intervals

I am trying to create a Google Map where the user can plot the route he walked/ran/bicycled and see how long he ran. The GPolyline class with it’s getLength() method is very helpful in this regard (at least for Google Maps API V2), but I wanted to add markers based on distance, for example a marker for 1 km, 5 km, 10 km, etc., but it seems that there is no obvious way to find a point on a polyline based on how far along the line it is. Any suggestions? Daniel Vassallo Having answered a similar problem a couple of months ago on how to tackle this on the server-side in SQL Server 2008, I am

I'm using the expression builder to give me a calculated value. It looks like this: =DateDiff("w",Date(),[Latest_Call_Date]) However, this is giving me results as if it were doing a calculation based on weeks instead of days minus weekends . When I try the same function, but with the interval set to days (d) instead of weekdays (w) I get the expected results (but of course, including Saturdays and Sundays, which I do not wish to include in the calculation). So, for example, for everyday this week I'm getting 1,2,3,4,5 day differences but they all return zero with weekdays. That formula is:

I've got a class representing an interval. This class has two properties "start" and "end" of a comparable type. Now I'm searching for an efficient algorithm to take the union of a set of such intervals. Thanks in advance. Sort them by one of the terms (start, for example), then check for overlaps with its (right-hand) neighbor as you move through the list. class tp(): def __repr__(self): return '(%d,%d)' % (self.start, self.end) def __init__(self,start,end): self.start=start self.end=end s=[tp(5,10),tp(7,8),tp(0,5)] s.sort(key=lambda self: self.start) y=[ s[0] ] for x in s[1:]: if y[-1].end <

I'm building a chart and I want to receive data for each month. Here's my first request which is working: SELECT s.GSP_nom AS nom, timestamp, AVG( v.vote + v.prix ) /2 AS avg FROM votes_serveur AS v INNER JOIN serveur AS s ON v.idServ = s.idServ WHERE s.valide =1 AND v.date > CURDATE() -30 GROUP BY s.GSP_nom ORDER BY avg DESC But, in my case I've to write 12 request to receive data for the 12 previous months, is there any trick to avoid writing: // example for the previous month AND v.date > CURDATE() -60 AND v.date < CURDATE () -30 I heard about INTERVAL, I went to the MySQL doc but i didn't

I'm looking for some nice C code that will accomplish effectively: while (deltaPhase >= M_PI) deltaPhase -= M_TWOPI; while (deltaPhase < -M_PI) deltaPhase += M_TWOPI; What are my options? Edit Apr 19, 2013: Modulo function updated to handle boundary cases as noted by aka.nice and arr_sea: static const double _PI= 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348; static const double _TWO_PI= 6.2831853071795864769252867665590057683943387987502116419498891846156328125724179972560696; // Floating-point modulo // The result (the remainder) has same sign as

The problem I am trying to solve has a list of intervals on the number line, each with a pre-defined score. I need to return the maximum possible total score. The catch is that the intervals overlap, and of the overlapping intervals I can use only one. Here is an example. Intervals - Score 0- 5 - 15 4- 9 - 18 10-15 - 12 8-21 - 19 25-30 - 25 Here, the intervals 0-5, 4-9 and 8-21 overlap. The intervals 10-15 and 8-21 also overlap. The maximum sum would be 55 (18+12+25). It is important to note here that we select the interval 4-9 of the first batch of overlapping intervals even though it does