set

问题 I have seen some some projects in which classes are having get and set methods to manipulate insert data. Let me have an example here : class Student extends dbClass { private $TableID; private $FullName; private $Gender; private $Address; function setTableID($Value) { $this->TableID = $Value; } function getTableID() { return $this->TableID; } function setFullName($Value) { $this->FullName = $Value; } function getFullName() { return $this->FullName; } function setGender($Value) { $this-

问题 I have several arrays in the form: private static String[] patientNames = { "John Lennon", "Paul McCartney", "George Harrison", "Ringo Starr" }; Then I make a TreeSet like this: TreeSet<Patient> patTreeSet = new TreeSet<Patient>(); Where Patient is a different class that makes "Patient" objects. Then I loop through each element in my arrays to create several patients and add them to my patTreeSet like this: for(int i = 0; i< patientNames.length; i++){ Date dob = date.getDate("MM/dd/yyyy",

问题 So basically I have a map that looks like this HashMap<Integer, HashMap<String, Integer>> girls = new HashMap<Integer, HashMap<**String**, Integer>>();' and I want to return the bolded string and this is my method so far public String getGirlName(int year, int rank) { //year refers to Key //rank refers to other integer in value map if (girls.containsKey(year) && girls.get(year).containsKey(rank)){ //shouldn't this return the name return girls.get(year).get(rank); //error here where it says I

问题 I have implemented a set datatype in javascript based in a generic object type, like this: function createSetFromList(list) { var set = { }; for (var i = 0; i < list.length; i++) set[list[i]] = true; return set; } Now I can easily check whether a given value belongs to the set: var users = createSetFromList(my_users); if (user in users) allow_operation = true; The problem that I have is that I would like to check if my set is empty, like this: if ("users is empty" or user in users) allow

问题 This question already has answers here : Why is the order in dictionaries and sets arbitrary? (6 answers) Closed 5 years ago . I have two questions about sets. 1. So as I read sets are unordered, but when I started experimenting with them I found out that actually there is some kind of ordering thing. As you can see, there is nothing special in this set: >>> v_set ={88,11,1,33,21,3,7,55,37,8} >>> v_set {33, 1, 3, 37, 7, 8, 11, 21, 55, 88} But this one is different: >>> g_set={7,5,11,1,4,13,55

问题 This question already has answers here : Why is the order in dictionaries and sets arbitrary? (6 answers) Closed 5 years ago . I have two questions about sets. 1. So as I read sets are unordered, but when I started experimenting with them I found out that actually there is some kind of ordering thing. As you can see, there is nothing special in this set: >>> v_set ={88,11,1,33,21,3,7,55,37,8} >>> v_set {33, 1, 3, 37, 7, 8, 11, 21, 55, 88} But this one is different: >>> g_set={7,5,11,1,4,13,55

问题 trying to look up files in directories with wildcard *, and put the names into an array the files have similar names (MATCHr1, MATCHr2 ... ) the problem arises when the file does not exist (which is a possibility) set command returns a "no match" error and terminates the loop if this happens how can i get it handle the error by jumping to the next iteration? set SUBIDS = (10003 10005 10006) foreach SUBID ($SUBIDS) foreach SEQR ( MATCH ENC NBACK SIMON FACE ) ls -l *${SEQR}*.nii.gz set Array =

问题 If I have a number of structs that I want to store: type Stuff struct { a string b string } I can do it with a slice, but it seems like it would use less memory to use a proper set structure. Unfortunately Go doesn't have a set structure. Everyone recommends using map[Stuff]struct{} but that doesn't work because Stuff is a struct. Anyone have any good solutions? Ideally without having to download a library. 回答1: Usually set and map data structures require more memory than storing a list of

问题 I am using Python 2.7. I have routes which are composed of arrays of nodes that connect to each other. The nodes are identified by a string key, but for ease I will use numbers: sample_route = [1,2,3,4,7] #obviously over-simplified; real things would be about 20-40 elements long I will create a set made up of tuple pairs of point connections using zip, which will end up like: set([(1,2),(2,3),(3,4),(4,7)]) I will need a way to filter out some routes that are very similar (like one or two

问题 I am using Python 2.7. I have routes which are composed of arrays of nodes that connect to each other. The nodes are identified by a string key, but for ease I will use numbers: sample_route = [1,2,3,4,7] #obviously over-simplified; real things would be about 20-40 elements long I will create a set made up of tuple pairs of point connections using zip, which will end up like: set([(1,2),(2,3),(3,4),(4,7)]) I will need a way to filter out some routes that are very similar (like one or two