intervals

How to subtract 4 months from today's date?

霸气de小男生 提交于 2019-11-29 16:22:48
问题 I need to declare two dates in "Ymd" format: $toDate and $fromDate . $toDate represents today's date and $fromDate needs to be 4 months earlier than today. $toDate = Date('Ymd'); $fromDate = ? How do I create $fromDate ? 回答1: Use the magic of strtotime: $fromDate = date("Ymd", strtotime("-4 months")); 回答2: see the code below... $fourmonthsback = date("Ymd", mktime(0, 0, 0, date("m")-4, date("d"), date("Y"))); OR $fourmonthsback = mktime(0, 0, 0, date("m")-4, date("d"), date("Y")); 来源: https:/

MySQL INTERVAL Mins

只谈情不闲聊 提交于 2019-11-29 14:01:33
问题 I am trying to get the all records which are 2 hours or more old using this query: $minutes = 60 * 2 SELECT COUNT(id) AS TOTAL, job_id from tlb_stats WHERE log_time >= DATE_SUB(CURRENT_DATE, INTERVAL $minutes MINUTE) GROUP BY job_id It only selects the recent records and skips the old. When I change log_time <= ... it only selects old and skips which are the new one. What am I doing wrong? 回答1: Try: $minutes = 60 * 2 SELECT COUNT(`id`) AS `TOTAL`, `job_id` FROM `tlb_stats` WHERE `log_time` <

Auto-Interval precision in MS Chart

*爱你&永不变心* 提交于 2019-11-29 12:35:01
问题 I'm currently using the charting within .NET using System.Windows.Forms.DataVisualization.Charting.Chart . Thus far it seems very powerful, and works great. However, there is a huge problem in terms of how it is auto-calculating intervals. I use a lot of double values, and in libraries like ZedGraph, it handles this perfectly. It selects min/max/interval just fine. However, in MS Chart, it may select 206.3334539832 as a minimum, and intervals of a similar decimal precision. Obviously this

Algorithm to find maximum coverage of non-overlapping sequences. (I.e., the Weighted Interval Scheduling Prob.)

天大地大妈咪最大 提交于 2019-11-29 11:43:24
I have a question that is very similar to algorithm to find longest non-overlapping sequences . The only difference to the linked question is that instead of finding the set of non-overlapping tuples that represent the longest sequence , I need to find the set of non-overlapping tuples that represent the maximum coverage , by which I mean the sum of the tuple lengths is maximum (a tuple length being last - first + 1 given the definition of tuple in the next sentence). I represent my tuples differently than the linked problem. Instead of (starting index, length) , I represent my tuples as

jQuery change CSS after a certain amount of time

拥有回忆 提交于 2019-11-29 11:24:32
I have a navigation that, when one of it's nav items is clicked, will use jQuery to change it's z-index to 0. Then, after 2 seconds, I would like the z-index to be changed to 2. I tried using delay() but apparently that doesn't work when changing the CSS. Use a setTimeout like this $(elem).css('z-index','0'); setTimeout(function(){ $(elem).css('z-index','2'); },2000) In javascript you can use either setTimeout or setInterval to accomplish that setTimeout("javascript statement",milliseconds); http://www.w3schools.com/js/js_timing.asp 来源: https://stackoverflow.com/questions/4411644/jquery-change

Sort Intervals in Joda-Time

血红的双手。 提交于 2019-11-29 11:14:19
I have list of Joda-Time Interval objects. List<Interval> intervals = new ArrayList<Interval>(); How can I sort the intervals on the beginning Date of each interval. The intervals are not overlapping Just create a Comparator<Interval> which compares by start times: public class IntervalStartComparator implements Comparator<Interval> { @Override public int compare(Interval x, Interval y) { return x.getStart().compareTo(y.getStart()); } } Then sort using that: Collections.sort(intervals, new IntervalStartComparator()); In your special case, collect the start instants using interval.getStart() in

mysql show time slots avaliable and time slots busy from table

爷,独闯天下 提交于 2019-11-29 05:22:55
i have this table structure for bookings |ID|timeBooked | duration | |2 |2013-05-09 11:10:00| 30 | |1 |2013-05-09 14:40:00| 15 | |AI| timespan | int(4) | duration represent the duration in minutes. so what i want is to return record set like this when i query available time slots in 2013-05-09 between 00:00:00 and 23:00:00 |free_from|Free_until| Free | |00:00:00 |11:10:00 | 1 |11:10:00 |11:40:00 | 0 |11:40:00 |14:40:00 | 1 |14:40:00 |14:55:00 | 0 |14:55:00 |23:00:00 | 1 is this possible by mysql alone ? OK, pure MySQL - as long as one likes those tricks. I need a Variable which is initialized

Actual frequency of device motion updates lower than expected, but scales up with setting

我怕爱的太早我们不能终老 提交于 2019-11-29 03:48:30
I am porting an app that I originally wrote using the accelerometer for IOS 3, to incorporate the new IOS 4 motion capabilities. While capturing motion, the application does little else - no graphics updates for example. I'm doing the following to set up motion updates, as a replacement for my previous use of the accelerometer. I do realize that I could rebuild to do my own polling using NSTimer or something, and may pursue that yet. [motionManager setDeviceMotionUpdateInterval:updateInterval]; CMDeviceMotionHandler motionHandler = ^(CMDeviceMotion *motion, NSError *error) { [self

MySQL select rows from exactly 7 days ago

穿精又带淫゛_ 提交于 2019-11-29 03:06:40
I'm completely stumped on this one, being trying for hours but with no success, hoping someone can help. Trying to build a cron script to run daily that returns the rows that are exactly 7 days older than the current date. The thing is, my query is not returning anything. No error messges, nothing (I know there are entries in the DB from the last 7 days - we get about 7000 new entries a day, so they are there!) I've tried a SELECT * and echo out the edit date with success, so everything is working, apart from my SQL script. The column I'm referencing (edit_date) is type 'datetime' formated

Timing in JS - multiple setIntervals running at once and starting at the same time?

穿精又带淫゛_ 提交于 2019-11-29 02:02:37
问题 Let's say I have a function: myFunc = function(number) { console.log("Booyah! "+number); } And I want it to run on a set interval. Sounds like I should use setInterval, huh! But what if I want to run multiple intervals of the same function, all starting at the exact same time? setInterval(function(){ myFunc(1); }, 500); setInterval(function(){ myFunc(2); }, 1000); setInterval(function(){ myFunc(3); }, 2000); So that the first runs exactly twice in the time it takes the second to run once, and