大约有 2,070 项符合查询结果（耗时：0.0259秒） [XML]
How do we control web page caching, across all browsers?
... this:
Cache-Control: no-store
<body onunload="">
Below shows the raw logs of my tests:
HTTP:
Cache-Control: private, no-cache, no-store, must-revalidate, max-age=0, proxy-revalidate, s-maxage=0
Expires: 0
Pragma: no-cache
Vary: *
<body onunload="">
Fail: Opera 12.15
Success: Chrom...
JavaScript + Unicode regexes
...thanks to @modiX and @Lwangaman for the improvements).
Here's the source (raw, 27.5KB; minified, 24.9KB, not much better...). It might be made smaller by unescaping the unicode characters, but OTOH will run the risk of encoding issues, so I'm leaving as it is. Hopefully with ES6 this kind of thing ...
Further understanding setRetainInstance(true)
...r example, a configuration change. This is a lot
* easier than using the raw Activity.onRetainNonConfiguratinInstance() API.
*/
public class FragmentRetainInstance extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);...
How to choose an AES encryption mode (CBC ECB CTR OCB CFB)?
...
CCM: A nonce-based AEAD scheme that combines CTR mode encryption and the raw
CBC-MAC. Inherently serial, limiting speed in some contexts. Provably secure, with good bounds, assuming the underlying blockcipher is a good PRP. Ungainly construction that demonstrably does the job. Simpler to implement...
What is the difference between quiet NaN and signaling NaN?
...tion to classify if a NaN is sNaN or qNaN, so let's just print out the NaN raw bytes:
main.cpp
#include <cassert>
#include <cstring>
#include <cmath> // nanf, isnan
#include <iostream>
#include <limits> // std::numeric_limits
#pragma STDC FENV_ACCESS ON
void print_f...
data.table vs dplyr: can one do something well the other can't or does poorly?
...e dplyr for expressiveness on medium data;
feel free to use data.table for raw speed on bigger data.
The flexibility of dplyr also means that you can easily tweak performance
characteristics using the same syntax. If the performance of dplyr with
the data frame backend is not good enough for you, y...
How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
...;setPublicKey();
echo $rsa->getPublicKey(CRYPT_RSA_PUBLIC_FORMAT_PKCS1_RAW);
The base64-encoded stuff appears to match even though the header says BEGIN PUBLIC KEY and not BEGIN RSA PUBLIC KEY. So maybe just use str_replace to fix that and you should be good to go!
...
What is move semantics?
...op and discuss a simplified version of unique_ptr. First, we encapsulate a raw pointer and overload the operators -> and *, so our class feels like a pointer:
template<typename T>
class unique_ptr
{
T* ptr;
public:
T* operator->() const
{
return ptr;
}
T&a...
The definitive guide to form-based website authentication [closed]
...ly hacked, leaked or gleaned through SQL injection, and if you are storing raw, plaintext passwords, that is instant game over for your login security.
So if you can't store the password, how do you check that the login+password combination POSTed from the login form is correct? The answer is hashin...
Why does modern Perl avoid UTF-8 by default?
...". Your program appears to work (because the other end usually handles the raw Perl characters correctly), but it is very broken and could stop working at any moment. Fix it with an explicit Encode::encode!
The second problem is UTF-8 encoded source code. Unless you say use utf8 at the top of each ...