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C++ templates Turing-complete?
...te<typename List, int N, typename = void>
struct GetItem {
static_assert(N > 0, "index cannot be negative");
static_assert(GetSize<List>::value > 0, "index too high");
typedef typename GetItem<typename List::tail, N-1>::type type;
};
template<typename List>...
What actually causes a Stack Overflow error? [duplicate]
...t pc=0x00007f4822f9d501, pid=4988, tid=139947823249152
#
# JRE version: 6.0_27-b27
# Java VM: OpenJDK 64-Bit Server VM (20.0-b12 mixed mode linux-amd64 compressed oops)
# Derivative: IcedTea6 1.12.6
# Distribution: Ubuntu 10.04.1 LTS, package 6b27-1.12.6-1ubuntu0.10.04.2
# Problematic frame:
# V [l...
Reshaping data.frame from wide to long format
...UE)
library(reshape)
x2 <- melt(x, id = c("Code", "Country"), variable_name = "Year")
x2[,"Year"] <- as.numeric(gsub("X", "" , x2[,"Year"]))
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python requests file upload
...
If upload_file is meant to be the file, use:
files = {'upload_file': open('file.txt','rb')}
values = {'DB': 'photcat', 'OUT': 'csv', 'SHORT': 'short'}
r = requests.post(url, files=files, data=values)
and requests will send a multi...
Is it safe to remove selected keys from map within a range loop?
...r(1024)
m[k] = GenerateRandStr(1024*1024)
for k2, _ := range m {
delete(m, k2)
break
}
}
}()
osSignals := make(chan os.Signal, 1)
signal.Notify(osSignals, os.Interrupt)
for {
select {
case &...
Is Safari on iOS 6 caching $.ajax results?
..."no-cache" just to POSTs if you wish like this in Apache:
SetEnvIf Request_Method "POST" IS_POST
Header set Cache-Control "no-cache" env=IS_POST
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How to generate gcc debug symbol outside the build target?
...e:
program: program.o version.o
program.o: program.cpp program.h
build_version.o: build_version.c
build_version.c:
@echo "const char *build1=\"VCS: Commit: $(shell git log -1 --pretty=%H)\";" > "$@"
@echo "const char *build2=\"VCS: Date: $(shell git log -1 --pretty=%cd)\";" >...
How do I join two SQLite tables in my Android application?
I have an Android project that has a database with two tables: tbl_question and tbl_alternative .
4 Answers
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Java switch statement: Constant expression required, but it IS constant
...ssion to be known at compile time to compile a switch, but why isn't Foo.BA_ constant?
While they are constant from the perspective of any code that executes after the fields have been initialized, they are not a compile time constant in the sense required by the JLS; see §15.28 Constant Expressi...
What is “thread local storage” in Python, and why do I need it?
...ced in there. If you're curious about its implementation, the source is in _threading_local.py in the standard library.
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