indexing

问题 I have in my source code: // foo.cpp struct foo { foo() {} #ifdef I_WANT_THIS_FEATURE void bar() {} #endif }; In my Makefile I have foo.o: foo.cpp g++ -c -DI_WANT_THIS_FEATURE foo.cpp -o foo.o This compiles fine from the command line as well as with the external builder that I have created in Eclipse (which basically defines a few environment variables and calls make ) and I can call foo::bar() . However, in the Eclipse CDT source code editor, the part where I define foo::bar() has a grey

问题 I have in my source code: // foo.cpp struct foo { foo() {} #ifdef I_WANT_THIS_FEATURE void bar() {} #endif }; In my Makefile I have foo.o: foo.cpp g++ -c -DI_WANT_THIS_FEATURE foo.cpp -o foo.o This compiles fine from the command line as well as with the external builder that I have created in Eclipse (which basically defines a few environment variables and calls make ) and I can call foo::bar() . However, in the Eclipse CDT source code editor, the part where I define foo::bar() has a grey

问题 I have a pandas dataframe with multiindex as the following: TALLY DAY NODE CLASS 2018-02-04 pdk2r08o005 3 7.0 2018-02-05 pdk2r08o005 3 24.0 2018-02-06 dsvtxvCsdbc02 3 2.0 pdk2r08o005 3 28.0 2018-02-07 pdk2r08o005 3 24.0 2018-02-08 dsvtxvCsdbc02 3 3.0 pdk2r08o005 3 24.0 2018-02-09 pdk2r08o005 3 24.0 2018-02-10 dsvtxvCsdbc02 3 2.0 pdk2r08o005 3 24.0 2018-02-11 pdk2r08o005 3 31.0 2018-02-12 pdk2r08o005 3 24.0 2018-02-13 pdk2r08o005 3 20.0 2018-02-14 dsvtxvCsdbc02 3 4.0 pdk2r08o005 3 24.0 2018-02

问题 i am able to update the value to the sections "User foo" and "Host *.example.net" by passing the index. If i pass index 1 or 2 the respective value is getting updated. my code: $sections = ['Host *.example.net', 'User foo'] $sections.each |String $section| { sshd_config_match { "${section}": ensure => present, } } $settings = [['User foo', 'X11Forwarding yes', 'banner none'],['Host *.example.net', 'X11Forwarding no', 'banner none']] $settings.each |Array $setting| { $setting_array = split(

问题 Hi I have a list of unordered elements. When clicked I would like to insert a <p> element whilst splitting the <ul> in 2. The problem being that $("</ul>"+text+"<ul class=\"test\">").insertAfter(element); seems to separate the <p> element from the <ul> elements, inserting the <p> first then the <ul> tags. I would also like to remove the opening and closing <ul> immediately before and after the .temp element so I can split the <ul> in different spot. This was the only method I could find but

问题 Typically the accepted approach is to do the following Number to Letter public function numberToLetter(ByVal i as long) as string Dim s as string: s = cells(1,i).address(false,false) numberToLetter = left(s,len(s)-1) end function Letter to Number Public Function letterToNumber(ByVal s As String) As Long letterToNumber = Range(s & 1).Column End Function However neither of these are particular optimal, as in each case we are creating an object, and then calling a property accessor on the object

问题 I have a table mainly used by this query (only 3 columns are in use here, meter , timeStampUtc and createdOnUtc , but there are other in the table), which starts to take too long: select rank() over (order by mr.meter, mr."timeStampUtc") as row_name , max(mr."createdOnUtc") over (partition by mr.meter, mr."timeStampUtc") as "createdOnUtc" from "MeterReading" mr where "createdOnUtc" >= '2021-01-01' order by row_name ; (this is the minimal query to show my issue. It might not make too much

问题 i'm trying to use an index buffer but have no idea how i really am stuck in a waall as to what i'm supposed to even try so. none of the tutorials really show anything similar to my code which is mostly why i'm having problems. i might have to rewrite cube vertex array creator. (on a different note maybe i shouldn't have just shoved opengl into some ready code)right now i've only enabled the top face as to see what's going on. /// <summary> /// Draws the specified Cube Onsccreen. /// </summary

问题 i'm trying to use an index buffer but have no idea how i really am stuck in a waall as to what i'm supposed to even try so. none of the tutorials really show anything similar to my code which is mostly why i'm having problems. i might have to rewrite cube vertex array creator. (on a different note maybe i shouldn't have just shoved opengl into some ready code)right now i've only enabled the top face as to see what's going on. /// <summary> /// Draws the specified Cube Onsccreen. /// </summary

问题 With a table like: idx type dat 0 a foo1 1 b foo2 2 c foo3 3 a foo4 4 b foo5 5 c foo6 6 a foo7 7 b foo8 8 c foo9 How can i get the first and last data of each type: for example: a foo1 foo7 b foo2 foo8 c foo3 foo9 I have tried this query, but its way to slow, even with indexes on idx and type: select mins.type, mins.dat, mytable.dat from mytable --get the maximums inner join (select max(idx) as maxidx from mytable group by type) as a on a.maxidx = mytable.idx --join the maximums to the