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VC DDE（Dynamic Data Exchange）与EXCEL连接 - C/C++ - 清泛网 - 专注C/C++及内核技术
...Inst, HCONV hConv, char* szItem, char* sDesc)
{
HSZ hszItem = DdeCreateStringHandle(idInst, szItem, 0);
HDDEDATA hData = DdeClientTransaction(NULL,0,hConv,hszItem,CF_TEXT,
XTYP_REQUEST,5000 , NULL);
if (hData==NULL)
{
printf("Request fa...
Capturing multiple line output into a Bash variable
...out, stderr are 0-2, so we can use &3 or higher in bash).
result=""
./test>/tmp/foo
while read line <&3; do
result="$result$line\n"
done 3</tmp/foo
echo -e $result
you can also use mktemp, but this is just a quick code example. Usage for mktemp looks like:
filenamevar=`mkte...
Javascript swap array elements
...uch more neatly:"
[ list[x], list[y] ] = [ list[y], list[x] ];
My quick tests showed that this Pythonic code works great in the version of JavaScript
currently used in "Google Apps Script" (".gs").
Alas, further tests show this code gives a "Uncaught ReferenceError: Invalid left-hand side in assi...
Update Item to Revision vs Revert to Revision
...essing subversion is going to see the conflict and force me to merge the latest version in the repository into my modified working copy before I submit it.
– Eric Anastas
Aug 1 '09 at 19:48
...
Java Delegates?
... but they're fakeable using proxies and reflection:
public static class TestClass {
public String knockKnock() {
return "who's there?";
}
}
private final TestClass testInstance = new TestClass();
@Test public void
can_delegate_a_single_method_interface_to_an_instan...
Header files for x86 SIMD intrinsics
...
20200914: latest best practice: <immintrin.h> (also supported by MSVC)
I'll leave the rest of the answer for historic purposes; it might be useful for older compiler / platform combinations...
As many of the answers and comments h...
Best way to “negate” an instanceof
...c static final Predicate<Object> isInstanceOfTheClass =
objectToTest -> objectToTest instanceof TheClass;
public static final Predicate<Object> isNotInstanceOfTheClass =
isInstanceOfTheClass.negate(); // or objectToTest -> !(objectToTest instanceof TheClass)
if (isNotIn...
Favourite performance tuning tricks [closed]
...d ordered, and a HASH for everything else. Adding a join hint will let you test your theory.
Parameter sniffing. If you ran the stored proc with unrealistic values at first (say, for testing), then the cached query plan may be suboptimal for your production values. Running again WITH RECOMPILE shoul...
The application was unable to start correctly (0xc000007b)
...
To start, I would suggest to test whether there is a problem between your application and its dependencies using dependency walker
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How do I modify fields inside the new PostgreSQL JSON datatype?
...am seeing an error when I try select json_object_set_key((select data from test where data->>'b' = '2'), 'b', 'two'); error message is ERROR: could not determine polymorphic type because input has type "unknown"
– user9645
May 7 '14 at 13:14
...