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问题 How to highlight the text "cell phone" in the image? Updated I want to search text on a page and if found, the text should be highlighted in the way I have shown in the attached image. 回答1: Output This Regular Expressions tutorial has detail on how to search the desired text using regular expression on UITextview and how to highlight it. Essential Code that is to be used: - (void)viewDidLoad { [super viewDidLoad]; [self searchData]; } 1) Following code searches for the required pattern from

问题 How Would the Reverse Image Search Engines like TinEye Work ? I mean what parameters are required to do an image search ? 回答1: Don't know if TinEye use exactly this one, but SURF is a commonly used algorithm for this purpose. Here you can see an usage example in Mathematica where a partial matching of images is used to compose a landscape: 回答2: database: Generaly you have set of images that are collected from web sites. For each image extract key features (SURF, SIFT, whatever) in a form of

问题 I'm trying to use GitHub's code search to search for some lines of code containing characters like = , + , etc. I understand from https://help.github.com/articles/searching-code/#considerations-for-code-search that these characters are wildcards and have to be escaped, otherwise they will be ignored. Here's an example: "if \(done is True\)", and another: "if (done is True)". Both return the same "your query contains a character that is ignored" warning on the right side of the search bar. My

问题 I want to use a data structure for sorting space-time data (x,y,z,time). Currently a processing algorithm searches a set of 4D (x,y,z,time) points, given a spherical (3d) spacial radius and a linear (1d) time radius, marking for each point, which other points are within those radii. The reason is that after processing, I can ask any 4D point for all of its neighbours in O(1) time. However in some common configurations of space and time radii, the first run of the algorithm takes about 12

问题 I want to use a data structure for sorting space-time data (x,y,z,time). Currently a processing algorithm searches a set of 4D (x,y,z,time) points, given a spherical (3d) spacial radius and a linear (1d) time radius, marking for each point, which other points are within those radii. The reason is that after processing, I can ask any 4D point for all of its neighbours in O(1) time. However in some common configurations of space and time radii, the first run of the algorithm takes about 12

问题 I need a way of storing sets of arbitrary size for fast query later on. I'll be needing to query the resulting data structure for subsets or sets that are already stored. === Later edit: To clarify, an accepted answer to this question would be a link to a study that proposes a solution to this problem. I'm not expecting for people to develop the algorithm themselves. I've been looking over the tuple clustering algorithm found here, but it's not exactly what I want since from what I understand

问题 I am attempting to optimize a std::vector "search " - index based iterating through a vector and returning and element that matches a "search" criteria struct myObj { int id; char* value; }; std::vector<myObj> myObjList; create a few thousand entries with unique id 's and values and push them to the vector myObjList . What is the most efficient way to retrieve myObj that matches the id . Currently I am index iterating like: for(int i = 0; i < myObjList.size(); i++){ if(myObjList.at(i).id ==

问题 Is there a way to search, from a string, a line containing another string and retrieve the entire line? For example: string = qwertyuiop asdfghjkl zxcvbnm token qwerty asdfghjklñ retrieve_line("token") = "token qwerty" 回答1: you mentioned "entire line" , so i assumed mystring is the entire line. if "token" in mystring: print mystring however if you want to just get "token qwerty", >>> mystring=""" ... qwertyuiop ... asdfghjkl ... ... zxcvbnm ... token qwerty ... ... asdfghjklñ ... """ >>> for

问题 Over the course of my coding, I have come across a problem as follows: Find the a region of fixed size in a 2D space that has the highest density of particles. The particles can be considered generally distributed randomly over the entire space, but in theory there should be some areas that have a higher density. For example, 100 particles are placed randomly in a 2D grid that is 500x500, and I need to find the 50x50 region with the most particles (highest density). Is there some other way to

问题 When I search for a C symbol or global definition using cscope , it displays the file-names and line numbers. I would like to see the full file-paths so that I can jump to my arch specific file. For example, when searching for global definition of __switch_to on cscope build on Linux code-base, I get: Global definition: __switch_to File Line 0 process.c 297 struct task_struct *__switch_to(struct task_struct *prev, 1 switch_to.h 44 #define __switch_to(prev,next,last) do { \ 2 process.c 202