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问题 This question already has answers here : Using URL parameters in MYSQL search (4 answers) Closed 5 years ago . hey i am a beginner in PHP and MYSQL, i am stuck with a basic problem. How can i make my query from URL parameters MY URL EXAMPLES: www.abs.com/index.php?cat=shoes www.abs.com/index.php?cat=shoes&subcat=sports www.abs.com/index.php?cat=shoes&subcat=sports&color=blue How can i handle this kind of URL's in my query, that is just my example query, i have a large set of fields for both

问题 I'm trying to make a search feature that will search multiple columns to find a keyword based match. For example when the user enters a keyword to search, i need to conduct a search across five category columns and return the corresponding row names of all the rows that contain the keyword in either of its category columns. The code is as follows: <?php mysql_connect($dbhost, $dbuser, $dbpass) or die("could not connect."); mysql_select_db($dbname) or die("could not find database."); $result =

问题 I've created the "Customers' Information" in the database. I also put and view it on my customers.php page. Help me to make some "Search box" inside the page. The search box will only search and view what keyword nearer in my database table. Example: When I search "Jenny" the result of search box will be all "Jenny" in my database table. When my search box don't find "Jenny," the search box will say "no results found" Here is my code in customers.php <?php $conn = mysqli_connect('localhost',

问题 So I am trying to search through a specific hard drive (for example, C:) to find a file (like "HxD.exe"), and I am trying to get the specific directory to that file to launch with CreateProcess() . I know that this question has been answered before, but I have tried all those methods and none of them have worked for me (well, one worked but the type of string it gave me couldn't be converted to what CreateProcess() was looking for without losing data). Perhaps I am just doing it wrong?

问题 Is the fastest algorithm for searching an unsorted array for an element linear search? I mean I guess a combination of merge sort + binary search would be slower. Are there any other options? (in terms of algorithms not involving multithreading)? 回答1: Yes, if the array is unsorted and that's all you know about its structure then the fastest way to search for an element is to consider every one which takes linear time O(n) . If you are going to be searching the array a lot then you may want to

问题 I am creating the system that outputs all the registered student in one of my textfile e.g 123 Michael 412 Voker 512 Karl 143 Riki I need to use their ID to search for the student Means i need to read this register student file. The system will only ask for the ID. e.g Type ID num: 123 OUTPUT: Hello Michael your ID number is 123. 回答1: Probably your are looking for a struct or class. Make a Student class I would say. class Student{ public: int id; char *name; }; Student s; Give a go through

问题 This question already has answers here : PHP Array to JSON Array using json_encode(); (5 answers) Closed 5 years ago . Below is my JSON Result when I do not replace the order of channels as per timings: "channels": [ { "id": "1", "name": "LBC دراما " }, { "id": "2", "name": "KTV Arabe" }, { "id": "3", "name": "KTV Plus" } ] Now, when I replace the array keys with values returned by array_search function, it brings the key with array response which is problem for me: "channels": { "0": { "id":

问题 I have a text file sample.txt which have following lines sample1.txt test.ppt example.doc content.pdf I have a dynamic variable called field (example phpcookbook.pdf , sample1.txt ) it should compare with each line in sample.txt file and if the text file does not contain the field it should append to sample.txt . I have tried the following code but it's not working: File insert=new File(sample.txt); BufferedReader br = new BufferedReader(new FileReader(insert)); String strLine; while (

问题 I tried to search for this but maybe I'm looking for it incorrectly. This is for an android app. Essentially, I want to search the database based on some criteria (e.g. subcategory and item name), then use some of the other data values in the row to do a calculation (e.g. get the price value, and use it for a calculation) I am thinking it is something like this query.. Cursor d = db.rawQuery("SELECT * FROM prices WHERE subcat = 'meat' AND item = 'lamb' ") Now I would need to retrieve a column

问题 I am using Lucene.Net for Searching and wanted to know how I can handle this threading issue. I have a single instance of class Test, but the searcher is not threadsafe in this case, since the timer thread can update the index at the same time the request is served, and I do see exception due to that. Any pointers on how to make it thread safe. public class Test { private static object syncObj = new object(); private System.Threading.Timer timer; private Searcher searcher; private