regex

问题 I am trying to extract the most recent date that a report was added in an R dataframe of reports. The text always looks like Date Ordered: M/DD/YYYY and may contain 0 many times in a given report. If it's repeating, I want the most recent (usually the last) instance, and I'm trying to convert it to a date in a mutated dplyr column. Using the code below on my actual dataframe, I get the error: Error in if (nchar(s) > 0 && substring(s, 1, 1) == "\002") { : missing value where TRUE/FALSE needed

问题 [FIRST APP] I am providing users with an option to have multiple profiles using different preference files. The users can name their profiles themselves. I have made a custom dialog box to take filename as input in edittext. A valid filename should contains only [A-Z, a-z, 0-9, _, -]. I am letting the user know about this restriction. Whenever a user enters an invalid character, I want that character to be deleted from edittext and preferably display a toast. After a brief search I believe

问题 I have a column in a dataframe that is like this: OWNER -------------- OTTO J MAYER OTTO MAYER DANIEL J ROSEN DANIEL ROSSY LISA CULLI LISA CULLY LISA CULLY CITY OF BELMONT CITY OF BELMONT CITY Some of the names in my data frame are misspelled or having extra/missing characters. I need a column where the names are replaced by any close match in the same column. However, all the similar names need to be group by under one same name. For example this is I what I expect from the data frame above:

问题 I have a stats file that has lines that are like this: "system.l2.compressor.compression_size::1 0 # Number of blocks that compressed to fit in 1 bits" 0 is the value that I care about in this case. The spaces between the actual statistic and whatever is before and after it are not the same each time. My code is something like that to try and get the stats. if (grepl("system.l2.compressor.compression_size::1", line)) { matches <- regmatches(line, gregexpr("[[:digit:]]+\\.*[[:digit:]]", line))

问题 I'm writing a simple HTTP webserver on my Arduino Uno Wifi Rev2 to handle an incoming HTTP POST Request in JSON format. This is how I'm sending the HTTP request (with JSON) from my client: curl \ --request POST \ --header "Content-Type: application/json" \ --data '{ "A": "B", "C": "D" }' \ "http://192.168.4.1/myEndpoint" This is the string the Arduino web-server receives: POST /myEndpoint HTTP/1.1\r\nHost: 192.168.4.1\r\nUser-Agent: curl/7.54.0\r\nAccept: */*\r\nContent-Type: application/json

问题 I need to alter the below Regex to validate emails domains in a oracle database, according to RFC 5322, and ensuring that the criteria below are respected as well. Domain rules that must be respected: must start an end with a letter or digit and be between 1 and 63 characters long. may contain uppercase and lowercase Latin letters (A to Z and a to z). may contain digits 0 to 9, provided that top-level domain names are not all-numeric. may contain hyphen -, provided that it is not the first or

问题 I am using regex to get value from response header in JMeter, I try to get the last value in query tt_unixtime and I failed. Can someone please advise how to user regex to get the last value? I Created a variable called time44444444 and I want it to get the value from the response, the problem is that it stored nothing. 回答1: You have a few issues in your Regular Expression Extractor settings for getting the value matched: Regular expression should be (\w+) - any alphanumeric characters

问题 I have written the following code to use regex to request pages, and look for strings that resemble interest rates. The overall code works; however, it is creating multiple empty dataframes and I can't get the code to drop the empty frames to clean up my output. I have been trying to use .dropna, .drop, and .empty to try and deprecate the dataframes but the output remains unchanged and keeps printing the empty dataframes with the information I have already. Is there an method I am not aware

问题 I need to alter the below Regex to validate emails domains in a oracle database, according to RFC 5322, and ensuring that the criteria below are respected as well. Domain rules that must be respected: must start an end with a letter or digit and be between 1 and 63 characters long. may contain uppercase and lowercase Latin letters (A to Z and a to z). may contain digits 0 to 9, provided that top-level domain names are not all-numeric. may contain hyphen -, provided that it is not the first or

问题 I'm still learning Python so I apologize up front. I am trying to write a watcher that watches for the creation of a file that matches a specific pattern. I am using watchdog with some code that is out there to get it watch a directory. I don't quite understand how to have the watcher watch for a filename that matches a pattern. I've edited the regexes=[] field with what I think might work but I have not had luck. Here is an example of a file that might come in: Hires For Monthly TM_06Jan