replace
How to count search results in Vim?
You can count the number of matches using the n flag in the substitute command. Use the following to show number of times that some-word matches text in current buffer: :%s/some-word//gn You can read all the details on the vim tips wiki
Search and replace on specific lines in Vim
Vim has special regular expression atoms that match in certain lines, columns, etc.; you can use them (possibly in addition to the range) to limit the matches: :5,12s/\(\%5l\|\%12l\)foo/bar/g See :help /\%l
Replace all elements of NumPy array that are greater than some value
I think both the fastest and most concise way to do this is to use NumPy’s built-in Fancy indexing. If you have an ndarray named arr, you can replace all elements >255 with a value x as follows: arr[arr > 255] = x I ran this on my machine with a 500 x 500 random … Read more
Case-insensitive PowerShell replacement
Call me pedantic but while nobody here was outright wrong, nobody provided the correct code for the final solution either. You need to change this line: $NullSessionPipes = $NullSessionPipes.replace(“browser”, “”) to this: $NullSessionPipes = $NullSessionPipes -ireplace [regex]::Escape(“browser”), “” The strange [regex] text isn’t strictly necessary as long as there are no regular expression characters (ex. … Read more
Is str.replace(..).replace(..) ad nauseam a standard idiom in Python?
Do you have an application that is running too slow and you profiled it to find that a line like this snippet is causing it to be slow? Bottlenecks occur at unexpected places. The current snippet traverses the string 5 times, doing one thing each time. You are suggesting traversing it once, probably doing doing … Read more
Replace multiple spaces with one space in a string
bool BothAreSpaces(char lhs, char rhs) { return (lhs == rhs) && (lhs == ‘ ‘); } std::string::iterator new_end = std::unique(str.begin(), str.end(), BothAreSpaces); str.erase(new_end, str.end()); How this works. The std::unique has two forms. The first form goes through a range and removes adjacent duplicates. So the string “abbaaabbbb” becomes “abab”. The second form, which I used, … Read more
replacing text in a file with Python
This should do it replacements = {‘zero’:’0′, ‘temp’:’bob’, ‘garbage’:’nothing’} with open(‘path/to/input/file’) as infile, open(‘path/to/output/file’, ‘w’) as outfile: for line in infile: for src, target in replacements.items(): line = line.replace(src, target) outfile.write(line) EDIT: To address Eildosa’s comment, if you wanted to do this without writing to another file, then you’ll end up having to read your … Read more