conditional-statements

问题 How to wait x seconds or until a condition becomes true? The condition should be tested periodically while waiting. Currently I'm using this code, but there should be a short function. for (int i = 10; i > 0 && !condition(); i--) { Thread.sleep(1000); } 回答1: Assuming you want what you asked for, as opposed to suggestions for redesigning your code, you should look at Awaitility. For example, if you want to see if a file will be created within the next 10 seconds, you do something like: await()

问题 How to wait x seconds or until a condition becomes true? The condition should be tested periodically while waiting. Currently I'm using this code, but there should be a short function. for (int i = 10; i > 0 && !condition(); i--) { Thread.sleep(1000); } 回答1: Assuming you want what you asked for, as opposed to suggestions for redesigning your code, you should look at Awaitility. For example, if you want to see if a file will be created within the next 10 seconds, you do something like: await()

问题 How to wait x seconds or until a condition becomes true? The condition should be tested periodically while waiting. Currently I'm using this code, but there should be a short function. for (int i = 10; i > 0 && !condition(); i--) { Thread.sleep(1000); } 回答1: Assuming you want what you asked for, as opposed to suggestions for redesigning your code, you should look at Awaitility. For example, if you want to see if a file will be created within the next 10 seconds, you do something like: await()

问题 In my React Native app, I'm trying to conditionally render a <Text> component based on whether or not a particular string exists. I tried to do it this way: <View> { someString && <Text> {someString} </Text> } </View> This threw the error Text strings must be rendered within a <Text> component . I did it this way and it worked fine. <View> { someString ? <Text> {someString} </Text> : null } </View> I assume the problem is that with the first method, it's trying to actually render the string,

问题 I would like to add some conditional statements in the GEKKO code. I added the below statement with 'm.if3'. However, it has returned syntax error that I didn't have without the conditional statement. 'R1_1 = m.if3(R1<0, 0, R1)' #%% GEKKO m = GEKKO(remote=False) #print(m.version) #m.time = np.linspace(0, 3600, 100) m.time = np.array([0,tstep]) cH = m.CV(value=cs0[0]) cM = m.CV(value=cs0[1]) cW = m.CV(value=cs0[2]) cF = m.CV(value=cs0[3]) R1_1 = m.Var() r3 = m.Intermediate(r0*(1-cF/cFeMax)**(1

问题 db.main.aggregate([ { $lookup: { from: "history", localField: "history_id", foreignField: "history_id", as: "History" } }, { $project: { "History": { $filter: { input: "$History", as: "his", if: { $eq: [ "5e4a8d2d3952132a08ae5764", "$$his.user_id" ] }, then: { cond: { $and: [ { $lt: [ "$$his.date", "$date" ] }, { $eq: [ "5e4a8d2d3952132a08ae5764", "$$his.user_id" ] } ] } }, else: {} } }, data: 1, history_id: 1, sender_id: 1, text: 1, date: 1 } }, { $unwind: "$History" } ]) MongoPlayground

问题 Following the previous two questions: removing the first 3 rows of a group with conditional statement in r Assigning NAs to rows with conditional statement in r I'm having some troubles with my code. If Instead of deleting rows, I want to assign NAs to every event that has in their first row a Value higher than 2. So, if an event is having in its first row a Value higher than 2, I want to assign NA to that row, and to the coming two rows of that event. If the event has no more rows, just

问题 Following the previous two questions: removing the first 3 rows of a group with conditional statement in r Assigning NAs to rows with conditional statement in r I'm having some troubles with my code. If Instead of deleting rows, I want to assign NAs to every event that has in their first row a Value higher than 2. So, if an event is having in its first row a Value higher than 2, I want to assign NA to that row, and to the coming two rows of that event. If the event has no more rows, just

问题 I'd like to have something like this: SomeAbsClass.getSomething<IMyType>("IMyType"); So, how to I code getSomething 's parameter so it'll only accept the exact "IMyType" as string? There's something to do with Conditional types, in the same vein as this, but I can't figure it out. 回答1: There's no inherent relationship in TypeScript between string literal types (like "IMyType" ) and the names of named types (like IMyType ). String literal types represent actual string values which exist at

问题 How to transform the data using $if $else groupby condition MongoDB? This playground should return two object who belongs to text with "tester 2" and "tester 3" also if I have multiple object in history collection it should also check with last object not will all object how it is possible So condition should say if history's date is $gt then main collection should return nothing else return the matched criteria data. db.main.aggregate([ { $lookup: { from: "history", localField: "history_id",