conditional-statements

问题 How can I set in Jmeter the conditions to establish that a sample has been a success or a failure according to its response time? For example making Jmeter to consider that a sample with a response time above 10000 milliseconds is a fail and a sample with a response time under 10000 milliseconds is a success. 回答1: Add Duration Assertion as a child to the sampler in which you want to assert the response times. In Duration in milliseconds field, add value 10000 . 回答2: Below code will work in

问题 I am with Confuse with Condition .. global $db; $sql = " SELECT * FROM TEST"; $dbc = mysqli_query($db,$sql) if (!$sql || mysqli_num_rows($dbc) == 0) { // rollback - Transaction } or if (!$sql && mysqli_num_rows($dbc) == 0){ // rollback - Transaction } should i use (!$sql || mysqli_num_rows($dbc) == 0) OR (!$sql && mysqli_num_rows($dbc) == 0) AS if $sql is true and mysqli_num_rows($dbc) == 0 ( false ) then too condition is False (roll-backed) AND if $sql is false and mysqli_num_rows($dbc) == 4

问题 I'm trying to write a program in Java that returns a letter grade when the grades for all quarters, as well as the grades for the midterms and finals are in. So far this is what it looks like: public static void main (String args[]) { System.out.println("To figure out final grade answer these questions. Use only numbers, and include decimal points where applicable"); Scanner g = new Scanner(System.in); System.out.println("What was your quarter one grade?"); int o = g.nextInt(); System.out

问题 I am needing some help with SQL syntax. Say I have a members table, a questions table and an answers table, basics of the tables are as follows: Members table: memberId: primary key Questions table: questionId: primary key, questionText:varchar Answers table: answerId: primary key, questionId: int (relating to the row of the question in the questions table) memberId: int (relating to the row of the member in the members table) answerValue:varchar The tables will have more columns but for the

问题 is there any way to write query with following functionality, add where clause as a conditional way, select e.emp_id, emp.admin_user from employees e if emp.admin != 'Y' then query run with where clause else query run without where clause ? 回答1: Using a CASE expression in the WHERE clause should do the trick. When you say you don't need the where clause if condition is not met, then all you want is a condition like WHERE 1 = 1 , i.e. when condition is not met then return all rows. So, you

问题 I am providing this example data to get my question across. aid=c(1,2,3,4,5,6,7,8,9,10) foson=c(0,1,2,0,6,9,0,0,3,0) fosof=c(0,0,2,3,0,0,0,5,0,0) data=data.frame(aid,foson,fosof) Now, I need to create a new variable (column) named data$hist with the following conditions: if foson==0 and fosof==0, then hist = 0; if foson >=1 and fosof==0, then hist = 1; if foson==0 and fosof>=1, then hist = 2; and if foson>=1 and fosof>=1, then hist = 3 I tried to use the "ifelse" function but fell short. I

问题 I know you can assign a variable in a condition like this: if ($var = $foo) However I don't need to do anything in the condition itself, so I'm often left with empty brackets. Can I simply assign $var if $foo is true in some other way without needing to do something else later? Also can I assign $var to $foo if $foo is true but if $foo is false do something else? Like: if ($var = !$foo) { if ($var = !$bar) { //Etc... } } Basically I want to have more fallbacks/defaults. 回答1: @chandresh_cool's

问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: Conditional compilation and framework targets I have some code that works in .NET 4, but it does not work in .NET 3.5. In .NET 3.5 it requires to use interop calls to Windows. I would like using a "ifdef" to use a different code path in both cases (eventually I will deprecate the .NET 3.5 code). Is there a pre-defined directive value to identify when the code is compiled with .NET 4? Is there a good link with

问题 I am trying to specify two conditions as a part of a for loop. It seems like the second condition in the second for loop is not being considered. My code runs this way: for (i in 1:nrow(mydata)) { for (j in 1:nrow(mydata) && j!=i ) { Statements.... } Statements... } Could you please tell me if this is the right Syntax in R? Thanks! 回答1: To answer your question, you need: for (i in 1:nrow(mydata)) { for (j in 1:nrow(mydata) ) { if(j != i) { Statements.... } } Statements... } However, there is

问题 I have a ranking which shows the fastest User: @users = User.find.sort { |a, b| b.finished_at <=> a.created_at } Now I hat to add some code to prevent getting an error because of finished_at beeing nil until the user finished. @users = User.find(:all, :conditions => "finished_at IS NOT NULL").sort { |a, b| b.finished_at <=> a.created_at } But sort doesn't work. Is this way of chaining methods flawed? And is find(:all, :conditions => "finished_at IS NOT NULL") the rails 3 way or outdated?