wildcard

问题 I have a query I'm using for a search with :conditions like this: :conditions => ['family_name LIKE ? OR given_name LIKE ?', "%#{params[:search]}%", "%#{params[:search]}%"] The query works fine locally on SQLite, but when I push to Heroku on PostgreSQL, only the first % works for both family_name and given_name. In other words, it will match a keyword that occurs at the end of a word but not the beginning or middle. Example: There is an existing record with :family_name => "Washington" and

问题 I have some textboxes on a webform that have ids like this: txtFinalDeadline_1 txtFinalDeadline_2 txtFinalDeadline_3 txtFinalDeadline_4 In my jQuery how do I find all of those in order to assign a value to them. Before I had the underscore and they were all named txtFinalDeadline I could do this and it worked. $(this).find("#txtFinalDeadline").val(formatDate); However, that was when they were all named the same thing. Now I have the _x after the name and I'm not sure how to go about assigning

问题 Is there a simple way to support wildcards ("*") when searching strings - without using RegEx? Users are supposed to enter search terms using wildcards, but should not have to deal with the complexity of RegEx: "foo*" => str.startswith("foo") "*foo" => str.endswith("foo") "*foo*" => "foo" in str (it gets more complicated when there are multiple search terms though, e.g. "foo bar baz") This seems like a common issue, so I wonder whether there's a ready-made solution for it. Any help would be

问题 Why is this code valid ArrayList<?>[] arr = new ArrayList<?>[2]; but the following two are not? ArrayList<? extends Object>[] arr = new ArrayList<? extends Object>[2]; ArrayList<? super Object>[] arr = new ArrayList<? super Object>[2]; The two last rows generate the compile error; error: generic array creation. Please clarify difference. update On the other hand ArrayList<?>[] arr = new ArrayList<?>[2]; compiles good but ArrayList<?> arr = new ArrayList<?>(); not. 回答1: There are a few issues

问题 Why is it that the following evaluates as True ? Dim result = "b" Like "*a*b" Thanks. EDIT: To generalize this a bit, the following returns True : "String1" Like "*AnyText1*AnyText2*AnyText???******????*String1" VBA works correctly, returning False . PowerShell works correctly, returning False : PS C:\Users\XXX> "b" -Like "*a*b" False EDIT2: The link to the bug report: https://connect.microsoft.com/VisualStudio/feedback/details/748415/a-bug-in-net-like-operator 回答1: I decided, for fun, to

问题 List<? extends String> list = new Arraylist<String>(); list.add("foo"); Given piece of code gives me compile time error.i don't get it why i can't add string in list. but the code means that we can add the String class object and it's derived class object in the list still i am getting the error why 回答1: List<?> should only be used when you are not concerned with the data type of the items and interested in operations such as getting size of list etc. For Example, public int getSize(List<?>

问题 In Scala, is it bad, from the point of view of efficacy and speed of incremental compilers (sbt, sbt in Eclipse, IntelliJ), to use wildcard imports? Does it adversely affect the way these incremental compilers decide what to recompile in case of changes? For instance, if for a new class X , I would only need to import classes A and B (and not C ) from package pack , do I get a penalty for writing this: import pack._ instead of this? import pack.{ A, B } Assuming A and B have no dependency on

问题 Imagine you have a primary composite index of last_name,first_name . Then you performed a search of WHERE first_name LIKE 'joh%' AND last_name LIKE 'smi%' . Does the wildcard used in the last_name condition mean that the first_name condition will not be used in further helping MySQL find indexes? In other words, by putting a wildcard on the last_name condition MySQL will only do a partial index lookup (and ignores conditions given in the columns that are to the right of last_name)? Further

问题 I'm trying to do something simple and I don't understand why it's not working. I'm really new to MS Access VBA. I have a string in a textbox : \\p9990cdc\C$\Temp I want to turn it into : C:\Temp I'm trying : strSelectedFile = Replace(strSelectedFile, "\\*\C$", "C:") and it's not working. Not sure why RegEx doesn't work either : strSelectedFile = Replace(strSelectedFile, "\\[\w]\C$", "C:") Everything is set properly so the problem lies exactly in that replace code, because if I try for example

问题 I have a value in my database with comma separated data eg. 11,223,343,123 I want to get the data, if it match a certain number (in this example it's number 223). WHERE wp_postmeta.meta_value IN ('223', '223,%', '%,223,%', '%,223') I thought I could use wildcard for it, but with no luck. Any ideas of how to do this? Maybe it's better to do this using PHP? 回答1: Storing stuff in a comma separated list usually is a bad idea, but if you must, use the FIND_IN_SET(str,strlist) function. WHERE FIND