search

问题 I'm working on an 'advanced search' page on a site where you would enter a keyword such as 'I like apples' and it can search the database using the following options: Find : With all the words, With the exact phrase , With at least one of the words, Without the words I can take care of the 'Exact phrase' by: SELECT * FROM myTable WHERE field='$keyword'; 'At least one of the words' by: SELECT * FROM myTable WHERE field LIKE '%$keyword%';//Let me know if this is the wrong approach But its the

问题 I am writing an in-house application that holds several pieces of text information as well as a number of pieces of data about these pieces of text. These pieces of data will be held within a database (SQL Server, although this could change) in order of entry. I'd like to be able to search for the most relevant of these pieces of information, with the most relevant of these to be at the top. I originally looked into using SQL Server Full-Text Search but it's not as flexible for my other needs

问题 When using the 'in' operator to search for an item in a list e.g. if item in list: print item What algorithm is used to search for this item. Is it a straight search of the list from beginning to end or does it use something like binary search? 回答1: list s can't be assumed to be in sorted order (or any order at all), so binary search won't work. Nor can the keys be assumed to be hashable, so unlike a dict or set a hash-table lookup can't be used to accelerate the search At a guess it's a

问题 I'm trying to find a way to list all registered domains under a top-level domain (TLD). I.e. everything under .com, .net, etc. All the tools I find only applies to finding subdomains under a domain. 回答1: The information you seek isn't openly available. However, there are a few options you can try: You might want to try inquiring at the respective registries directly about getting access to the Zone files. However, the process can take weeks and some registries choose not to offer access at

问题 I cannot figure out how to implement the search box in my google maps. I have it where the user can pick some stuff from a form and it loads the markers on the map. Now I want to add where they can type in the city and state using the google search box, like on maps.google.com. Can this be done with API v. 3? 回答1: There is no complete "widget" in Google maps for this task. But it is easy to accomplish it. In HTML you can have a text field and a button "Search". (Instead you can handle the

问题 Given a very large database of product names, how would you detect possible typos in user searches and suggest possible corrections (Kinda like the way Google presents them)? E.g. User enters "fork handels" and presses 'search'. They get back "No results. Did you mean 'fork handles'?" 回答1: There are several approaches for this problem: Keeping a table of most popular misspellings in your database. If you need some common misspellings: here) Using an algorithm based on the edit distance : In

问题 I would like to know if/how I can make vim look for the next occurrence of a variable. Let's say the variable's name is simply 'n', then /n would give me all occurrences of that letter, which isn't always terribly helpful. I guess I could create a regex to solve the problem, but I wondered whether there was some command/keystroke I simply don't yet know about; and as all my googling has been to no avail I decided to put a question on here. Thanks a lot for your help! 回答1: If you have the

问题 In a program I need to efficiently answer queries of the following form: Given a set of strings A and a query string q return all s ∈ A such that q is a subsequence of s For example, given A = {"abcdef", "aaaaaa", "ddca"} and q = "acd" exactly "abcdef" should be returned. The following is what I have considered considered so far: For each possible character, make a sorted list of all string/locations where it appears. For querying interleave the lists of the involved characters, and scan

问题 I'm looking for a way to search a whole subversion server. I already got a piece of the puzzle to search within a repository. Now I need to do this for every repository. Update: I have to access this list from some unix shell script (perl, bash, etc.) 回答1: I was also looking to list repositories in SVN. I did something like this on shell prompt: ~$ svn list https://www.repo.rr.com/svn/main/team/gaurav Test/ Test2/ Test3/ Test4/ Test5/ Test6/ 回答2: If you enable svn via apache and a

问题 I have a really simple blog application and I want to add a really simple search feature to it. There are 3 key fields to my model. class BlogPost(models.Model): title = models.CharField(max_length=100) # the title intro = models.TextField(blank=True, null=True) # an extract content = models.TextField(blank=True, null=True) # full post I don't need a Google. I don't want to search comments (which are held on Disqus anyway). I just want a date-ranked, keyword filtered set of posts. Everything