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Does RavenDb's `Include` support constructing a document id, not just selecting one?


Does RavenDb's `Include` support constructing a document id, not just selecting one?

By : user2172882
Date : October 22 2020, 08:10 AM
I wish did fix the issue. It sounds like you want to use Lazy, rather than Include.
Include
code :
// Good:
// Note that StateId, ExtId, and MaterialId are all properties on our Coil class.
session.Query<Coil>()
   .Include(c => c.StateId)
   .Include(c => c.ExtId)
   .Inclide(c => c.MaterialId);

// Bad:
session.Query<Coil>
   .Include(c => "CoilStates/123")
   .Include(c => "CoilExts/456")
   .Include(c => "Materials/789")
// Lazily load the coil. No DB trip yet.
var lazyCoil = session.Query<Coil>()
   .Where(...)
   .Lazily();

// Lazily load a CoilState. No DB trip yet.
var lazyCoilState = session.Advanced.Lazily.Load<CoilState>("CoilStates/123");

// Lazily load a Material. Still no DB trip.
var lazyMaterial = session.Advanced.Lazily.Load<Material>("Materials/456");

// Grab one of the values. This will fetch all lazy loaded items in 1 trip.
var coil = lazyCoil.Value;

// Grab the other values. No DB trip needed; they're already loaded!
var coilState = lazyCoilState.Value;
var material = lazyMaterial.Value;


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Constructing a query, for selecting a table with limit of associations

Constructing a query, for selecting a table with limit of associations


By : user2060513
Date : March 29 2020, 07:55 AM
I wish this helpful for you I have using the last too many hours trying to construct this sql query that i just can't wrap my head around. , Some generic SQL could look like this:
code :
select Jobs.id
from Jobs
left outer join Offer on Offer.job_id = Jobs.id
left outer join Reservation on Reservation.job_id = Jobs.id
group by Jobs.id
having count(distinct Offer.company_id) + count(distinct Reservation.company_id) < 3
Constructing, not selecting, XSL node set variable

Constructing, not selecting, XSL node set variable


By : shua
Date : March 29 2020, 07:55 AM
hop of those help? There isn't a "way around it" in XSLT 1.0 - it's exactly how this is supposed to work. When you have a variable that is declared with content rather than with a select then that content is a result tree fragment consisting of newly-created nodes (even if those nodes are a copy of nodes from the original tree). If you want to refer to the original nodes attached to the original tree then you must declare the variable using select. A better question would be to detail the actual problem and ask how you could write a suitable select expression to find the nodes you want without needing to use for-each - most uses of xsl:if or xsl:choose can be replaced with suitably constructed predicates, maybe involving judicious use of xsl:key, etc.
code :
<xsl:variable name="example" as="node()*">
  <xsl:copy-of select="//entry" />
</xsl:variable>
<xsl:variable name="example" as="node()*">
  <xsl:sequence select="//entry" />
</xsl:variable>
Constructing an R data.table by selecting each row from an array of tables

Constructing an R data.table by selecting each row from an array of tables


By : imJohn
Date : March 29 2020, 07:55 AM
Hope that helps for loops work just fine with data.table but we can improve the performance of your specific loop significantly (I believe) using the following approaches.
Approach # 1
code :
for (i in unique(tableIndexVector)) {
  indx <- which(tableIndexVector == i)
  set(finalTable, i = indx, j = 1:2, value = tableArray[[i]][indx])
}
temp <- rbindlist(tableArray, idcol = "indx")
indx <- temp[, .I[which(tableIndexVector == indx)], by = indx]$V1
finalTable <- temp[indx]
N = 100000  
D = 10    
tableArray = vector("list", D)
set.seed(123)
for (d in 1:D) {
  tableArray[[d]] = data.table(X=rnorm(N), Y=d)  
}

set.seed(123)
tableIndexVector = sample.int(D, N, replace=TRUE) 
finalTable = copy(tableArray[[1]]) 
finalTable2 = copy(tableArray[[1]])

## Your approach
system.time(for (n in 1:N) {
  finalTable[n] = tableArray[[tableIndexVector[n]]][n]
})
#   user  system elapsed 
# 154.79   33.14  191.57     

## My approach # 1
system.time(for (i in unique(tableIndexVector)) {
  indx <- which(tableIndexVector == i)
  set(finalTable2, i = indx, j = 1:2, value = tableArray[[i]][indx])
})    
# user  system elapsed 
# 0.01    0.00    0.02

## My approach # 2
system.time({
  temp <- rbindlist(tableArray, idcol = "indx")
  indx <- temp[, .I[which(tableIndexVector == indx)], by = indx]$V1
  finalTable3 <- temp[indx]
})    
# user  system elapsed 
# 0.11    0.00    0.11 

identical(finalTable, finalTable2)
## [1] TRUE
identical(setorder(finalTable, X), setorder(finalTable3[, indx := NULL], X))
## [1] TRUE
Constructing a string that does not include integer if it is 0 in Java?

Constructing a string that does not include integer if it is 0 in Java?


By : Ampersand
Date : March 29 2020, 07:55 AM
I wish did fix the issue. It looks like you are trying to remove leading zeroes and : after them.
If that is the case you can apply replaceAll(regex,replacement) to x:x:x: part to remove 1 or 2 of 0: placed at start (we don't want to remove last 0:).
code :
"Simplified time: " + (hours + ":" + minutes + ":" + seconds + ":").replaceAll("^(0:){1,2}", "");
Need support constructing an SQL query

Need support constructing an SQL query


By : Taia Modlin
Date : March 29 2020, 07:55 AM
it fixes the issue If a user orders an article which has a Qty (length) > 6, we check if there are articles < 6 in the stpPicklistItems (could be from other customers as well). , This is the working solution, which did the classification.
code :
SELECT DISTINCT 
a.EanUpc, a.ItemName, a.Qty,
CASE 
WHEN (SELECT count(*) 
        FROM stpPicklistItems a2 
        WHERE a2.EanUpc = a.EanUpc 
        AND a2.Qty > 6) >= 1 
THEN 'B'
ELSE 'A' 
END AS Machine
FROM stpPicklistItems a
ORDER BY a.EanUpc DESC
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