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What does the 'L' in front a string mean in C++?
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'L' means wchar_t, which, as opposed to a normal character, requires 16-bits of storage rather than 8-bits. Here's an example:
"A" = 41
"ABC" = 41 42 43
L"A" = 00 41
L"ABC" = 00 41 00 42 00 43
A wchar_t is twice big as a...
JSON Naming Convention (snake_case, camelCase or PascalCase) [closed]
...row button by Property Name Guidelines->Property Name Format->Choose meaningful property names..
– Panzercrisis
Dec 23 '14 at 14:26
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How to get form field's id in Django?
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I think what you mean is that you can use "auto_id" for the id, but you have to use "html_name" for the name. Sadly I find your answer is worded confusingly given the question.
– Steve
Nov 1 '12 at 21:04...
How to remove old Docker containers
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What do you mean "storage containers"? If you mean data-only containers which once upon a time were used to keep references to data volumes, those are no longer necessary because of the availability of docker volume subcommand, and named...
What's the difference between lapply and do.call?
...example with a list :
X <- list(1:3,4:6,7:9)
With lapply you get the mean of every element in the list like this :
> lapply(X,mean)
[[1]]
[1] 2
[[2]]
[1] 5
[[3]]
[1] 8
do.call gives an error, as mean expects the argument "trim" to be 1.
On the other hand, rbind binds all arguments ro...
How do I map lists of nested objects with Dapper
...ation to course? It'sessentially the same thing minus the inner join which means sql wont transfer as many bytes?
– MIKE
May 31 '18 at 17:10
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What is the Git equivalent for revision number?
... with "fatal: No names found, cannot describe anything." - Stack Overflow; meaning that you'd have to set up tags yourself.
– sdaau
Apr 21 '13 at 19:41
14
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Can I use non existing CSS classes?
...ts, and your markup is perfectly valid as it is.
This doesn't necessarily mean that you need to have a class declared in the HTML before you can use it in CSS either. See ruakh's comment. Whether or not a selector is valid depends entirely on the selector syntax, and CSS has its own set of rules fo...
Assign multiple columns using := in data.table, by group
...hello
# 4: 1 4 hi hello
# 5: 2 5 hi hello
# 6: 3 6 hi hello
x[ , c("mean", "sum") := list(mean(b), sum(b)), by = a][]
# a b col1 col2 mean sum
# 1: 1 1 hi hello 2.5 5
# 2: 2 2 hi hello 3.5 7
# 3: 3 3 hi hello 4.5 9
# 4: 1 4 hi hello 2.5 5
# 5: 2 5 hi hello 3.5 7
#...
What do REFRESH and MERGE mean in terms of databases?
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REFRESH means "pull any state changes from the database into my representation". Cascading this is simple; it means that all associated entities are refreshed.
MERGE means something complex that approximates "save" but is more like...