control-flow

问题 Can anyone assist me with an alternative to if then else statements for control flow? Or advise on a good article? From what I've seen, some use mapping or enums. Trouble I'm having is that I have multiple conditions i.e. if (condition1 && condition2 && condition3)... and I need to do this for several permutations and all 3 variables need to be validated. Please can someone point me in the right direction? else if (String.Utils.isNotEmpty(payload.getKeyChange2TokenNumber()) && String.Utils

问题 Can anyone assist me with an alternative to if-then-else statements for control flow? Or advise on a good article? From what I've seen, some use mapping or enums. Trouble I'm having is that I have multiple conditions i.e. if (condition1 && condition2 && condition3)... and I need to do this for several permutations and all 3 variables need to be validated. Please can someone point me in the right direction? else if (String.Utils.isNotEmpty(payload.getKeyChange2TokenNumber()) && String.Utils

问题 I am trying to check if a word has a trailing semicolon. I have the position of the word within a long string, and I want to check if the character at the position start of word + length of word is a : . It can be that the word is the last word in the string, and therefore trying to get the next char will raise an IndexException I have three ideas: 1) Check that we are not at the end of the string, and then check that it is not semicolon semicolon_pos = pos_word + len(word) # Possible

问题 My codes allows the user to enter in a score from 1 to 100, which will either tell them that the score is "Good", "OK", "Moron", or "Invalid". But, when I compile these codes. The output has invalid in it too with the correct statement if it is more than 54. For example : if I enter in 55 it will say "OK" AND "Invalid". if I enter in 54 it will just say "Moron". Here are my codes: #define _CRT_SECURE_NO_WARNINGS #include<stdio.h> #include<stdlib.h> void main() { int score; printf("Enter a

问题 I am drawing control-flow graphs for Python programs and would like to influence which kind of edges should not be crossed over. Is there a way to do this? Consider this simple Python program: try: a += 1 except: a += 2 else: a = 3 And a dot program to represent the control flow for that generated via https://github.com/rocky/python-control-flow/ digraph G { mclimit=1.5; rankdir=TD; ordering=out; graph[fontsize=10 fontname="Verdana"]; color="#efefef"; node[shape=box style=filled fontsize=8

问题 I'm trying to figure out how to implement my LEParserCfgVisitor class as to build a control-flow graph from an Abstract-Syntax-Tree already generated with JavaCC. I know there are tools that already exist, but I'm trying to do it in preparation for my Compilers final. I know I need to have a data structure that keeps the graph in memory, and I want to be able to keep attributes like IN, OUT, GEN, KILL in each node as to be able to do a control-flow analysis later on. My main problem is that I

问题 If I’ve got a bunch of chained guard let statements, how can I diagnose which condition failed, short of breaking apart my guard let into multiple statements? Given this example: guard let keypath = dictionary["field"] as? String, let rule = dictionary["rule"] as? String, let comparator = FormFieldDisplayRuleComparator(rawValue: rule), let value = dictionary["value"] else { return nil } How can I tell which of the 4 let statements was the one that failed and invoked the else block? The

问题 If I’ve got a bunch of chained guard let statements, how can I diagnose which condition failed, short of breaking apart my guard let into multiple statements? Given this example: guard let keypath = dictionary["field"] as? String, let rule = dictionary["rule"] as? String, let comparator = FormFieldDisplayRuleComparator(rawValue: rule), let value = dictionary["value"] else { return nil } How can I tell which of the 4 let statements was the one that failed and invoked the else block? The

问题 When I don't use queues, I like to tally the loss, accuracy, ppv etc during an epoch of training and submit that tf.summary at the end of every epoch. I'm not sure how to replicate this behavior with queues. Is there a signal I can listen to for when an epoch is complete? (version 0.9) A typical setup goes as follows: queue=tf.string_input_producer(num_epochs=7) ...#build graph#... #training try: while not coord.should_stop(): sess.run(train_op) except: #file has been read num_epoch times #do

问题 I have an IEnumerable<T>. I want to do one thing for each item of the collection, except the last item, to which I want to do something else. How can I code this neatly? In Pseudocode foreach (var item in collection) { if ( final ) { g(item) } else { f(item) } } So if my IEnumerable were Enumerable.Range(1,4) I'd do f(1) f(2) f(3) g(4). NB. If my IEnumerable happens to be length 1, I want g(1). My IEnumerable happens to be kind of crappy, making Count() as expensive as looping over the whole