replace

问题 I am doing the following SQL tutorial: http://sql.learncodethehardway.org/book/ex11.html and in this exercise the author says in the second paragraph: In this situation, I want to replace my record with another guy but keep the unique id. Problem is I'd have to either do a DELETE/INSERT in a transaction to make it atomic, or I'd need to do a full UPDATE. Could anyone explain to me what the problem is with doing an UPDATE, and when we might choose REPLACE instead of UPDATE? The UPDATE code:

问题 I am trying to replace whole words only, but my script replaces all the case-sensitive instances of the word. Here is my code: <script> function repl() { var lyrics = document.getElementById('Lyricstuff').value; var find = document.getElementById('rs1').innerHTML; var spantag = document.getElementById('rt1').innerHTML; var regex = new RegExp(find, "g"); document.getElementById('Results').value = lyrics.replace(regex, spantag) ; } </script> <textarea id="Lyricstuff" cols="60" rows="10">C CAT

问题 I am trying to replace whole words only, but my script replaces all the case-sensitive instances of the word. Here is my code: <script> function repl() { var lyrics = document.getElementById('Lyricstuff').value; var find = document.getElementById('rs1').innerHTML; var spantag = document.getElementById('rt1').innerHTML; var regex = new RegExp(find, "g"); document.getElementById('Results').value = lyrics.replace(regex, spantag) ; } </script> <textarea id="Lyricstuff" cols="60" rows="10">C CAT

问题 This question already has answers here : How to replace two things at once in a string? (6 answers) Closed 4 years ago . so I am trying to make a simple program that will decode one phrase into a different one. This is the code I have now def mRNA_decode(phrase): newphrase = phrase.replace('A','U'),phrase.replace('T','A'),phrase.replace('C','G'),phrase.replace('G','C') return newphrase So basically, if I give the string 'TATCGTTAATTCGAT' , the desired output would be 'AUAGCAAUUAAGCUA' instead

问题 I would like to replace outliers in each column of a dataframe with NA. If for example we define outliers as being any value greater than 3 standard deviations from the mean I can achieve this per variable with the code below. Rather than specify each column individually I'd like to perform the same operation on all columns of df in one call. Any pointers on how to do this?! Thanks! library(dplyr) data("iris") df <- iris %>% select(Sepal.Length, Sepal.Width, Petal.Length)%>% head(10) # add a

问题 line_index="2d"; file="./Desktop/books.sh"; sed -i.bak -e $line_index $file Will delete the entire line that $line_index is pointing to sed -i "s/harry/potter/g" $file will search for harry and replace with potter Is there anyway that i can combine both statement so it will only replace the specific line number of harry instead of all the harry in the file. 回答1: Sure, "addresses" and "commands" can be freely combined: sed '2s/harry/potter/g' 回答2: To restrict substitution to a line number, add

问题 I want to compare a character in a string with the letter "R". So I want to check if the character on the position i in the string is a "R", a "L" or a "F". This is my code, but it doesn't word... I'm a Java beginner and really happy about every idea to improve my code and makes it work. for (int i = s.length()-2; i >= 0; i--){ if (s.charAt(i) == "R"){ s = s + "L";} else if (s.charAt(i) == L){ s = s + "R";} else {s = s + "F";} // s = s + s.charAt(i); }//for By the way, the complete exercise

问题 I want to compare a character in a string with the letter "R". So I want to check if the character on the position i in the string is a "R", a "L" or a "F". This is my code, but it doesn't word... I'm a Java beginner and really happy about every idea to improve my code and makes it work. for (int i = s.length()-2; i >= 0; i--){ if (s.charAt(i) == "R"){ s = s + "L";} else if (s.charAt(i) == L){ s = s + "R";} else {s = s + "F";} // s = s + s.charAt(i); }//for By the way, the complete exercise

问题 I am using a WordPress plugin named Acronyms (https://wordpress.org/plugins/acronyms/). This plugin replaces acronyms with their description. It uses a PHP PREG_REPLACE function. The issue is that it replaces the acronyms contained in a <pre> tag, which I use to present a source code. Could you modify this expression so that it won't replace acronyms contained inside <pre> tags (not only directly, but in any moment)? Is it possible? The PHP code is: $text = preg_replace( "|(?!<[^<>]*?)(?<![?.

问题 I want to replace a character at N position in a string. This my query: SELECT code FROM tablecodes The result is 3 rows: AXGETYTRTFYZUFYZFFFDIZEG GFYZUFYZFAXFCDIZAX ZUFYZGEFYFAXFFIXZRA I can't figure out how to replace the last 'Z' character on each row with 'A'. I want the result to look like this: AXGETYTRTFYZUFYZFFFDIAEG GFYZUFYZFAXFCDIAAX ZUFYZGEFYFAXFFIXARA The 'Z' character is always in the same position (length of the string - 3) Any suggestions? Thanks. 回答1: Use Stuff Function