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Difference between EXISTS and IN in SQL?
...exists (select 1 from emp where salary > 1000) then 1 else 0 end as sal_over_1000
– smooth_smoothie
Aug 25 '16 at 4:17
...
How to get the difference between two arrays in JavaScript?
...not, you need to change the for loop to a for .. in loop.
function arr_diff (a1, a2) {
var a = [], diff = [];
for (var i = 0; i < a1.length; i++) {
a[a1[i]] = true;
}
for (var i = 0; i < a2.length; i++) {
if (a[a2[i]]) {
delete a[a2...
Cannot insert explicit value for identity column in table 'table' when IDENTITY_INSERT is set to OFF
...e like this so that you can specify your own identity values.
SET IDENTITY_INSERT Table1 ON
INSERT INTO Table1
/*Note the column list is REQUIRED here, not optional*/
(OperationID,
OpDescription,
FilterID)
VALUES (20,
'Hierachy Update',
...
When to use volatile with multi threading?
...n mechanism. To get synchronization, use atomic, a
mutex, or a condition_variable.
[/End update]
The above all applies the the C++ language itself, as defined by the 2003 Standard (and now the 2011 Standard). Some specific platforms however do add additional functionality or restrictions to w...
Generating a unique machine id
...search I decided the best would be to read MachineGuid in registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography, as @Agnus suggested. It is generated during OS installation and won't change unless you make another fresh OS install. Depending on the OS version it may contain the network ada...
Html table tr inside td
...ited May 12 '14 at 17:37
katalin_2003
62911 gold badge1212 silver badges2626 bronze badges
answered Jun 13 '13 at 14:00
...
How do I use boolean variables in Perl?
...n true and false, so not only does it have booleans, it has true (!0 aka PL_sv_yes) and false (!1 aka PL_sv_no). Or are you saying Perl should croak whenever something other than these two values are tested for truthness? That would be completely awful. e.g. It would prevent $x ||= $default;
...
“Conversion to Dalvik format failed with error 1” on external JAR
...buildpath that include the same package and classes.
smack.jar and android_maps_lib-1.0.2
Deleting this package from one of the JAR files solved the problem.
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Secret copy to clipboard JavaScript function in Chrome and Firefox?
...learConsoleMessages();
}
> copy
function (object)
{
if (injectedScript._type(object) === "node")
object = object.outerHTML;
InjectedScriptHost.copyText(object);
}
While the Firebug source also defines a list of functions:
this.clear = function() // no web page interaction
{
Firebug.Cons...
Is there any git hook for pull?
...
post-merge - see https://git-scm.com/docs/githooks#_post_merge for more details of how to use it.
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