conditional-statements

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . I'm having a problem in my code that results in a run time error. To debug the code I've thrown in some cout statements to find the last location that

问题 This is part of a pine script for tradingview. On the script after '//Condition', I want an alert to generate only when the condition changes from long to short or short to long. Not the end of each candle as it does now, as one condition is always true. This has been changed to a study. threshold = input(title="Threshold", type=float, defval=0.0014, step=0.0001) buying = l3_0 > threshold ? true : l3_0 < -threshold ? false : buying[1] ///// T edit selling = l3_0 > -threshold ? true : l3_0 <

问题 Here is my complex (atleast i think it is complex) condition to find competitors from matches schedules and relating to events. Now I have HTBTM relations with events_competitors table, where multiple events have multiple competitors users entries. Here, I have used joins condition for joining and getting related events with competitors which works fine, but I also want to apply additional conditions, for is_black (check for black belt) and is_adult (check for adult person) 'EventCompetitor

问题 After a "long way" with Google, Searching and many tries: I created a lib.variable for the current Page: lib.currentPage = TEXT lib.currentPage.data = page:uid If I debug it in my FluidTemplate in the Frontend with: Testing currentPage: <f:cObject typoscriptObjectPath="lib.currentPage" /> I got the correct value. Now I want to use that Variable in a Condition in my pageSetup.ts like follows: [DB:pages:lib.currentPage:backend_layout = pagets__pagelayout_logoclaim_subpage] page.includeJSFooter

问题 This has been updated to clarify the question so it can better help others in the future. I am attempting to use an if statement to test if the key classes exists in a JSON structure using Python. to check if a key exists in a JSON structure using Python. I am able to get the key but need help finding out what the condition should be to check if it exists. I successfully was able to return the value of the key class when it is exsits in the JSON structure using the following code: #Parameter:

问题 I am attempting to trace the execution of a piece of code that contains a for loop with two if conditionals . But I need help understanding exactly how for loops are executed in python. Please consider the following example: numAs = 0 numEs = 0 aStr1 = 'abcdefge' def someFunc(aString): 1. for i in range(len(aString)): 2. if s[i] == 'a': 3. numAs += 1 4. continue 5. if s[i] == 'e': 6. numEs += 1 7. if numEs > numAs: 8. break 9. print(someFunc(aStr1)) Question: Using aStr as a parameter how

问题 I would like to find rows in which defined number appear (for example 2) for first time? For example: group <- c("a", "a", "a", "a", "a", "b", "b", "b", "b", "b") value <- c(1, 1, 2, 2, 1, 1, 2, 1, 2, 3) GOAL <- c("FALSE", "FALSE", "TRUE", "FALSE", "FALSE", "FALSE", "TRUE", "FALSE", "FALSE", "FALSE") data <- data.frame(group, value, GOAL) data In the column "GOAL" would be the result. Thank you for your help in advance. 回答1: This way assumes each group has at least one 2. Although your sample

问题 I'm processing strings, and I came across the Regex or Wildcard answer: that one can put regular expressions in a when statement with a custom class that overrides equals. While this does effectively use the type system to shoehorn syntactic sugar into the when statement, I find the following pretty ugly, and would never do this in code that I intend to share with another developer (quoting travis): import kotlin.text.regex when (RegexWhenArgument(uri)) { Regex(/* pattern */) -> /* do stuff *

问题 I've built an installer with WIX and have packaged it with the .NET 4.0 framework using the GenerateBootstrapper task. Now .NET 4.0 cannot be installed on XP SP2, but it appears to have no precondition check for this so its installer fails halfway through. I'd like to add my own check to make sure the OS that the entire package is being installed on is supported by the .NET 4.0 framework. Is there a way to embed an OS/Service Pack check in the bootstrapper when you use GenerateBootstrapper ?

问题 I have a list of Futures and I want to get the first one completed with a certain condition. Here is an example of a possible code: val futureList: Future[List[T]] = l map (c => c.functionWithFuture()) val data = for { c <- futureList }yield c data onSuccess { case x => (x filter (d=> d.condition)).head } But it's not efficient, because I'll take only one element of the list, but computed all of them with a lot of latency. I know firstCompletedOf but it's not what I'm searching. (Sorry for my