delimiter

问题 In my model I defined some procedures. The code (generated by MySQL Workbench) contains DELIMITER definitions, so the procedures look like: -- schema CREATE DATABASE ... CREATE TABLE foo ... -- procedures DELIMITER $$ ... BEGIN DECLARE ... ; OPEN ... ; SET ... ; ... ; END$$ DELIMITER ; Now I need to "import" the SQL to the database via PDO. I tried to pass it as input for the PDO#exec(...), but noticed, that the execution stops on the line of the first DELIMITER definition. I don't want

问题 What is the difference between sep and delimiter attributes in pandas.read_csv() method? Also what is the situation when I would choose one over the other? In documentation I read something about Python builtin sniffer tool, also in delimiter, it says alternative argument name for sep , then why cant we have only one attribute? 回答1: Confirmation that they are the same thing can be found in the source code: # Alias sep -> delimiter. if delimiter is None: delimiter = sep I agree with the other

问题 I have an input file as such: This is a text block start This is the end And this is another with more than one line and another line. The desired task is to read the files by section delimited by some special line, in this case it's an empty line, e.g. [out]: [['This is a text block start', 'This is the end'], ['And this is another','with more than one line', 'and another line.']] I have been getting the desired output by doing so: def per_section(it): """ Read a file and yield sections

问题 I have got data which looks like: "1234"||"abcd"||"a1s1" I am trying to read and write using Python's csv reader and writer. As the csv module's delimiter is limited to single char, is there any way to retrieve data cleanly? I cannot afford to remove the empty columns as it is a massively huge data set to be processed in time bound manner. Any thoughts will be helpful. 回答1: The docs and experimentation prove that only single-character delimiters are allowed. Since cvs.reader accepts any

问题 I have data in the following format: .......{INFO1}.....[INFO2].... For awk it should be really simple to pick up the INFO1 and INFO2 parts, but I'm really struggling with it. I have managed to get the [INFO2] part by using awk -F'[][]' '{ print $2 }' but the INFO1 just will not match for me. How do I specify {} as delimiters? 回答1: Just use [][{}] to define that you can use either of these: [ , ] , { or } as field separators awk -F"[][{}]" '{print ...}' file In general, you say -F"[PATTERNS]"

问题 I need to extract all the characters to the right of a hyphen as part of a select statement. There will be other columns in the select. In the below query, the right three characters are selected from the second column. How would I extract an indefinite number of characters to the right of a delimiter – in my case a hyphen? Can I use the right function? Do I need to use another function? Select column1, right(column2,3) as extracted, column3 From myTable I am using SQL Server 2008. 回答1: This

问题 I need help figuring out how to split strings in a column of a data frame based on the last delimiter when I have varying numbers of the same delimiter in R. For example, col1 <- c('a', 'b', 'c') col2 <- c('a_b', 'a_b_c', 'a_b_c_d') df <- data.frame(cbind(col1, col2)) And I would like to split df$col2 to have a data frame that looks like: col1 <- c('a', 'b', 'c') col2 <- c('a', 'a_b', 'a_b_c') col3 <- c('b', 'c', 'd') 回答1: These use no packages. They assume that each element of col2 has at

问题 the answer to this could be easy. But I'm very fresh to programming. So be gentle... I'm at work trying to do a quick fix for one of your customers. I want to get the total numbers of digits in a integer, and then explode the integer: rx_freq = 1331000000 ( = 10 ) $array[0] = 1 $array[1] = 3 . . $array[9] = 0 rx_freq = 990909099 ( = 9 ) $array[0] = 9 $array[1] = 9 . . $array[8] = 9 I'm not able to use explode, as this function need a delimiter. I've searched the eyh'old Google and

问题 I am having trouble with the delimiter in the TStringList Class. Take a look: var s: string; sl: TStringList; begin sl := TStringList.Create; s := 'Users^foo bar^bar foo^foobar^barfoo'; sl.Delimiter := '^'; sl.DelimitedText := s; ShowMessage(sl[1]); end; sl[1] SHOULD return 'foo bar' sl[1] DOES return 'foo' It seems that the delimiter is now '^' AND ' ' Any ideas? 回答1: You should set s1.StrictDelimiter := True for spaces not to be considered delimiters, more info here. Since you work in a

问题 I have a formatted string from a log file, which looks like: >>> a="test result" That is, the test and the result are split by some spaces - it was probably created using formatted string which gave test some constant spacing. Simple splitting won't do the trick: >>> a.split(" ") ['test', '', '', '', ... '', '', '', '', '', '', '', '', '', '', '', 'result'] split(DELIMITER, COUNT) cleared some unnecessary values: >>> a.split(" ",1) ['test', ' result'] This helped - but of course, I really