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Why isn't sizeof for a struct equal to the sum of sizeof of each member?
...
If you want the structure to have a certain size with GCC for example use __attribute__((packed)).
On Windows you can set the alignment to one byte when using the cl.exe compier with the /Zp option.
Usually it is easier for the CPU to access data that is a multiple of 4 (or 8), depending platform...
NodeJS - What does “socket hang up” actually mean?
... socket hang up] code: 'ECONNRESET' }
at ClientRequest.proxyError (your_server_code_error_handler.js:137:15)
at ClientRequest.emit (events.js:117:20)
at Socket.socketCloseListener (http.js:1526:9)
at Socket.emit (events.js:95:17)
at TCP.close (net.js:465:12)
Line http.js:1526:9...
Can C++ code be valid in both C++03 and C++11 but do different things?
...c"
const char* s = u8"def"; // Previously "abcdef", now "def"
and
#define _x "there"
"hello "_x // Previously "hello there", now a user defined string literal
Type conversions of 0
In C++11, only literals are integer null pointer constants:
void f(void *); // #1
void f(...); // #2
template<int ...
Prevent “overscrolling” of web page
...on id="inbox"><!-- msgs --></section>
<script>
let _startY;
const inbox = document.querySelector('#inbox');
inbox.addEventListener('touchstart', e => {
_startY = e.touches[0].pageY;
}, {passive: true});
inbox.addEventListener('touchmove', e => {
const ...
Instance v state variables in react.js
...nter: function () {
// Open a new one after a delay
this._timeout = setTimeout(function () {
this.openWidget();
}.bind(this), DELAY);
},
handleLeave: function () {
// Clear the timeout for opening the widget
clearTimeout(this._timeout...
What's the yield keyword in JavaScript?
...ed process3');
console.log('End of the process function');
}
let _process = process();
Until you call the _process.next() it wont execute the first 2 lines of code, then the first yield will pause the function.
To resume the function until next pause point (yield keyword) you need to cal...
Installing SciPy with pip
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An attempt to easy_install indicates a problem with their listing in the Python Package Index, which pip searches.
easy_install scipy
Searching for scipy
Reading http://pypi.python.org/simple/scipy/
Reading http://www.scipy.org
Reading http:/...
What are POD types in C++?
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In C++11, you can do std::is_pod<MyType>() to tell whether MyType is POD.
– allyourcode
Mar 31 '14 at 21:24
7
...
Reading a key from the Web.Config using ConfigurationManager
... edited Jul 11 '14 at 16:55
dav_i
24.3k1717 gold badges9292 silver badges127127 bronze badges
answered Jan 4 '11 at 15:29
...
@UniqueConstraint annotation in Java
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@Entity
@Table(uniqueConstraints={@UniqueConstraint(columnNames = {"id_1" , "id_2"})})
public class class_name {
@Id
@GeneratedValue
public Long id;
@NotNull
public Long id_1;
@NotNull
public Long id_2;
}
Hope it helped.
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