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蓝牙配对pin码设置 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...改过设备的 PIN 码，那么默认的 PIN 码很可能是 0000 或者 1234。自定义 PIN 码：为了更好地保护您的蓝牙设备，建议您将默认的 PIN 码更改为自定义的 PIN 码。您可以在蓝牙设备的设置中找到 PIN 码选项，然后输入您想要使用的数字...
Java string to date conversion
... fraction 978
A milli-of-day number 1234
n nano-of-second number 987654321
N nano-of-day number 1234000000
V time-zone ID zone-id America/Los_Angeles; Z; -08:30
z time-zone...
Is gcc's __attribute__((packed)) / #pragma pack unsafe?
...ruct s1 x;
struct s2 y;
};
int main()
{
union su s;
s.x.a = 0x1234;
s.x.b = 0x56789abc;
printf("sizeof s1 = %zu, sizeof s2 = %zu\n", sizeof(struct s1), sizeof(struct s2));
printf("s.y.a=%hx, s.y.b=%x\n", s.y.a, s.y.b);
return 0;
}
Output:
sizeof s1 = 6, sizeof s2 = 8...
Skip the headers when editing a csv file using Python
...amed indexing.
Given "foo.csv" as follows:
FirstColumn,SecondColumn
asdf,1234
qwer,5678
Use DictReader like this:
import csv
with open('foo.csv') as f:
reader = csv.DictReader(f, delimiter=',')
for row in reader:
print(row['FirstColumn']) # Access by column header instead of co...
Python's most efficient way to choose longest string in list?
...thon documentation itself, you can use max:
>>> mylist = ['123','123456','1234']
>>> print max(mylist, key=len)
123456
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java : convert float to String and String to float
...
String str = "1234.56";
float num = 0.0f;
int digits = str.length()- str.indexOf('.') - 1;
float factor = 1f;
for(int i=0;i<digits;i++) factor /= 10;
for(int i=str.length()-1;i>=0;i--){
if(str.charAt(i) == '.'){
fact...
Strip all non-numeric characters from string in JavaScript
...
If you need this to leave the dot for float numbers, use this
var s = "-12345.50 €".replace(/[^\d.-]/g, ''); // gives "-12345.50"
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...
C# Passing Function as Argument [duplicate]
...
}
public void Client()
{
double result = Diff(1.234, x => x * 456.1234);
double secondResult = Diff(2.345, MyFunctionMethod);
}
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Include only certain file types when searching in Visual Studio
....c* since the latter would select jquery custom files such as jquery.custom1234.js (which I usually use in most of my projects), of course if you don't you could just use *.c*.
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SOAP vs REST (differences)
...rameter "Accept" as application/xml or application/json for POST and /user/1234.json or GET /user/1234.xml for GET.
REST services are meant to be called by the client-side application and not the end user directly.
ST in REST comes from State Transfer. You transfer the state around instead of having...