increment

问题 I am trying to increment the count of a row in an SQLite database if the row exists, or add a new row if it doesn't exist the way it is done in this SO post. However I'm getting some weird behavior when I try to execute this SQL proc many times in quick succession. As an example I tried running this code: db = connect_to_db() c = db.cursor() for i in range(10): c.execute("INSERT OR REPLACE INTO subject_words (subject, word, count) VALUES ('subject', 'word', COALESCE((SELECT count + 1 FROM

问题 The for loop fails because "$" is an invalid variable character: <?php $num1 = "Number 1"; $num2 = "Number 2"; $num3 = "Number 3"; for ($i = 0; $i < 3; $i++) { echo $num$i . "<br>"; } ?> (I didn't understand this question) 回答1: $num1 = "Number 1"; $num2 = "Number 2"; $num3 = "Number 3"; for ($i = 1; $i <=3; $i++) { $num = 'num' . $i; echo ${$num} . "<br>"; } But using array is simpler: $nums = array("Number 1", "Number 2","Number 3"); for ($i = 0; $i <3; $i++) { echo $nums[$i] . "<br>"; } 回答2

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . I am creating an incrementing number starting with 1001. If the number goes 1001,1002,1003... when it reaches 10, will it be formatted like 1010 or will it be 10010? I need it to just go in order and be 1010 and when it reaches 100, 1100. $prefix = "1"; // update the prefix here $number = 1;

问题 Using BASH I want to loop from a start to end date at ten-minute intervals. I tried begin_date="2015-01-01 00:00:00" end_date="2015-02-20 00:00:00" d=$begin_date while [ "$d" != "$end_date" ]; do echo $d d=$(date -d "${d} + 10 min" +"%Y-%m-%d %H:%M") done But it didn't work. Looking at Bash:Looping thru dates #This works d=$(date -I -d "${d} + 1 day") #This doesn't work d=$(date -d "${d} + 1 day" +"%Y-%m-%d") What am I missing in the format string? 回答1: The example you linked to just needs to

问题 I'm not sure how to phrase the question because I don't know what's causing the problem. I think incrementing the global variable is causing the problem when it's deployed to Heroku. I have this Bot which needs to ask questions in a sequential way. I managed to make it work, it works fine when I test it on my machine. But, when the Bot is deployed to Heroku, It goes nuts and asks random questions and shows random facts without any order. Here's how it works question_dict = { 'Locq0':[{

问题 First of all Sorry for foolish question As i am new to java. actually i have a string which contains a number in between i want to increment its value up to some specific number. i am very confused how to explain . below is the example what i need to do. I have a string i.e :- "03000001da 00000001 666666" and i want to increase its value like below "03000001da 00000002 666666" "03000001da 00000003 666666" "03000001da 00000004 666666" etc. I wrote a simple java code below: but its print

问题 I have instances of jPlayer (jquery audio player): jPlayer1, jPlayer2, jPlayer3, jPlayer4, each initialized and preloaded with audio files. Calling function below will traverse an existing array and adding the methods that plays the preloaded audio. function addPlayAudioMethodToExerciseArray(){ for (i in qaArray){ qaArray[i].playAnswer = function(){ $('#jPlayer'+i).jPlayer('play',0);} } } It creates the method alright except for the part ('#jPlayer'+i) is not evaluated to become ('#jPlayer1')

问题 Everything works but the increment function. It can increment from 0 to 1, 1 to 2, and then from 2 it goes to "1111111111". I'm stumped. Variables: D_IN: Data in PC_OE: Active high. Drives PC_TRI output. PC_LD: Active high synchronously loads D_IN into PC. PC_INC: Active high synchronously increments value in PC. RST: Active high asyncronous reset. PC_COUNT: Current value in PC. Address. PC_TRI: Current value in the PC under tri-state control. When PC_OE = '1', PC_TRI <= PC_COUNT, else high

问题 Im running a database log and every day I log on a new row. My Mysql query therefore checks if the day (date (the unique key)) already exists, and if so, it tries to increment all the loggable values of the log-row by one. If the date record doesnt eyist yet, it will create a new row. My SQL query is: INSERT INTO `log` (`date`,`hits`,`stale`) VALUES ('2012-03-06',1,1) ON DUPLICATE KEY UPDATE `hits`=`hits`+1,`stale`=`stale`+1 WHERE `date`='2012-03-06';" All columns have 0 as default value, so

问题 The assignment I am working on requires me to build an interface that controls and tracks a train. I used an array of strings to hold on the stations. I then tried using a JTextField to display the station the train is currently at. Whenever the train leaves station, I wanted a counter 'journey' to increment so that the next station would display. However, it's not working. I'm assuming that the problem isn't to do with the variable not incrementing but rather the JTextField not updating, but