Does this work: $msgid = $_GET[‘msgid’]; $oldMessage=””; $deletedFormat=””; //read the entire string $str=file_get_contents(‘msghistory.txt’); //replace something in the file string – this is a VERY simple example $str=str_replace($oldMessage, $deletedFormat,$str); //write the entire string file_put_contents(‘msghistory.txt’, $str);
Another option is to use find and then pass it through sed. find /path/to/files -type f -exec sed -i ‘s/oldstring/new string/g’ {} \;
Use re.sub. Just match all the chars upto I then replace the matched chars with I. re.sub(r’^.*?I’, ‘I’, stri)
one solution without regex: var expDate=”2016-03″; var formatExp = expDate.split(‘-‘).reverse().join(“https://stackoverflow.com/”); //result is 03/2016 alert(‘result: ‘ + formatExp); var formatExpShort = expDate.substring(2).split(‘-‘).reverse().join(“https://stackoverflow.com/”); //result is 03/16 alert(‘result short: ‘ + formatExpShort);
JavaScript’s regex implementation is not Unicode-aware. It only knows the ‘word characters’ in standard low-byte ASCII, which does not include é or any other accented or non-English letters. Because é is not a word character to JS, é followed by a space can never be considered a word boundary. (It would match \b if used … Read more
You can also do this using replace: sel <- grepl(“var”,names(df)) df[sel] <- lapply(df[sel], function(x) replace(x,x %in% 3:4, NA) ) df # name foo var1 var2 #1 a 1 1 NA #2 a 2 2 NA #3 a 3 NA NA #4 b 4 NA NA #5 b 5 5 NA #6 b 6 6 NA … Read more
REPLACE internally performs a delete and then an insert. This can cause problems if you have a foreign key constraint pointing at that row. In this situation the REPLACE could fail or worse: if your foreign key is set to cascade delete, the REPLACE will cause rows from other tables to be deleted. This can … Read more
Strings are immutable in Java. Make sure you re-assign the return value to the same String variable: str = str.replaceAll(“\\[“, “”); For the normal replace method, you don’t need to escape the bracket: str = str.replace(“[“, “”);
You can do this with AWK using variable substitution. We can set a variable in AWK using -v, and then use AWK’s gsub function to substitute all occurrences of a regular expression with that variable. For example, if the file test has the following contents … foo bar blah _data_and_data_ foo _data_ foobar _data_ again … Read more
Use LEFT combined with CHARINDEX: UPDATE MyTable SET MyText = LEFT(MyText, CHARINDEX(‘;’, MyText) – 1) WHERE CHARINDEX(‘;’, MyText) > 0 Note that the WHERE clause skips updating rows in which there is no semicolon. Here is some code to verify the SQL above works: declare @MyTable table ([id] int primary key clustered, MyText varchar(100)) insert … Read more