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When to make a type non-movable in C++11?
...han Wakely
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17
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What's the difference between a temp table and table variable in SQL Server?
...riables
– Martin Smith
Jul 2 '13 at 6:32
4
Table variables not being affected by transactions is ...
Combine two data frames by rows (rbind) when they have different sets of columns
...ttacharyaJyotirmoy Bhattacharya
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How to get the position of a character in Python?
...|
edited Dec 21 '17 at 0:16
L S
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answered Feb 19 ...
How do Mockito matchers work?
...a method:
when(foo.quux(anyInt(), and(gt(10), lt(20)))).thenReturn(true);
[6] [5] [1] [4] [2] [3]
This will:
Add anyInt() to the stack.
Add gt(10) to the stack.
Add lt(20) to the stack.
Remove gt(10) and lt(20) and add and(gt(10), lt(20)).
Call foo.quux(0, 0), which (unless otherwi...
Clang optimization levels
...
Documentation of individual passes is available here.
With version 6.0 the passes are as follow:
baseline (-O0):
opt sets: -tti -verify -ee-instrument -targetlibinfo -assumption-cache-tracker -profile-summary-info -forceattrs -basiccg -always-inline -barrier
clang adds : -mdisable-fp-eli...
ActiveRecord.find(array_of_ids), preserving order
...d FIELD()
Here is how you could use it in .find():
>> ids = [100, 1, 6]
=> [100, 1, 6]
>> WordDocument.find(ids).collect(&:id)
=> [1, 6, 100]
>> WordDocument.find(ids, :order => "field(id, #{ids.join(',')})")
=> [100, 1, 6]
For new Version
>> WordDocument.w...
Call apply-like function on each row of dataframe with multiple arguments from each row
...set of the original data.
dat <- data.frame(x=c(1,2), y=c(3,4), z=c(5,6))
apply(dat[,c('x','z')], 1, function(x) sum(x) )
or if your function is just sum use the vectorized version:
rowSums(dat[,c('x','z')])
[1] 6 8
If you want to use testFunc
testFunc <- function(a, b) a + b
apply(...
“android.view.WindowManager$BadTokenException: Unable to add window” on buider.show()
...
268
android.view.WindowManager$BadTokenException: Unable to add window"
Problem :
This except...
Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
...pies at all.
Or, we can modify the original DT by reference :
DT[2, b := 600]
# a b
# [1,] 1 11
# [2,] 2 600
.Internal(inspect(DT))
# @0000000003B7E2A0 19 VECSXP g0c7 [OBJ,NAM(2),ATT] (len=2, tl=100)
# @00000000040C2288 14 REALSXP g0c2 [NAM(2)] (len=2, tl=0) 1,2
# @00000000040C2250 14...