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When is assembly faster than C?
...les that still need compiler-specific code, see
Getting the high part of 64 bit integer multiplication: A portable version using uint64_t for 32x32 => 64-bit multiplies fails to optimize on a 64-bit CPU, so you need intrinsics or __int128 for efficient code on 64-bit systems.
_umul128 on Windo...
Assign pandas dataframe column dtypes
...-05-01
1 b 2 2018-05-02
df.dtypes
x object
y int64
z datetime64[ns]
dtype: object
and confirm the dtype is updated.
OLD/DEPRECATED ANSWER for pandas 0.12 - 0.16: You can use convert_objects to infer better dtypes:
In [21]: df
Out[21]:
x y
0 a 1
1 b 2
In ...
CDC:DrawText 多行显示文本（文本自动换行） - C/C++ - 清泛网 - 专注C/C++及内核技术
...都不能折行。
DT_TABSTOP：设置制表，参数uFormat的15"C8位（低位字中的高位字节）指定每个制表符的字符数，每个制表符的缺省字符数是8。
DT_TOP：正文顶端对齐（仅对单行）。DT_VCENTER：正文水平居中（仅对单行）。
...
How to multiply duration by integer?
... leave implicit numeric conversion out. After looking back on this that int64(...) * Duration makes much more sense than casting to Duration, which is just a basic violation of how units should work. Sadly that doesn't work. You really have to do Duration * Duration which is horrible.
...
Android adb not found
...e containing adb used to be 32bit. It worked fine on 32bit systems. But on 64bit systems you need to manually install the IA32 library.
For Debian based distributions try this:
sudo apt-get install libc6-i386 lib32stdc++6 lib32gcc1 lib32ncurses5
But since v24.0 platform-tools contains only 64bit...
Cross compile Go on OSX?
... make says: # Building compilers and Go bootstrap tool for host, darwin/amd64 but later on it actually ends up as: --- Installed Go for windows/386 in /usr/local/go Installed commands in /usr/local/go/bin so one shall observe ending rather than beginning of compiling the compiler.
...
Pandas DataFrame column to list [duplicate]
...ror saying TypeError: unhashable type: 'list'
– user3646105
May 20 '14 at 0:18
4
you can just do ...
What does multicore assembly language look like?
...res are part of the architectural state of logical processors within Intel 64 or IA-32 processors
supporting Intel Hyper-Threading Technology. The features can be subdivided into three groups:
Duplicated for each logical processor
Shared by logical processors in a physical processor
Sh...
Android Facebook integration with invalid key hash
...
md.update(signature.toByteArray());
Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
}
}
catch (NameNotFoundException e) {
}
catch (NoSuchAlgorithmException e) {
}
Modify "com.example.packagename" with your package name in the above coding without fail (y...