I have the following piece of code from this question: def addChild(n: Node, newChild: Node) = n match { case Elem(prefix, label, attribs, scope, child @ _*) => Elem(prefix, label, attribs, scope, child ++ newChild : _*) case _ => error(“Can only add children to elements!”) } Everything in it is pretty clear, except this … Read more
How can I count the number of “_” in a string like “bla_bla_blabla_bla”? 13 Answers 13
I’m looking for a way to test whether or not a given string repeats itself for the entire string or not. Examples: [ ‘0045662100456621004566210045662100456621’, # ‘00456621’ ‘0072992700729927007299270072992700729927’, # ‘00729927’ ‘001443001443001443001443001443001443001443’, # ‘001443’ ‘037037037037037037037037037037037037037037037’, # ‘037’ ‘047619047619047619047619047619047619047619’, # ‘047619’ ‘002457002457002457002457002457002457002457’, # ‘002457’ ‘001221001221001221001221001221001221001221’, # ‘001221’ ‘001230012300123001230012300123001230012300123’, # ‘00123’ ‘0013947001394700139470013947001394700139470013947’, # ‘0013947’ ‘001001001001001001001001001001001001001001001001001’, # ‘001’ ‘001406469760900140646976090014064697609’, # … Read more
Say I want to copy the contents of a directory excluding files and folders whose names contain the word ‘Music’. cp [exclude-matches] *Music* /target_directory What should go in place of [exclude-matches] to accomplish this? 11 Answers 11
In C# 7, we can use if (x is null) return; instead of if (x == null) return; Are there any advantages to using the new way (former example) over the old way? Are the semantics any different? Is it just a matter of taste? If not, when should I use one over the other? … Read more
I know it’s possible to match a word and then reverse the matches using other tools (e.g. grep -v). However, is it possible to match lines that do not contain a specific word, e.g. hede, using a regular expression? Input: hoho hihi haha hede Code: grep “<Regex for ‘doesn’t contain hede’>” input Desired output: hoho … Read more
