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How can I convert a std::string to int?
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In C++11 there are some nice new convert functions from std::string to a number type.
So instead of
atoi( str.c_str() )
you can use
std::stoi( str )
where str is your number as std::string.
There are version for all flavours of numbers:
long stol(string), float stof(...
Finding # occurrences of a character in a string in Ruby
... I really liked this answer until I noticed that you just took the string from the question :-) Still +1 though.
– Hubro
Sep 18 '13 at 11:05
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Is it possible to have empty RequestParam values use the defaultValue?
...ll) {
i = 10;
}
// ...
}
I have removed the defaultValue from the example above, but you may want to include it if you expect to receive requests where it isn't set at all:
http://example.com/test
share
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How can I check in a Bash script if my local Git repository has changes?
...t you meant was:
if [ -n "$CHANGED" ]; then
VN="$VN-mod"
fi
A quote from Git's GIT-VERSION-GEN:
git update-index -q --refresh
test -z "$(git diff-index --name-only HEAD --)" ||
VN="$VN-dirty"
It looks like you were copying that, but you just forgot that detail of quoting.
Of course, you c...
Checking for NULL pointer in C/C++ [closed]
...e language is much simpler and reliance on the pre-processor more common.
From this perspective I'd probably recommend using the NULL macro definition in C.
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improve this answer
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Cannot deserialize the JSON array (e.g. [1,2,3]) into type ' ' because type requires JSON object (e.
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FYI this didn't work for me because I was getting my JSON from an API and I had the freaking URL wrong for an entire day. ><
– w00ngy
Oct 5 '18 at 13:14
1
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What is the function of the push / pop instructions used on registers in x86 assembly?
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Also, local variables spilled from regs will typically still be hot in L1 cache if any of them are actually being used. But reading from a register is effectively free, zero latency. So it's infinitely faster than L1 cache, depending on how you want to ...
How do I import .sql files into SQLite 3?
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From a sqlite prompt:
sqlite> .read db.sql
Or:
cat db.sql | sqlite3 database.db
Also, your SQL is invalid - you need ; on the end of your statements:
create table server(name varchar(50),ipaddress varchar(15),id ini...
Do I need all three constructors for an Android custom view?
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If you will add your custom View from xml also like :
<com.mypack.MyView
...
/>
you will need the constructor public MyView(Context context, AttributeSet attrs), otherwise you will get an Exception when Android tries to inflate your Vie...
Using Transactions or SaveChanges(false) and AcceptAllChanges()?
...soft.com/en-us/data/dn456843.aspx
use context.Database.BeginTransaction.
From MSDN:
using (var context = new BloggingContext())
{
using (var dbContextTransaction = context.Database.BeginTransaction())
{
try
{
context.Database.ExecuteSqlCommand(
...