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Evaluate expression given as a string
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The eval() function evaluates an expression, but "5+5" is a string, not an expression. Use parse...
Which is a better way to check if an array has more than one element?
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Concatenate a vector of strings/character
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Try using an empty collapse argument within the paste function:
paste(sdata, collapse = '')
Th...
pydot and graphviz error: Couldn't import dot_parser, loading of dot files will not be possible
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14 Answers
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ERROR 2003 (HY000): Can't connect to MySQL server on '127.0.0.1' (111)
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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 .
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Declaring variables inside or outside of a loop
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edited Aug 6 '17 at 13:35
answered Jan 10 '12 at 13:12
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What are the most common font-sizes for H1-H6 tags [closed]
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It would depend on the browser's default stylesheet. You can view an (unofficial) table of CSS2...