str-replace

问题 I'm scraping a website using Selenium. When I get the text of a list of elements (headers), this is what it prints: ['Countyarrow_upward Reportingarrow_upward Totalarrow_upward Bennet (D)arrow_upward Biden (D)arrow_upward Bloomberg (D)arrow_upward Booker (D)arrow_upward Boyd (D)arrow_upward Buttigieg (D)arrow_upward Castro (D)arrow_upward De La Fuente III (D)arrow_upward Delaney (D)arrow_upward Ellinger (D)arrow_upward Gabbard (D)arrow_upward Greenstein (D)arrow_upward Klobuchar (D)arrow

问题 First time on Stackvoverflow so hope I am posting this correctly & as clear as possible. Please feel free to rip this apart and let me know how to post clearer questions in the future if need be. Newbie to Ruby here and practising where I can. I want to know how to replace instances in a string in ruby. for example: say I have: string = 'richard julie richard julie sam letty sam letty' How would I replace any instance in the string, that does not equal 'richard' or 'julie' & replace with the

问题 I know that variants of this topic have been discussed elsewhere, but none of the other threads were helpful. I want to hand over a string from python to sql. It might however happen that apostrophes (') occur in the string. I want to escape them with a backslash. sql = "update tf_data set authors=\'"+(', '.join(authors).replace("\'","\\\'"))+"\' where tf_data_id="+str(tf_data_id)+";" However, this will always give \\' in my string. Therefore, the backslash itself is escaped and the sql

问题 I want to remove all \r \n \r\n which is pretty easy to so I wrote: str_replace(array("\r","\n"),"",$text); but I saw this line: str_replace(array("\r","\n","\\r","\\n"),"",$text); and I was wondering what is the double backslash means \\r and \\n . 回答1: \ is an escape character, it's used to escape the following character. In "\n" , the backslash escapes n and the result will be a new line character. In "\\n" , the first backslash escapes the second backslash and the n is kept as is, so the

问题 I have an array like this: $keywords = array( 'php', 'html', 'css' ); I have a db query to return a paragraph, which contains the keywords previously mentioned in the array. I have a link template like this: $linktpl = '<a href="%s" title="%s">%s</a>'; I want a simple function to scan that paragraph and on the fly, whenever it finds a keyword it converts it to a link using the link template above. And if possible I want it to take into account singular and plural (like framework and

问题 I have an array like this: $keywords = array( 'php', 'html', 'css' ); I have a db query to return a paragraph, which contains the keywords previously mentioned in the array. I have a link template like this: $linktpl = '<a href="%s" title="%s">%s</a>'; I want a simple function to scan that paragraph and on the fly, whenever it finds a keyword it converts it to a link using the link template above. And if possible I want it to take into account singular and plural (like framework and

问题 I have a Python 2.7 Pandas Data frame like following: Id Title URL Id-1 Bruce Almighty https://www.youtube.com/watch?v=5VGyTOGxyVA Id-2 Superhero Movie https://www.youtube.com/watch?v=3BnXz-7-y-o Id-3 Taken https://www.youtube.com/watch?v=vjbfiOERDYs Id-4 Forest Gump https://www.youtube.com/watch?v=eJFkCJySHdY&t=524s I want to replace part of string "?v=" with some other string, for example "ppp"from the column "URL". I tried by normal replace command: df['URL'] = df['URL'].str.replace('?v=',

问题 Basically what I'm looking for is the PHP version of this thread: Find, replace, and increment at each occurence of string I would like to replace the keyword following > at the start of rach line with an incrementing counter. If my input is: >num, blah, blah, blah ATCGACTGAATCGA >num, blah, blah, blah ATCGATCGATCGATCG >num, blah, blah, blah ATCGATCGATCGATCG I would like it to be... >0, blah, blah, blah ATCGACTGAATCGA >1, blah, blah, blah ATCGATCGATCGATCG >2, blah, blah, blah ATCGATCGATCGATCG

来源： https://stackoverflow.com/questions/32413667/replace-all-occurrences-of-a-substring-in-a-string-in-c

来源： https://stackoverflow.com/questions/27294864/is-it-possible-to-invert-a-call-to-strings-replaceall-method