while-loop

How to simulate while loop in Jinja2

由 半城伤御伤魂 提交于 2019-12-07 04:35:52
问题 How would I do the following in jinja2: while apples < oranges: # some work here. According to http://jinja.pocoo.org/docs/dev/extensions/#loop-controls, and by the error I am getting, Jinja2 does not support while loops. The question is I want to continuously do some work as long as the value of apples is less than that of oranges Thanks for any help. Also something equivalent to while True: is good also. 回答1: To loop in Jina2 you have to use : for. To end the loop in the for block you can

Table variables inside while loop not initializing everytime : SQL Server

由 风格不统一 提交于 2019-12-07 04:10:20
问题 I am wondering why the table variables inside while loop does not behave like other variables. Table variables created only once and will be used across through out whole looping. but other variables getting initialized every time when loop increases. Check out the below code for more info declare @tt int set @tt =10 while @tt>0 begin declare @temptable table(id int identity(1,1),sid bigint) insert into @temptable select @tt union all select @tt + 1 select * from @temptable --delete from

Check for class in element in while loop in javascript

由 给你一囗甜甜゛ 提交于 2019-12-07 03:02:26
*This has to be done in javascript, not jQuery. What I'm trying to do is grab the innerText of the h4 tag when <a> with the class btn-blue is clicked. I realize that I could do: element.parentElement.previousElementSibling.children[0].innerText; but I'm really wanting something more flexible. This is what I have so far, and it does work when I run it in the console (chrome), but as soon as I add it to the site, it doesn't pull in the innerText of the h4 tag. HTML <div class="border-box clearfix"> <div class="blah"> <h4>h4 Title</h4> <p>paragraph</p> </div> <div class="head clearfix"> <h4>h4

My cin is being ignored inside a while loop

由 匆匆过客 提交于 2019-12-07 02:26:45
问题 I am trying to code a simple question and number checker into my first C++ program. Problem is, when I type a string like one two, or three, the program becomes and infinite loop and it ignores the cin function to re-assign lives to a number. cout << "How many lives would you like 1 (hard), 2 (medium), or 3 (easy)?" << endl; cin >> lives; while(lives != 1 && lives != 2 && lives != 3 && !isdigit(lives)) { cout << "You need to input a number, not words." << endl; cout << "How many lives would

Please code review my sample Python program [closed]

由 寵の児 提交于 2019-12-07 02:02:52
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 6 years ago . I'm still learning Python as I want to teach the essential concepts of the language to eleven year old kids (I work as a teacher). We have done a bit of

PHP - Multiple while($row = mysql_fetch_array($variable)) { } ERRORS

由 不羁岁月 提交于 2019-12-07 00:37:21
问题 Okay my syntax can probably be described without the code. Basically it should be easy...but never is. I have 2 loops in a row...basically the same thing. I SELECT * every variable from my database, and then I need to build a 2 layer javascript based on two sep. variables. So I have: while ($row = mysql_fetch_array($myVariable)) { // do events } then after that while ($row2 = mysql_fetch_array($myVariable)) { // do events } For some reason it's completely returning NOTHING on the second one..

How to loop in a GDB script till program is finished?

由 ☆樱花仙子☆ 提交于 2019-12-06 23:48:52
问题 define traverse while(CONDITION) if $start == 0 set $start = 1 print_node print_rss_item else continue print_node print_rss_item end end end What condition do I need to stop the loop if the program is finished? 回答1: Looking at your gdb script: define traverse while(CONDITION) if $start == 0 set $start = 1 print_node print_rss_item else continue print_node print_rss_item end end end Several things to note: The gdb script (so called "debugger") and debuggee are always operating in a toggling

Why would C get stuck halfway through a while loop?

由 我怕爱的太早我们不能终老 提交于 2019-12-06 23:30:43
问题 When I compile and run this code (it's part of a much larger program), Linux gets halfway through the while loop, then simply stops working. The code below prints time: 0 and then hangs, doing nothing else until I suspend the process. Why on earth would it print time: 0 but not the following line of sanity check? while (i < 5) { printf("time: %d\n",elapsedTime); printf("sanity check"); foo(); i++; } 回答1: Output usually is buffered and only written after a flush or newline. In printf("sanity

Is it possible to declare a variable within a Java while conditional?

由 好久不见. 提交于 2019-12-06 23:07:10
问题 In Java it is possible to declare a variable in the initialization part of a for -loop: for ( int i=0; i < 10; i++) { // do something (with i) } But with the while statement this seems not to be possible. Quite often I see code like this, when the conditional for the while loop needs to be updated after every iteration: List<Object> processables = retrieveProcessableItems(..); // initial fetch while (processables.size() > 0) { // process items processables = retrieveProcessableItems(..); //

Looping through results in mysqli

由 扶醉桌前 提交于 2019-12-06 20:50:43
问题 I am new to mysqli and having a problem looping through results with mysqli. Unfortunately, I am only getting a single result. When I put the query into phpMyAdmin, it comes up with three results. I believe the relevant code is here and that I am just calling it wrong: $connection = new mysqli($host, $databaseUsername, $databasePassword, $database); if ($connection->connect_errno > 0) { die ('Unable to connect to database [' . $connection->connect_error . ']'); } $sql = "SELECT clientId,
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