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#pragma pack effect
...what the 8 byte boundary already gave you. You'll get the same performance from the CPU, while getting much worse cache utilization for the reasons outlined in that post.
– jalf
May 14 '15 at 18:30
...
How to check that an object is empty in PHP?
...(json_encode($obj), TRUE)` can be slow because
// you're converting to and from a JSON string.
// I don't know another simple way to do a deep conversion from object to array
$array = json_decode(json_encode($obj), TRUE);
if ( !array_filter($array) )
{
// empty or all properties falsey
}
Old...
How many GCC optimization levels are there?
...ted there were 7 options. GCC has since added -Og to bring the total to 8
From the man page:
-O (Same as -O1)
-O0 (do no optimization, the default if no optimization level is specified)
-O1 (optimize minimally)
-O2 (optimize more)
-O3 (optimize even more)
-Ofast (optimize very ag...
Why can't variable names start with numbers?
...nguage need to be able to readily (at a glance) distinguish variable names from numbers. If the first character didn't tell you -- instead, if you needed to search through the rest of the word to tell if there was a non-numeric alpha somewhere in there -- the code would be harder to read.
...
Frontend tool to manage H2 database [closed]
...
one discuss found here
quote from Thomas Mueller:
http://www.dbsolo.com/
http://www.minq.se/products/dbvis/
http://executequery.org/index.jsp
http://sqldeveloper.solyp.com/index.html
http://sql-workbench.net/index.html
http://www....
Error pushing to GitHub - insufficient permission for adding an object to repository database
...
When you see this error outside of github, here's a remedy.
Got this from:
http://mapopa.blogspot.com/2009/10/git-insufficient-permission-for-adding.html
ssh me@myserver
cd repository/.git
sudo chmod -R g+ws *
sudo chgrp -R mygroup *
git config core.sharedRepository true
After this the gi...
What does default(object); do in C#?
...d to zero or null depending on whether they are value or reference types.
from MSDN
Simple Sample code :<br>
class Foo
{
public string Bar { get; set; }
}
struct Bar
{
public int FooBar { get; set; }
public Foo BarFoo { get; set; }
}
publ...
What is the difference between HTTP and REST?
...ost, with RPC you might create services called AddLikeToPost and RemoveLikeFromPost, and manage it along with all your other services related to FB posts, thus you won't need to create special object for Like.
with REST you will have a Like object which will be managed separately with Delete and Cr...
Intellij IDEA generate for-each/for keyboard shortcut
...
Create for loop from an existing list statement:
Highlight the list
Cmd+Alt+J or Ctrl+Alt+J
Choose Iterate Iterable from the dropdown (i)
https://www.jetbrains.com/phpstorm/help/creating-code-constructs-using-surround-templates.html
...
var functionName = function() {} vs function functionName() {}
...s is a function expression:
var xyz = function(){};
xyz here is defined from the point of assignment:
// We can't call it here
xyz(); // UNDEFINED!!!
// Now it is defined
xyz = function(){}
// We can call it here
xyz(); // works
Function declaration vs. function expression is the real reason...