大约有 5,400 项符合查询结果（耗时：0.0296秒） [XML]
Fastest way to iterate over all the chars in a String
...e strings as byte[] by default.
SECOND UPDATE: As of 2016-10-25, on my AMDx64 8core and source 1.8, there is no difference between using 'charAt' and field access. It appears that the jvm is sufficiently optimized to inline and streamline any 'string.charAt(n)' calls.
THIRD UPDATE: As of 2020-09-07,...
Why is require_once so bad to use?
...calls are made:
time(NULL) = 1223772434
lstat64("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat64("/home/fbarnes", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat64("/home/fbarnes/phpperf", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat64("/home...
Keep only date part when using pandas.to_datetime
...the dates in my data. Pandas by default represents the dates with datetime64[ns] even though the dates are all daily only.
I wonder whether there is an elegant/clever way to convert the dates to datetime.date or datetime64[D] so that, when I write the data to CSV, the dates are not appended wi...
Error to run Android Studio
..._91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)
Check what compiler is used
javac -version
It should show something like this
javac 1.8.0_91
Finally, add JAVA_HOME to the environment variable
Edit /etc/environment and...
Android SDK Manager Not Installing Components
...roid Studio), do the following in Terminal
cd /android/adt-bundle-mac-x86_64/sdk/tools
sudo ./android sdk
This launches SDK manager as admin. Now update/install the packages from SDK manager and it'll work.
share
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Maximum number of records in a MySQL database table
...
2147483647 max, so you only have to make autoincrement bigint if you're working with multiple billions of entries? (which would probably just make your select statements melt down long before then)
– Kzqai
...
Win32 创建控件风格不是Win XP的解决方案 - C/C++ - 清泛网 - 专注C/C++及内核技术
... processorArchitecture="x86"
publicKeyToken="6595b64144ccf1df"
language="*"
/>
</dependentAssembly>
</dependency>
</assembly>
保存成一个后缀为：.manifest的文件，引入到.res文件中。
这样就行了。
还需...
Visual Studio 2013 Update 4【VS2013 SP4 旗舰版下载地址】 - 更多技术 - ...
...sual Studio 2013 Update 4【VS2013 SP4 旗舰版下载地址】vs2013没有64位版本，但是提供64位编译器，可以编译64位程序。Visual Studio Ultimate 2013 with Update 4 (x86) - DVD (Chinese...vs2013没有64位版本，但是提供64位编译器，可以编译64位程序。
Visual...
Linux平台编译curl：checking run-time libs availability... failed - 更...
Linux平台编译curl：checking run-time libs availability... failed64位编译1）configure过程失败如下， checking run-time libs availability failed configure: error: one or more libs av 64位编译
1）configure过程失败如下，
checking run-time libs availability...
astah（原jude）建模软件64bit社区版 - 软件下载 - 清泛网 - 专注C/C++及内核技术
astah（原jude）建模软件64bit社区版astah_jude_community_editionastah jude 建模对日开发常用的建模软件astah（原名：jude），社区版，免费使用，不可用做商业用途。
对日开发常用的建模软件astah（原名：jude），社区版，免费使用（功能...