lambda

问题 I was trying to understand how reduce works through this website. The example they have mentioned is quite good and easy to understand. http://book.pythontips.com/en/latest/map_filter.html#reduce a = reduce((lambda x, y: x * y), [1, 2, 3, 4]) The above function will multiple each and every number in list and assign to a . However, I got totally stumped when I came across following function in project. def compose(*fns): return reduce(lambda acc, fn: lambda *args: acc(fn(*args)), fns, lambda _

问题 I have an Arabic string with English text and punctuations. I need to filter Arabic text and I tried removing punctuations and English words using sting. However, I lost the spacing between Arabic words. Where am I wrong? import string exclude = set(string.punctuation) main_text = "وزارة الداخلية: لا تتوفر لدينا معلومات رسمية عن سعوديين موقوفين في ليبيا http://alriyadh.com/1031499" main_text = ''.join(ch for ch in main_text if ch not in exclude) [output after this step="وزارة الداخلية لا

问题 I want to simply pass a lambda (chunk of code) and execute it when I need to. How do I implement the method executeLambda(...) in the code below (as well what is the method signature): public static void main(String[] args) { String value = "Hello World"; executeLambda(value -> print(value)); } public static void print(String value) { System.out.println(value); } public static void executeLambda(lambda) { someCode(); lamda.executeLambdaCode(); someMoreCode(); } 回答1: Your lambda takes one

问题 I want to simply pass a lambda (chunk of code) and execute it when I need to. How do I implement the method executeLambda(...) in the code below (as well what is the method signature): public static void main(String[] args) { String value = "Hello World"; executeLambda(value -> print(value)); } public static void print(String value) { System.out.println(value); } public static void executeLambda(lambda) { someCode(); lamda.executeLambdaCode(); someMoreCode(); } 回答1: Your lambda takes one

问题 I want to simply pass a lambda (chunk of code) and execute it when I need to. How do I implement the method executeLambda(...) in the code below (as well what is the method signature): public static void main(String[] args) { String value = "Hello World"; executeLambda(value -> print(value)); } public static void print(String value) { System.out.println(value); } public static void executeLambda(lambda) { someCode(); lamda.executeLambdaCode(); someMoreCode(); } 回答1: Your lambda takes one

问题 My application works with loading dll's dynamically, based on settings from the database (file, class and method names). To facilitate, expedite and reduce the use of reflection I would like to have a cache.... Following the idea that using: MethodInfo.Invoke Is nothing performative ( Reflection Performance - Create Delegate (Properties C#)) I would like to translate any call to methods. I thought of something that would work like this: public static T Create<T>(Type type, string methodName)

问题 Consider the following: void test( const int &value ) { auto testConstRefMutableCopy = [value] () mutable { value = 2; // compile error: Cannot assign to a variable captured by copy in a non-mutable lambda }; int valueCopy = value; auto testCopyMutableCopy = [valueCopy] () mutable { valueCopy = 2; // compiles OK }; } Why is the first version a compile error when I've declared the lambda as mutable and captured value by value (which I thought made a copy of it)? Tested with clang (x86_64-apple

问题 How do I build an Action action in a loop? to explain (sorry it's so lengthy) I have the following: public interface ISomeInterface { void MethodOne(); void MethodTwo(string folder); } public class SomeFinder : ISomeInterface { // elided } and a class which uses the above: public Map Builder.BuildMap(Action<ISomeInterface> action, string usedByISomeInterfaceMethods) { var finder = new SomeFinder(); action(finder); } I can call it with either of these and it works great: var builder = new

问题 How do I build an Action action in a loop? to explain (sorry it's so lengthy) I have the following: public interface ISomeInterface { void MethodOne(); void MethodTwo(string folder); } public class SomeFinder : ISomeInterface { // elided } and a class which uses the above: public Map Builder.BuildMap(Action<ISomeInterface> action, string usedByISomeInterfaceMethods) { var finder = new SomeFinder(); action(finder); } I can call it with either of these and it works great: var builder = new

问题 How do I build an Action action in a loop? to explain (sorry it's so lengthy) I have the following: public interface ISomeInterface { void MethodOne(); void MethodTwo(string folder); } public class SomeFinder : ISomeInterface { // elided } and a class which uses the above: public Map Builder.BuildMap(Action<ISomeInterface> action, string usedByISomeInterfaceMethods) { var finder = new SomeFinder(); action(finder); } I can call it with either of these and it works great: var builder = new