if-statement

问题 I am using a Robocopy command on a Windows Server 2003 server to copy a series of EDB files to special folders from user workstations onto a server. I want to run the robocopy commands twice, once in the mid-morning and once in the afternoon. The way I KNOW how to do this would be to write two independent batch files that are scheduled to run at different times. Each batch would copy the EDBs to different directories. But it occurred to me I should be able to do this in one batch file by:

问题 Working on my first Wordpress site so I'm sure this is a really basic question. I'm struggling to write a conditional php statement that performs a certain action when a page is a child of a parent page. For example, rather than just specifying one page, as below, I'd like to specify all pages that have the 'About Us' page as a parent: <?php if (is_page('About Us')) echo 'Hello World!'; ?> I've tried the "child_of" function but it wasn't as straightforward as I'd hoped. When I use the below,

问题 I am trying to run SELECT queries in PL/pgSQL IF statements using the code below: DO $do$ DECLARE query_type real; arr real[] := array[1]; BEGIN IF query_type = 1 THEN RETURN QUERY SELECT "Westminster".* FROM "Westminster" WHERE ("Westminster".intersects = false AND "Westminster".area <= 100); ELSE IF query_type = 0 THEN RETURN QUERY SELECT "Westminster".* FROM "Westminster"; END IF; END $do$ However I get the following error, ERROR: cannot use RETURN QUERY in a non-SETOF function . Does

问题 I am trying to run SELECT queries in PL/pgSQL IF statements using the code below: DO $do$ DECLARE query_type real; arr real[] := array[1]; BEGIN IF query_type = 1 THEN RETURN QUERY SELECT "Westminster".* FROM "Westminster" WHERE ("Westminster".intersects = false AND "Westminster".area <= 100); ELSE IF query_type = 0 THEN RETURN QUERY SELECT "Westminster".* FROM "Westminster"; END IF; END $do$ However I get the following error, ERROR: cannot use RETURN QUERY in a non-SETOF function . Does

问题 I have an if statement followed by several else if statements. All of the if/else if statements have an argument structured something like this: if (100 <= x <= 149) //do this else if (150 <= x <= 199) //do that else if ...etc... However, for some reason only the first if statement ever gets executed. X can be 200 and only the first if statement will be recognized. I'm not sure why it isn't moving on to the next else if statement when X doesn't fit the argument of the preceding statement.

问题 I have a C++ program where in many different .cpp files, I do the something like this: if (!thing1.empty() && !thing2.empty()) { if (thing1.property < thing2.property) return func1(); else if (thing2.property < thing1.property) return func2(); else return func3(); } else if (!thing1.empty()) { return func1(); } else if (!thing2.empty()) { return func2(); } else { return func4(); } I'm trying to do func one way if thing1 is bigger than thing2, or backwards if the opposite is the case, but if

问题 Im trying to write a nested if statement like this pseudo code : =IF(h4=1, "CORRECT", IF(h4=2, "CORRECT"), IF(h4=3, "CORRECT"), IF(h4=4, "CORRECT")) But im getting the following error, if i write out the code about and add an if statement each time. ie. start with only the first if block and then add more testing each time, it breaks when i add the third statement. Wrong number of arguments to IF. Expected between 2 and 3 arguments, but received 4 arguments. Is there a better way to nest if

问题 I have the following if, else if, else construct and I am just curious how I could convert such as construct into a switch statement. var emailSubject = email.subject.toLowerCase(); if(emailSubject.indexOf("account request") >= 0){ //do acct req }else if(emailSubject.indexOf("accounts pending removal for") >= 0){ //do account removal }else if(emailSubject.indexOf("listserv application") >= 0){ //do listserv app }else if(emailSubject.indexOf("student organization webmaster transfer request") >

问题 This is probably a simple question however I am new to R and couldn't find an answer (or was googling the wrong thing). I am currently working on a project which involves deleting all Time values that are less than 5 minutes. An example of the data is as follows with the times created using the "lubridate" package. Time 19S 1M 24S 7M 53S 11M 6S . . . Now I wish to delete all values which are less than 5 minutes. Therefore the final dataset I wish to get is: Time 7M 53S 11M 6S . . . Any help

问题 I'm writing a condition check for a simple input via prompt() in JavaScript. The idea is to repeat a prompt until the user supplies a positive integer. In particular, if I submit a negative integer, it correctly prompts me again via case 3. However, if I answer the second prompt again with a negative integer, the code unexpectedly leaves the while loop. In the if statement: Case 1: checks if the user 'cancels' the prompt box (or returns an empty string), in which case I set a variable