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BLE协议—广播和扫描 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的observer（扫描者）。
数据包：数据包Access Address为一个32bit的随机值，由Initiator生成。数据包，其实是数据信道上的空中包的简称，数据包只在数据信道上传输，即除37/38/39之外的其余37信道（BLE总共占用40个信道）。每建立一...
Converting numpy dtypes to native python types
...es to a native Python type:
import numpy as np
# for example, numpy.float32 -> python float
val = np.float32(0)
pyval = val.item()
print(type(pyval)) # <class 'float'>
# and similar...
type(np.float64(0).item()) # <class 'float'>
type(np.uint32(0).item()) # <class 'long...
foreach with index [duplicate]
...magic.
– Kamil Szot
Nov 5 '13 at 21:32
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show 5 more comments
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Why do x86-64 systems have only a 48 bit virtual address space?
...is reply, we are already hitting these limits :) The HP Machine will have 320TB of memory and they can't provide it as a flat address space because of the 48-bit addressing limitation.
– agam
Aug 28 '15 at 19:27
...
Can you grab or delete between parentheses in vi/vim?
...would do the following:
printf("%3.0f\t%6.1f\n", fahr, ((5.0/9.0) * (fahr-32)));
^
Let's say your cursor is positioned at ^. Enter the following sequence to select the part you are looking for:
v2a)
First v enters Visual mode, then you specify that you want t...
How can I decompress a gzip stream with zlib?
...indowBits can also be greater than 15 for optional gzip decoding. Add
32 to windowBits to enable zlib and gzip decoding with automatic header
detection, or add 16 to decode only the gzip format (the zlib format will
return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->...
Could not load file or assembly … An attempt was made to load a program with an incorrect format (Sy
...
I am pretty sure you're having a 32-bit / 64-bit conflict. It sounds like your main project might be set to 32-bit while the class its referencing is set to 64-bit. Try looking at this SO question and this one too. Between the two of them, you should be able...
Convert integer to binary in C#
...
32
@kashif int value = Convert.ToInt32("1101", 2) would give value the value 13.
– flindeberg
Mar 5 '13...
Assign pandas dataframe column dtypes
...
output = io.StringIO()
output.write('A,1,20,31\n')
output.write('B,2,21,32\n')
output.write('C,3,22,33\n')
output.write('D,4,23,34\n')
output.seek(0)
df=pd.read_csv(output, header=None,
names=["A","B","C","D"],
dtype={"A":"category","B":"float32","C":"int32","D":"float64"},
...
What is the size of column of int(11) in mysql in bytes?
...t)
SMALLINT = 2 bytes (16 bit)
MEDIUMINT = 3 bytes (24 bit)
INT = 4 bytes (32 bit)
BIGINT = 8 bytes (64 bit).
The length just specifies how many characters to pad when selecting data with the mysql command line client. 12345 stored as int(3) will still show as 12345, but if it was stored as int(10...