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数据存储组件 · App Inventor 2 中文网
... 顶部 var qrcode = new QRCode("qrcode", { text: window.location.href + "?f=share", //URL地址 width: 150, height: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网 MIT同步更新的中文本...
How do you use bcrypt for hashing passwords in PHP?
... (strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN')) { // OpenSSL is slow on Windows
$bytes = openssl_random_pseudo_bytes($count);
}
if ($bytes === '' && is_readable('/dev/urandom') &&
($hRand = @fopen('/dev/urandom', 'rb')) !== FALSE) {
$bytes = fread($hRan...
Best practices for circular shift (rotate) operations in C++
...
@fake-name '> so the C++11 version won't work on windows unless you change that to something else...' Yeah, change that to linux. :)
– Slava
Jan 18 '18 at 14:40
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Why does SIGPIPE exist?
...SIGPIPE. Run a pipeline like
cat | B | more
and in another terminal window, attach a debugger to B and put a breakpoint inside the B signal handler.
Now, kill the more and B should break in your signal handler. examine the stack. You'll find that the read is still pending. let the signal ...
How does SSL really work?
...fication for the server certificate which it receives in Server Hello.
On Windows, you can see the certificate stores for client & Server via PowerShell. Execute the below from a PowerShell console.
PS Cert:> ls Location : CurrentUser StoreNames : {TrustedPublisher, ClientAuthIssuer, ...
Efficiency of Java “Double Brace Initialization”?
...urrentTimeMillis, so the timer does not have a very high resolution. On my Windows system, the resolution is around 15-16 milliseconds.
The results for 10 runs of the two tests were the following:
Test1 Times (ms) Test2 Times (ms)
---------------- ----------------
18...
How do I find where an exception was thrown in C++?
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he said gdb, which pretty much rules out Windows/Visual Studio.
– Ben Voigt
Mar 15 '10 at 14:28
2
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How to create GUID / UUID?
...h they are signed). Finally it would be a very good idea these days to use window.crypto.getRandomValues if available, and fall-back to Math.random only if absolutely necessary. Math.random may well have less than 128 bits of entropy, in which case this would be more vulnerable to collisions than ne...
Java 8: Lambda-Streams, Filter by Method with Exception
...ttyIO do the "sneaky throw" before, and I wanted to throw my chair out the window. "What? Where did that checked exception leak from?" This is the first legit use case for sneaky throw I have seen yet. As a programmer you have to be vigilant about indicating sneaky throw is possible. Maybe bett...
中文网（自研/维护）拓展 · App Inventor 2 中文网
... 顶部 var qrcode = new QRCode("qrcode", { text: window.location.href + "?f=share", //URL地址 width: 150, height: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网 MIT同步更新的中文本...