WHERE condition whether the column is not null and not the empty string ( '' )? 7 Answe...
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Show percent % instead of counts in charts of categorical variables

I'm plotting a categorical variable and instead of showing the counts for each category value. 8 Answers ...
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How do I add files without dots in them (all extension-less files) to the gitignore file?

Like the title says, is it possible to add "files without dots in them" to the gitignore file? 3 Answers ...
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Is it possible to make an HTML anchor tag not clickable/linkable using CSS?

For example if I have this: 9 Answers 9 ...
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Way to read first few lines for pandas dataframe

Is there a built-in way to use read_csv to read only the first n lines of a file without knowing the length of the lines ahead of time? I have a large file that takes a long time to read, and occasionally only want to use the first, say, 20 lines to get a sample of it (and prefer not to load the...
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How to show git log history for a sub directory of a git repo?

Lets say that I have a git repo that looks like this. 6 Answers 6 ...