There is the new smart match operator: #!/usr/bin/perl use 5.010; use strict; use warnings; my @x = (1, 2, 3); my @y = qw(1 2 3); say “[@x] and [@y] match” if @x ~~ @y; Regarding Array::Compare: Internally the comparator compares the two arrays by using join to turn both arrays into strings and comparing … Read more
Using dplyr: # install.packages(dplyr) library(dplyr) df %>% filter(x == max(y)) %>% # filter the data.frame to keep row where x is maximum select(x) # select column y Alternatively to return a vector df %>% filter(x == max(y)) %>% pull(x) # pull the variable y using base R: df[df$x == max(df$y), “x”]
It looks like your misconception was that you expected PowerShell’s -contains operator to perform substring matching against the elements of the LHS array. Instead, it performs equality tests – as -eq would – against the array’s elements – see this answer for details. In order to perform literal substring matching against the elements of an … Read more
The best way to do this would be to make b a set since you are only checking for membership inside it. >>> a = [1, 2, 3, 4, 5] >>> b = set([9, 7, 6, 5, 1, 0]) >>> [i for i, item in enumerate(a) if item in b] [0, 4]
I prefer to use INDEX/MATCH in practically every situation because it is far more flexible and has the potential to be much more efficient depending on how large the lookup table is. The only time when I can really justify using VLOOKUP is for very straight-forward tables where the column index number is dynamic, although … Read more
Anchor it to the start and end, and match one or more characters: if re.match(“^[a-zA-Z]+$”, aString): Here ^ anchors to the start of the string, $ to the end, and + makes sure you match 1 or more characters. You’d be better off just using str.isalpha() instead though. No need to reach for the hefty … Read more
US addresses are not a regular language, and cannot be matched by using regular expressions. They are helpful in some isolated cases, but in general, they will fail you, especially for input like that. I used to work at an address verification company. In answer to your question, to “highlight an address” in a string … Read more
From String.prototype.match [MDN]: If the regular expression does not include the g flag, returns the same result as regexp.exec(string). Where the RegExp.prototype.exec documentation [MDN] says: The returned array has the matched text as the first item, and then one item for each capturing parenthesis that matched containing the text that was captured. So as you … Read more
Listing all Google domains is not that difficult, because Google has published a list of all public Google domains at http://www.google.com/supported_domains. Prefix every item in this list with “*://* and add the “, suffix to every item. Then copy-paste the result to your manifest file. An alternative option is to use the “include_globs” field (this … Read more
If you’re going for efficiency: import re count = sum(1 for _ in re.finditer(r’\b%s\b’ % re.escape(word), input_string)) This doesn’t need to create any intermediate lists (unlike split()) and thus will work efficiently for large input_string values. It also has the benefit of working correctly with punctuation – it will properly return 1 as the count … Read more