overwrite

问题 I have R version 3.1.0 and am using Windows 7. I am trying to write a loop for a dataset with 474 rows. For every unique ID value I can have several values for the tow column. The strata and number columns are the same for all unique values of ID. I would like to calculate the variance with this equation: (sum((sall$tow-sall$strata)^2))/unique(sall$number)* (unique(sall$number)-1) for all unique ID values. From what I have been reading online it looks like my loop is overwriting itself. To

问题 I have an array named columnsArray[] it is pre-defined to contain 6 Strings. When i run my method columns() it should overwrite the columnsArray[] with a new array of Strings that the user selects by checking boxes. The way i have tried to implement this adds each box checked to an arrayList and then convert the arrayList to array[]. However when the code is run, columnsArray is not overwritten. Here is my code so far: public class EditView { private JFrame frame; JCheckBox appNo, name,

问题 I was trying to tar a file and ended up overwriting it. I was working in Xcode and I'm wondering if there is a way for me to recover the overwritten file. 回答1: Unless you saved it somewhere else, its unlikely. sorry 回答2: Yes, from your backups which, of course, you do regularly and frequently, right? On second thoughts, you probably don't, so you're fresh out of luck. I'd look on this as an opportunity to change your backup practices :-). 回答3: If you mean that you added the same file twice in

问题 type Dictionary = [(String, String)] dict :: Dictionary dict = ("Deutsch", "English"):[] insert :: Dictionary -> (String,String) -> Dictionary insert dict entry = dict ++ [entry] One thing that I didn't find about the way lists work: Is it somehow possible to overwrite the existing dict with the entry added in insert? Or is it necessary to, in the next step, always write out the list that was put out by insert? insert [("German", "English"), ("Hallo", "hello")] ("Versuch", "try") So far, this

问题 I am just trying to make a log file here. I have tried doing something with OpenTextFile instead of CreateTextFile , but then it just writes nothing and I'm really not sure why and I'm having trouble finding the info I need. 'Nick Repella 10/29/13 'Needed in case object does not exist (outdated list) On Error Resume Next Function IsCompDisabled(strLine) Dim objComputer objComputer = "LDAP://cn=" objComputer = objComputer & strLine objComputer = objComputer & ",ou=HIDDENOU,dc=HIDDENDC,dc

问题 I have a component that has a controller called MyproductControllerGeneralsetting which extends JControllerForm . Inside MyproductControllerGeneralsetting I am overwriting the save method from the parent class in order to modify $_POST data and then the overwriting method calls the parent class' save method to do the actual saving. Here's the overwritten method in MyproductControllerGeneralsetting : /** * We overwrite the saved form data and trim them to avoid spaces */ public function save(

问题 I have a component that has a controller called MyproductControllerGeneralsetting which extends JControllerForm . Inside MyproductControllerGeneralsetting I am overwriting the save method from the parent class in order to modify $_POST data and then the overwriting method calls the parent class' save method to do the actual saving. Here's the overwritten method in MyproductControllerGeneralsetting : /** * We overwrite the saved form data and trim them to avoid spaces */ public function save(

问题 I have a piece of code that generates new data whenever there is new data available as InputStream . The same file is overwritten everytime. Sometimes the file becomes 0 kb before it gets written. A webservice reads these files at regular intervals. I need to avoid the case when the file is 0 bytes. How do it do this? Will locks help in this case? If the browser comes in to read a file which is locked, will the browser continue to show old data from the cache until the lock is released and

问题 I have a text file (a.txt) that looks like the following. open close open open close open I need to find a way to replace the 3rd line with "close". I did some search and most method involve searching for the line than replace it. Can't really do it here since I don't want to turn all the "open" to "close". Essentially (for this case) I'm looking for a write version of IO.readlines("./a.txt") [2]. 回答1: How about something like: lines = File.readlines('file') lines[2] = 'close' << $/ File.open

问题 I used ggplot with facet_grid and I'd like to indicate on each facet the number of observations in each facet. I follow examples provided on many sites but when I get it to write anything, it writes all four observation numbers on top of each other on all four plots. Here the geom_text layer command: geom_text(data=ldata, aes(x=xpos, y=ypos, label=lab, size=1), group=NULL, hjust=0, parse=FALSE) and ldata is a data frame listing the coordinates (xpos, ypos) on each plot and the number of