tuples

问题 I'm trying to write a function that chooses the tuple with the lower value and the tuple is formed by a word and a value. For example, for a list of tuples like this one: [("CHURCH",262),("PENCIL",311),("FLOUR",175),("FOREST",405),("CLASS",105)], the function would return ("CLASS",105) Can someone help me out? :) Thank you so much! 回答1: Try this: foldl1 (\acc x -> if snd x < snd acc then x else acc) <your list> You fold your list by comparing the current element of the list to the next one.

问题 I'm trying to write a function that chooses the tuple with the lower value and the tuple is formed by a word and a value. For example, for a list of tuples like this one: [("CHURCH",262),("PENCIL",311),("FLOUR",175),("FOREST",405),("CLASS",105)], the function would return ("CLASS",105) Can someone help me out? :) Thank you so much! 回答1: Try this: foldl1 (\acc x -> if snd x < snd acc then x else acc) <your list> You fold your list by comparing the current element of the list to the next one.

问题 I am creating a loop in order to append continuously values from user input to a dictionary but i am getting this error: AttributeError: 'dict' object has no attribute 'append' This is my code so far: for index, elem in enumerate(main_feeds): print(index,":",elem) temp_list = index,":",elem li = {} print_user_areas(li) while True: n = (input('\nGive number: ')) if n == "": break else: if n.isdigit(): n=int(n) print('\n') print (main_feeds[n]) temp = main_feeds[n] for item in user: user['areas

问题 Is there a nicer way to select a named tuple in C# 7 using a var target variable? I must be doing something wrong in example 1, or misunderstanding something completely. I seem to have to explicitly set the target type in order to do this. //1. Fails to compile with "incorrect number of type parameters" issue. var tuples = source.Select<(int A, int B)>(x => (x.A, x.B)); //2. Compiles IEnumerable<(int A, int B)> tuples = toCheck.Select(x => (x.A, x.B)); //3. Compiles var tuples = new HashSet<

问题 Is there a nicer way to select a named tuple in C# 7 using a var target variable? I must be doing something wrong in example 1, or misunderstanding something completely. I seem to have to explicitly set the target type in order to do this. //1. Fails to compile with "incorrect number of type parameters" issue. var tuples = source.Select<(int A, int B)>(x => (x.A, x.B)); //2. Compiles IEnumerable<(int A, int B)> tuples = toCheck.Select(x => (x.A, x.B)); //3. Compiles var tuples = new HashSet<

问题 I was wondering if anyone could help me. Suppose I have a tuple of type (String,Int) , and a list of such tuples [("Strength",12),("Stamina",60),("Health",100)] . How can I use the function find to extract the Int value of the tuple ("Stamina",60) if I don't actually know what order the tuples are inside the list but only that a certain tuple containing the string "Stamina" exists? I tried value = snd ( find ("Stamina", _ ) stats ) where stats is the list of tuples and value is defined as

问题 I have an array containing SQL query result. I need to convert this array in tuple to make a request like this: t = tuple(data) querysring="INSERT INTO %s VALUES %s "%(table,t) cur.execute(querysring) But my array contains values like ['François','données'] and when I convert this in tuple it's make and insert 'Fran\xc3\xa7ois' in my database. I have try to decode and encode (utf-8) but it seem not working. Any suggestions ? 来源： https://stackoverflow.com/questions/43629059/encoding-in-tuple

问题 I have an array containing SQL query result. I need to convert this array in tuple to make a request like this: t = tuple(data) querysring="INSERT INTO %s VALUES %s "%(table,t) cur.execute(querysring) But my array contains values like ['François','données'] and when I convert this in tuple it's make and insert 'Fran\xc3\xa7ois' in my database. I have try to decode and encode (utf-8) but it seem not working. Any suggestions ? 来源： https://stackoverflow.com/questions/43629059/encoding-in-tuple

问题 I have a list of data and they are formated like this: (have more lines below are just part of them) 2 377222 TOYOTA MOTOR CORPORATION TOYOTA PASEO 1994 Y 19941226 N 0 0 PARKING BRAKE:CONVENTIONAL SAN JOSE CA JT2EL45U5R0 19950103 19950103 1 PARKED ON FLAT SURFACE EMERGENCY BRAKING ENGAGED VEHICLE ROLLED REARWARD. TT EVOQ V 1 958164 TOYOTA MOTOR CORPORATION TOYOTA LAND CRUISER 1994 19941223 N 0 0 SERVICE BRAKES, HYDRAULIC:ANTILOCK ARNOLD CA JT3DJ81W8R0 19950103 19950103 ABS SYSTEM FAILURE, AT

问题 I have a list of data and they are formated like this: (have more lines below are just part of them) 2 377222 TOYOTA MOTOR CORPORATION TOYOTA PASEO 1994 Y 19941226 N 0 0 PARKING BRAKE:CONVENTIONAL SAN JOSE CA JT2EL45U5R0 19950103 19950103 1 PARKED ON FLAT SURFACE EMERGENCY BRAKING ENGAGED VEHICLE ROLLED REARWARD. TT EVOQ V 1 958164 TOYOTA MOTOR CORPORATION TOYOTA LAND CRUISER 1994 19941223 N 0 0 SERVICE BRAKES, HYDRAULIC:ANTILOCK ARNOLD CA JT3DJ81W8R0 19950103 19950103 ABS SYSTEM FAILURE, AT