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【HarmonyOS】编译、测试全流程 - HarmonyOS NEXT - 清泛IT社区，为创新赋能！
...码（需签名HAP）
4.2 模拟器测试（无需签名）
模拟器是开发阶段最便捷的测试方式，不需要任何签名证书：
1. 编译生成未签名的 HAP 包
2. 打开 DevEco Studio 中的模拟器
3. 使用 HDC 命令安装：
hdc install your_app.hap
4. 或直接...
Is SHA-1 secure for password storage?
...tions.
About SHA-1 cost:
The elementary cost of SHA-1 is about hashing a 64-byte block. That's how SHA-1 works: data is padded, then split into 64-byte blocks. The cost of processing a single block is about 500 clock cycles on an Intel Core2 system, and that's for a single core. MD5 and MD4 are fa...
How do I safely pass objects, especially STL objects, to and from a DLL?
... datatypes have the same sizes regardless of whether your app is 32-bit or 64-bit. However, since the size of a given datatype is enforced by the compiler, not by any standard (all the standard guarantees is that 1 == sizeof(char) <= sizeof(short) <= sizeof(int) <= sizeof(long) <= sizeof...
Why is reading lines from stdin much slower in C++ than Python?
... 17
mmap 22
stat64 30
read_nocancel 25958
Python
./a.py < in
Read 6512402 lines in 1 seconds. LPS: 6512402
syscalls sudo dtruss -c ./a.py < in
CALL ...
How to plot two columns of a pandas data frame using points?
...es with millisecond precision. In trying to convert the objects to datetime64 type, I also discovered a nasty issue: < Pandas gives incorrect result when asking if Timestamp column values have attr astype >.
share
...
What would cause an algorithm to have O(log log n) complexity?
...48
2,048 / 2 = 1,024
1,024 / 2 = 512
512 / 2 = 256
256 / 2 = 128
128 / 2 = 64
64 / 2 = 32
32 / 2 = 16
16 / 2 = 8
8 / 2 = 4
4 / 2 = 2
2 / 2 = 1
This process takes 16 steps, and it's also the case that 65,536 = 216.
But, if we take the square root at each level, we get
√65,536 = 256
√256 = 16
...
Cordova 3.5.0 Install Error- Please Install Android Target 19
... you haven't installed lib32ncurses5 and lib32stdc++6 yet. (It happened on 64-bit Debian Jessie.)
– Theodor Keinstein
Sep 2 '14 at 16:03
1
...
What's the need of array with zero elements?
...xample_large_s
{
u32 first; // align to CL
u32 data;
....
u64 *second; // align to second CL after the first one
....
};
In code you can declare them using GCC extensions like:
__attribute__((aligned(CACHE_LINE_BYTES)))
But you still want to make sure this is enforced in ru...
Infinity symbol with HTML
...
bradbrad
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add...
Why does my application spend 24% of its life doing a null check?
...reading from sequential addresses. The unit of storage for the L1 cache is 64 bytes. Or in other words, once the processor reads one byte, the next 63 are very fast since they'll be present in the cache.
Which makes an array by far the most efficient data structure. Also the reason that the .NET Li...