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App Inventor 2 Encrypt.Security 安全性扩展：MD5哈希，SHA1和SHA256哈希...
...性。它必须是包含32个字符的字符串。
.aix 拓展下载：
cn.peterzhong.Encrypt.Security.aix
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Format a number as 2.5K if a thousand or more, otherwise 900
...rx, "$1") + si[i].symbol;
}
/*
* Tests
*/
var tests = [
{ num: 1234, digits: 1 },
{ num: 100000000, digits: 1 },
{ num: 299792458, digits: 1 },
{ num: 759878, digits: 1 },
{ num: 759878, digits: 0 },
{ num: 123, digits: 1 },
{ num: 123.456, digits: 1 },
{ num: 123.45...
Size of Matrix OpenCV
...So the size in terms of elements of elementary type is M.rows * M.cols * M.cn
To find the max element one can use
Mat src;
double minVal, maxVal;
minMaxLoc(src, &minVal, &maxVal);
share
|
...
In Ruby, how do I skip a loop in a .each loop, similar to 'continue' [duplicate]
...from within a block intentionally can be confusing. For instance:
def my_fun
[1, 2, 3].map do |e|
return "Hello." if e == 2
e
end
end
my_fun will result in "Hello.", not [1, "Hello.", 2], because the return keyword pertains to the outer def, not the inner block.
...
c++编译错误：invalid new-expression of abstract class type - C/C++ - ...
...全部需要实现，这样才能new 子类。
纯虚函数例如 void fun() = 0; 是纯虚函数，不是纯虚函数不作要求。
另外，void fun() { } 空函数体也是实现。
纯虚函数相当于C#中abstract抽象类。
=0 说明函数是抽象的方法...
c++编译错误：invalid new-expression of abstract class type - c++1y / s...
...实现，这样才能new 子类。
纯虚函数例如 void fun() = 0; 是纯虚函数，不是纯虚函数不作要求。
另外，void fun() { } 空函数体也是实现。
纯虚函数相当于C#中abstract抽象类。
=0 说明函数是...
Why is it wrong to use std::auto_ptr with standard containers?
...se of move semantics (its specification requires rvalue references), so it fundamentally requires C++11. However (and related) the C++11 Standard no longer says that an STL element type must be "copy-constructible" and "assignable"; being move-constructible and move-assignable suffices. Indeed uniqu...
How to POST raw whole JSON in the body of a Retrofit request?
...nvertion in the rest of your application code:
interface ServiceApi {
fun login(username: String, password: String) =
jsonLogin(createJsonRequestBody(
"username" to username, "password" to password))
@POST("/api/login")
fun jsonLogin(@Body params: RequestBod...
C# using streams
...sfer the strings to and from the stream as bytes. So
myStreamWriter.Write(123);
will write "123" (three characters '1', '2' then '3') to the stream. If you're dealing with text files (e.g. html), StreamReader and StreamWriter are the classes you would use.
Whereas
myBinaryWriter.Write(123);
w...
Validate that a string is a positive integer
...ue);
},
false
);
test("1", true);
test("1.23", false);
test("1234567890123", true);
test("1234567890123.1", false);
test("0123", false); // false because we don't handle leading 0s
test(" 123 ", false); // false because we don't handle whitespace
<label>
String:
<inp...