Relatively new to C and will readily concede there are things I think I understand, but probably don’t appreciate all the nuances. This is a MWE extracted from a more involved program I wrote. It compiles and runs fine, but testing reveals that the value of ev->pin is initially correct, but is incorrect after an… Read More What's gone wrong with the values in this struct?
I have this function in some code , i dont understand what are the double curly brackets in struct that help do decide that its not 2 jsons ? How does it work ? func readJSON(w http.ResponseWriter,r *http.Request,data interface{}) error { maxBytes := 1024 * 1024 r.Body = http.MaxBytesReader(w,r.Body,int64(maxBytes)) dec := json.NewDecoder(r.Body) dec.DisallowUnknownFields() err :=… Read More Double curly brackets in struct when using in Decode(&struct{}{})
I was training and studying the structures that are used in C, but when I was trying to create a data structure I got an issue, like that it was printing, random numbers. I think that he was printing the address of any array element in this pointer of array, but I want to know… Read More struct with a array pointer printing "random numbers" in the print_stack() function
I have two collections of animals. I want to delete from Animal1 any components that are absent from Animal2. struct Animal: Equatable{ var name: String var type: String static func ==(lhs: Animal, rhs: Animal) -> Bool { return lhs.name == rhs.name && lhs.type == rhs.type } } var animal1 = Animal(name: "tiger", type: "wild") var… Read More Remove the element of arrray which are not present in other array
I have the following struct.unpack call that fails: struct.unpack(’14x4x2i2xh8x2i’, b’\0’*46) Traceback (most recent call last): File "<pyshell#88>", line 1, in <module> struct.unpack(’14x4x2i2xh8x2i’, b’\0’*46) struct.error: unpack requires a buffer of 48 bytes I’ve added up the number of bytes required by the format multiple times, and I always come up with a total of 46 bytes.… Read More Why does struct.unpack need 2 extra bytes?
Suppose the memory address of a struct in C language is stored in a variable of sufficiently wide integer type, such as uintptr_t.I want to read the contents of struct by casting the integer to a struct pointer and dereferencing that. Can the original struct be reconstructed using this approach? >Solution : Instead of storing… Read More Dereferencing a struct in C using only its memory address
I’m trying to unpack structure as shown below in this way to get ‘0123456789’ b"\x10\x32\x54\x76\x98" Maybe there is other way then writing own function to do so ? Thanks >Solution : I think it’s easier to debug if you use your own function. However, if you want a one line command to turn this into… Read More Python struct reverse unpack
I’m struggling with this syntax: I have a few structs of arrays: struct Msg { uint8_t Data[DATA_SIZE]; }; struct Msg Msg_Buff[NUM_MESSAGES], Temp_Buff[NUM_MESSAGES]; and want to copy one array from one struct to another. This: *Temp_Buff[Other_Indx].Data = *Msg_Buff[This_Indx].Data; copies ONLY the first element of the array, not the whole array. What am I doing wrong? >Solution… Read More Copy One Struct Member to Another Struct
As we know, fields start with capital letters are public, and those are not are private. But Golang also support anonymous field. For example: type myType struct { string } These fields are design for Embedding. But is this field public or private? >Solution : If the typename of the embedded type is lower case,… Read More Is Golang struct anonymous field public or private?
I have this data model type ResponseQueryHotel struct { QueryString *string `json:"queryString"` Status string `json:"status"` Action string `json:"action"` RefCode string `json:"refCode"` Vendorid string `json:"vendorid"` SearchToken *string `json:"searchtoken"` Data struct { Hotels []struct { Data ResponseQueryHotelsData `json:"data"` } `json:"hotels"` } `json:"data"` } type ResponseQueryHotelsData struct { Hotelidvendor string `json:"hotelidvendor"` Hotelname string `json:"hotelname"` Hoteladdress string `json:"hoteladdress"` Hoteldistrict… Read More append a struct to a slice of struct in golang