extract

问题 I am importing a file which has amount with different currency signs £12.10 $26.13 €12.50 I need to import and convert this into single currency. I am splitting the string as follows $parts = split(' ', preg_replace("/([0-9])/", ' ${1}', $amount, 1)); Couldn't make preg_split work with PREG_SPLIT_DELIM_CAPTURE $parts = preg_split("/\d/", $amount, 2, PREG_SPLIT_DELIM_CAPTURE); I have an array of currency sign to currency code $currencySymbols = array('£'=>'GBP', '$'=>'USD','€'=>'EUR') I need

问题 Recently I encountered the following problem in my R code. In a function, accepting a data frame as an argument, I needed to add (or replace, if it exists) a column with data calculated based on values of the data frame's original column. I wrote the code, but the testing revealed that data frame extract/replace operations , which I've used, resulted in a loss of the object's special (user-defined) attributes . After realizing that and confirming that behavior by reading R documentation (http

问题 I have checked the FFMpeg documentation and many forums and figured out the correct command-line to extract subtitles from an .MP4 video should look like so: ffmpeg -i video.mp4 -vn -an -codec:s:0 srt out.srt However, I get the following error, which lends me to question whether this is feasible at all: Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height Using ffmpeg -codecs , I can confirm that ffmpeg should be able to

问题 I have a data like below: A:B:C:D and I want to replace the C with data (say, Z ) so that it may look like A:B:Z:D How can I do it? 回答1: =SUBSTITUTE(A1,"C","Z") Although I wasn't clear on whether you wanted G or Z , you mentioned G but your example output shows Z . 回答2: If you have A:B:C:D in cell A1, then this works: =CONCATENATE(MID(A1, 1, SEARCH(":", MID(A1, SEARCH(":", A1) + 1, LEN(A1) - SEARCH(":", A1) + 1)) + SEARCH(":", A1)), "Z", MID(MID(MID(A1, SEARCH(":", A1) + 1, LEN(A1) - SEARCH("

问题 Sample text: $text = 'Administration\Controller\UserController::Save'; Task - extract everything before :: Option 1: list($module) = explode('::',$text); Option 2: $module = substr($text, 0, strpos($text, '::'); Which option is more efficient? 回答1: I ran a test and seems like the first solution is faster. Here is the code for testing it: function microtime_float() { list($usec, $sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec); } function solution1($text) { for($i = 0; $i

问题 enter image description hereI have created a code to help me retrieving the data from csv file import re keywords = {"metal", "energy", "team", "sheet", "solar" "financial", "transportation", "electrical", "scientists", "electronic", "workers"} # all your keywords keyre=re.compile("energy",re.IGNORECASE) with open("2006-data-8-8-2016.csv") as infile: with open("new_data.csv", "w") as outfile: outfile.write(infile.readline()) # Save the header for line in infile: if len(keyre.findall(line))>0:

问题 I have 10 linear models where I only need some information, namely: r-squared, p-value, coefficients of slope and intercept. I managed to extract these values (via ridiculously repeating the code). Now, I need to tabulate these values (Info in the columns; the rows listing results from linear models 1-10). Can anyone please help me? I have hundreds more linear models to do. I'm sure there must be a way. Data file hosted here Code: d<-read.csv("example.csv",header=T) # Subset data A3G1 <-

问题 I am looking at getting the plain text from html. Which one should I choose, php strip_tags or simplehtmldom plaintext extraction? One pro for simplehtmldom is support of invalid html, is that sufficient in itself? 回答1: You should probably use smiplehtmldom for the reason you mentioned and that strip_tags may also leave you non-text elements like javascript or css contained within script/style blocks You would also be able to filter text from elements that aren't displayed (inline style

问题 i am making a windows installer , i need to put some files in my program and then extract them to some folder when program runs , lets say i am going to put 3 files in single exe file . thanks a lot for your help in advance , love ya Stackoverflow members :) 回答1: Have a read here : http://support.microsoft.com/kb/319292 This shows how to extract the resource into a Stream, you can then write this stream to disk. 回答2: There exist two options: (1) add files as resources, and (2) append the

问题 Is it possible to extract a binary, to get the code that is behind the binary? With Class-dump you can see the implementation addresses, but is it possible to also see the code thats IN the implementation addresses? Is there ANY way to do it? 回答1: All your code compiles to single instructions, placed in the text section of your executable. The compiler is responsible for translating your higher level language to the processor specific instructions, which are simpler. Reverting this process