record

问题 I have a data file that consists of several data points, that i would like to plot in a particular order. Here is the example data file: cop 94.0528 313 441 cpr 225.172 726 747 ent 444.786 926 939 fsh 256.038 743 754 fsp 43.7764 340 356 pbp 343.708 825 834 rho 426.497 858 886 sca 342.431 427 872 I am currently plotting those just below each other in the way i set the example. How can i change the order of those data records within my python script to a specified order? I already tried to work

问题 I know, this question was asked many times and answered as well.. But, my problem is more specific and i couldn't found a proper solution. My table (named as pages) is like that; id (int) title (text) content (text) slug (text) I need to update my record if slug ( i've converted it unique ) is same as posted. I mean i need to update/insert my record based on slug record. Eg. current data: id | title | content | slug | -------------------------------------- 1 | MainPage| some html | mainpage

问题 your valuable help needed again. I have the following code in which i am reading file contents for each file. each file is related to an individual staff. On click of a button called "show staff record", i want to show all staff file data in a GUI. but instead of all them appearing at one i want it to have navigation next and previous like in MS Access? any ideas. a code perhaps? /*********************Calculate Staff Balance***************************/ public class calcBalanceListener

问题 How in SQL could you "zip" together records in separate tables (à la the UNIX paste(1) utility)? For example, assuming two tables, A and B , like so: A B ======== ==== Harkness unu Costello du Sato tri Harper Jones How could you produce a single result set NAME | NUM =============== Harkness | unu Costello | du Sato | tri Harper | NULL Jones | NULL ? 回答1: In SQL Server 2005 , Oracle 9i and PostgreSQL 8.4 and higher: SELECT name, num FROM ( SELECT name, ROW_NUMBER() OVER (ORDER BY id) AS rn

问题 I.e, if I have a record -record(one, {frag, left}). Is record_info(fields, one) going to always return [frag, left] ? Is tl(tuple_to_list(#one{frag = "Frag", left = "Left"})) always gonna be ["Frag", "Left"] ? Is this an implementation detail? Thanks a lot! 回答1: The short answer is: yes, as of this writing it will work. The better answer is: it may not work that way in the future, and the nature of the question concerns me. It's safe to use record_info/2 , although relying on the order may be

问题 In all the examples I have seen the results from esqueleto are projected into a list of tuples. This makes coding and maintenance harder because of lack of labels. For example: previousLogItems <- select $ from $ \li -> do orderBy [desc (li ^. LogItemId)] limit 10 return (li ^. LogItemId, li ^. LogItemTitle) Is there any way to get esqueleto to project the results to a list of records instead? 回答1: In fact you construct the tuple yourself. Indeed: previousLogItems <- select $ from $ \li -> do

问题 I want to get the duration of the call but confused which variable to use ${CDR(duration)} or ${CDR(billsec)} Here it is not clear from when ${CDR(duration)} records the time So which should i use ${CDR(duration)} or ${CDR(billsec)} ? 回答1: Call come in, after that not answer X second, after that answered, after that Y sec speak/play something and hangup. So duration will be X+Y, while billsec(time to be billed) will be Y. 回答2: BillSec is "how long was the call off hook" ... a common metric

问题 Update: as noted in the comments, this is a bug. I've reported it to Microsoft and it has been routed to a VS development team for investigation. I'll update this answer if and when there's news. Further update: a fix has been committed to the project on CodePlex, yay! Given a record type: namespace Rather.Deep.Namespace type TestRecord = { /// Property summary Prop : string } VS2013 generates the following IntelliSense XML for this field: <member name="F:Rather.Deep.Namespace.Rather.Deep

问题 In this answer, the suggested way of "attaching" meta information to types was using a record: type _foo = ... and foo = {n:_foo; m:meta} but what if I have multiple types I'd like to wrap with meta information? Apparently all field names in record types must have different names, and writing: type _foo = ... and foo = {n:_foo; m:meta} ... type _fooX = ... and fooX = {nX:_fooX; mX:meta} seems redundant :/. Classes are the only way to solve this? I'd like to avoid dealing with classes, if

问题 I'm trying this: type TS1<'state, 'action> = { actions : 'state -> #seq<'action> move : 'state -> 'action -> 'state state0 : 'state } But the type checker won't let me: .../stdin(2,29):error FS0715: Anonymous type variables are not permitted in this declaration However, if I unfold the definition of the flexible type, I'm good: type TS2<'state, 'action, 'actions when 'actions :> seq<'action>> = { actions : 'state -> 'actions move : 'state -> 'action -> 'state state0 : 'state } I'm unhappy