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What is the difference between a weak reference and an unowned reference?
...e: String) { self.name = name }
}
class CreditCard {
let number: UInt64
unowned let customer: Customer
init(number: UInt64, customer: Customer) { self.number = number; self.customer = customer }
}
In this example, a Customer may or may not have a CreditCard, but a CreditCard will alwa...
Phase • Animations made easy! - Extensions - Kodular Community
...er-image");
if (splashImage) {
splashImage.src = "data:image/svg+xml;base64,".concat(encodedSvg);
const connectStart = performance.timing.connectStart || 0;
const targetTime = connectStart + DELAY_TARGET;
let splashInterval;
let discourseReady;
const swapSplash = () => {
splashWrappe...
Why use the SQL Server 2008 geography data type?
...h coordinate is stored as a double-precision floating-point number that is 64 bits (8 bytes) long, and 8-byte binary value is roughly equivalent to 15 digits of decimal precision, so comparing a decimal(9,6) which is only 5 bytes, isn't exactly a fair comparison. Decimal would have to be a minimum o...
Sanitizing strings to make them URL and filename safe?
...ovides:
canonicalize (string $input, [bool $strict = true])
decodeFromBase64 (string $input)
decodeFromURL (string $input)
encodeForBase64 (string $input, [bool $wrap = false])
encodeForCSS (string $input)
encodeForHTML (string $input)
encodeForHTMLAttribute (string $input)
encodeForJavaScript (str...
How does the Java 'for each' loop work?
...Test B: 220,770,915 nanoseconds
B faster by 155,019,903 nanoseconds (40.75164734599769% faster)
[C:\java_code\]java TimeIteratorVsIndexIntArray 1000000
Test A: 326,373,762 nanoseconds
Test B: 202,555,566 nanoseconds
B faster by 123,818,196 nanoseconds (37.437545972215744% faster)
I also ran this ...
Best practices for SQL varchar column length [closed]
...n UK are usually between 1-35 characters. If you decide to make it varchar(64), you're not really going to hurt anything... unless you're storing this guy's family name that's said to be up to 666 characters long. In that case, maybe varchar(1028) makes more sense.
And in case it's helpful, here's ...
App Inventor 2 BLE扩展源码分析 - WriteBytes vs WriteStrings 23字节硬编...
...23 - 1（null终止符）
为什么23字节不应硬编码：
1. MTU 是可协商的：BLE 4.2+ 支持协商更大的 MTU（最大512字节）
2. Android BLE 栈自动处理分片：gatt.writeCharacteristic() 会根据协商后的 MTU 自动分片
3. 硬编码过时了：这个值是 BLE 4.0 ...
How do I verify/check/test/validate my SSH passphrase?
...ic key has been saved in /tmp/my_key.pub.
The key fingerprint is:
de:24:1b:64:06:43:ca:76:ba:81:e5:f2:59:3b:81:fe rob@Robs-MacBook-Pro.local
The key's randomart image is:
+--[ RSA 2048]----+
| .+ |
| . . o |
| = . + |
| = + + |
| o = o S . |
| + = +...
What is the difference between char s[] and char *s?
...modify the contents of the array, the behavior is undefined.
GCC 4.8 x86-64 ELF implementation
Program:
#include <stdio.h>
int main(void) {
char *s = "abc";
printf("%s\n", s);
return 0;
}
Compile and decompile:
gcc -ggdb -std=c99 -c main.c
objdump -Sr main.o
Output contai...
Why does this method print 4?
...Windows has a default stack size of 320k in the 32-bit VM and 1024k in the 64-bit VM. You can read more here.
You can run using different stack sizes and you will see different values of cnt before the stack overflows-
java -Xss1024k RandomNumberGenerator
You don't see the value of cnt being ...