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g++ undefined reference to typeinfo
...try to find it in one of the other compilation units (or libraries).
An example of defining the virtual function is:
virtual void fn() { /* insert code here */ }
In this case, you are attaching a definition to the declaration, which means the linker doesn't need to resolve it later.
The line
v...
Why can't (or doesn't) the compiler optimize a predictable addition loop into a multiplication?
... account, though (@Mysticial, could you try with a condition like data[c] & 0x80 or so that can be true for positive and negative values?). I had compilers make invalid optimisations (for example, a couple of years ago, I had an ICC (11.0, iirc) use signed-32-bit-int-to-double conversion in 1.0/...
How to manually set an authenticated user in Spring Security / SpringMVC
...forward:/login?j_username=" + registrationModel.getUserEmail()
+ "&j_password=" + registrationModel.getPassword();
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WebKit issues with event.layerX and event.layerY
...[];
while (len--) {
var el = all[len];
if (el != 'layerX' && el != 'layerY') res.push(el);
}
$.event.props = res;
}());
UPDATE
See the latest performance tests to find out what the fastest way is to remove the event props.
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How to pad zeroes to a string?
...ited in the parens; since only one thing is being printed, it works identically now on Py2 and Py3.
– ShadowRanger
Jan 25 '19 at 2:19
2
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Open URL in new window with JavaScript
...indow.open() function? The third parameter lets you specify window size.
Example
var strWindowFeatures = "location=yes,height=570,width=520,scrollbars=yes,status=yes";
var URL = "https://www.linkedin.com/cws/share?mini=true&url=" + location.href;
var win = window.open(URL, "_blank", strWindo...
c++读注册表 - c++1y / stl - 清泛IT社区，为创新赋能！
...hs\\xxx"));
HKEY hKey;
LONG rc = RegOpenKey(HKEY_LOCAL_MACHINE, key, &hKey);
if (ERROR_SUCCESS == rc)
{
        WCHAR szBuffer[MAX_PATH];
        DWORD dwBufferSize = sizeof(szBuffer);
        rc = Reg...
How to use “raise” keyword in Python [duplicate]
I have read the official definition of "raise", but I still don't quite understand what it does.
6 Answers
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Variable name as a string in Javascript
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Typically, you would use a hash table for a situation where you want to map a name to some value, and be able to retrieve both.
var obj = { myFirstName: 'John' };
obj.foo = 'Another name';
for(key in obj)
console.log(k...
Generating a unique machine id
...f you clone an drive image this will stay the same. So this is not at all tampersafe and very unsecure.
– bitbonk
Jul 8 '11 at 11:34
19
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