parentheses

问题 I am still learning Perl, so apologies if this is an obvious question. Is there a way to match text that is NOT enclosed by parenthesis? For example, searching for foo would match the second line only. (bar foo bar) bar foo ( bar foo (bar) (foo) ) 回答1: This is very far from "obvious"; on the contrary. There is no direct way to say "don't match" for a complex pattern (there is good support at a character level, with [^a] , \S etc). Regex is firstly about matching things, not about not-matching

问题 So I have a script I need to write and one of the largest problems boils down to finding the largest valid subsequence within a string. So I have something like "()(({}[](][{[()]}]{})))(" as an input and I would need to return "[{[()]}]{}" as an output. I have tried using a stack like structure like you would do if it was just parentheses but haven't been able to figure out something that works. I'd prefer a solution in python but any guidance anyone can offer will help regardless of language

问题 This question already has answers here : matching parentheses in python regular expression (3 answers) Closed 1 year ago . I have a txt file containing strings as: A 123 B 456 Ab(123) ...... I wish to search Ab(123) in txt file. What I have tried : re.search(r'Ab(123)',string) 回答1: There are 12 characters with special meanings, you escape to its literal meaning with \ in front of it. re.search(r'Ab\(123\)',string) # or re.findall(r'Ab\(123\)',string) Look up https://regex101.com/r/1bb8oz/1

问题 I have these code lines for take to operators between parentheses: string filtered = Regex.Replace(input, "\\(.*?\\)", string.Empty); var result = filtered.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries) .Where(element => element == "OR" || element == "AND"); string temp = string.Join(" ", result); These lines do not work for nested parentheses. For example; it is working for this input : X1 OR ( X2 AND X3 AND X4 AND X5 ) OR X6 It give me this result: OR OR But, when my input has

来源： https://stackoverflow.com/questions/57017736/why-is-object-keys-method-not-added-to-object-prototype

来源： https://stackoverflow.com/questions/57017736/why-is-object-keys-method-not-added-to-object-prototype

问题 Is is possible to tweak VSCode so that when function gets autocompleted it is written with () instead of just plain function name? For example when I type str and autocomplete to strlen I would like to get strlen() , it saves quite some time. 回答1: It can be solved by ticking javascript.suggest.completeFunctionCalls property up. Run code snippet to see the gif. <div style='position:relative; padding-bottom:calc(40.34% + 44px)'><iframe src='https://gfycat.com/ifr/CleverActualHornbill'

问题 Is is possible to tweak VSCode so that when function gets autocompleted it is written with () instead of just plain function name? For example when I type str and autocomplete to strlen I would like to get strlen() , it saves quite some time. 回答1: It can be solved by ticking javascript.suggest.completeFunctionCalls property up. Run code snippet to see the gif. <div style='position:relative; padding-bottom:calc(40.34% + 44px)'><iframe src='https://gfycat.com/ifr/CleverActualHornbill'

问题 This question already has an answer here : Copy text between parentheses in pandas DataFrame column into another column (1 answer) Closed 18 days ago . My df has 2 columns: Name Attr a(bc) b(aca) (cba) I would like the column Attr to have the values within parentheses of column Name Name Attr a(bc) bc b(aca) aca (cba) cba I tried: df['Attr'] = re.findall('\(.*?\)',df['Name'].astype('str')) TypeError: expected string or buffer Really appreciate any help 回答1: Use str.extract: df['Attr'] = df[

问题 This question already has an answer here : Copy text between parentheses in pandas DataFrame column into another column (1 answer) Closed 18 days ago . My df has 2 columns: Name Attr a(bc) b(aca) (cba) I would like the column Attr to have the values within parentheses of column Name Name Attr a(bc) bc b(aca) aca (cba) cba I tried: df['Attr'] = re.findall('\(.*?\)',df['Name'].astype('str')) TypeError: expected string or buffer Really appreciate any help 回答1: Use str.extract: df['Attr'] = df[