find

问题 I am having sqlite database. In some columns I am having null values. I want to replace null values with space.. Is there any query for this? Please let me know 回答1: Use IFNULL. In a query: SELECT IFNULL(mycolumn, ' ') FROM mytable Or to change the data in the table: UPDATE mytable SET mycolumn = IFNULL(mycolumn, ' ') Alternatively: UPDATE mytable SET mycolumn = ' ' WHERE mycolumn IS NULL 来源： https://stackoverflow.com/questions/12585560/find-null-values-from-table-and-replace-it-with-space

问题 Example data in three files. fileOne.txt YYY >> yyy one yyy two yyy three << ZZZ >> zzz one zzz two zzz three << fileTwo.txt XXX >> xxx one xxx two xxx three << fileThree.txt XXX >> xxx one xxx two xxx three << ZZZ >> zzz one zzz two zzz three << I am using awk to output portions of the file between start delimiter ( XXX ) and end delimiter ( << ). This works: awk '/XXX/,/<</' /d/Temp/temp/*.txt Results XXX >> xxx one xxx two xxx three << XXX >> xxx one xxx two xxx three << But I want to

问题 I have a website that uses jquery to scroll around in a defined height/width box. This works great, until you try to Ctrl + F search. Then, it moves around erratically, stopping halfway between pages, and moving my slideshows between slides. This completely breaks it and needs to be reloaded for the functionality to return. Is there any way to disable this? 回答1: you could make it so that Find won't find the words! One way to do this would be to use the js: window.addEventListener("keydown"

问题 I am given a table with two columns - one is P_in and the other P_out: P_in = table(:,1); P_out = table(:,2); I am also given a subset of P_in, which I call P_in2. I want to find the corresponding value of P_out that belongs to P_in2. I tried find(): P_out2_idx = find(table(P_in2,2)); P_out2 = table(P_out2,idx,2); But find() can only deal with integers. My table however, does not show integers, but decimals. Here are three lines from the table: -13.02 49.6 -12.52 49.9 -12.02 50.18 So even

问题 I had a function which was returning "Match" if all the facts are true (although I now seem to have broken it by fiddling around with my current predicament, but that's not my main question). function dobMatch(x) local result = "YearOfBirth" .. x .. "MonthOfBirth" if (result:find("DayOfBirth")~= nil and result:find("MonthOfBirth")~= nil and result:find("YearOfBirth")~= nil) then return "Match" else return nil end end dobList = {dobMatch("DayOfBirth"), dobMatch("Day")} print(#dobList) My

问题 I have a series of music folders. Some of the file names contain an underscore which I would like to get rid of. With find /Users/Chris/CDs -type f -name "*_*" I find all of the files with underscores. it appears that I can add -execdir mv {} to the command but do not know what to add from there. I think {} provides the full path and file name as a string of the file with underscores but I do not know how to use something like sed 's/_//g' to remove the _ on the new file name. Any help would

问题 I have a method where I take in a model and result_size . The first thing i try to do in this method is: array = model.logs.find_in_batches(:batch_size => result_size) But this doesn't work; instead it returns "No Block Given (Yield)". I guess I'm just unfamiliar with blocks and yields. If anyone could help me understand/fix this problem I would greatly appreciate it! Thanks in advance! 回答1: find_in_batches expects you to pass the values into a block, as so: model.logs.find_in_batches(:batch

问题 In AppleScript I know how to do a typical find with something like: tell application "BBEdit" activate open find window find "memberFunction\\(\\)" searching in text 1 of text document "theFile" options {search mode:grep, wrap around:true} with selecting match end tell and I can do a multi file search find: tell application "BBEdit" activate find "memberFunction\\(\\)" searching in {file "path:to:project.bbprojectd:"} options {search mode:grep, showing results:true} end tell but I'd like to

问题 I have a process that audits files from one day to the next on a large file system. I want to exclude some directories from consideration by using a list of directories to exclude. I can do that just fine, but I'm having trouble if an exclude directory has a space in the name. For simplicity's sake, I'm only going to list four sub-directories, but in reality there are many more directories I want to search vs exclude. There's also the chance that a new directory gets added and I want to

问题 The files I'm looking for are of the form cmn-我.flac , where the CJK character is variable. Using find command, what regexp should I use to find all files with a single CJK characters in its name? Hints: The following regexp find all files including those with and without CJK characters : find ./ -regex '.*\..*' # ex: cmn-我.flac Then : find ./ -regex "cmn-.*[\x4e00-\x9fa5]*\.flac" # the `-` breaks => fails find ./ -regex ".*[\x4e00-\x9fa5]*\.flac" # finds with n CJK characters => we get