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How to measure time taken by a function to execute
...
Using performance.now():
var t0 = performance.now()
doSomething() // <---- The function you're measuring time for
var t1 = performance.now()
console.log("Call to doSomething took " + (t1 - t0) + " milliseconds.")
NodeJs: it is required to import the performance clas...
Programmatically obtain the Android API level of a device?
...
What you need: http://developer.android.com/reference/android/os/Build.VERSION_CODES.html
SDK_INT value Build.VERSION_CODES Human Version Name
1 BASE Android 1.0 (no codename)
2 BASE_1_1 ...
Objective-C : BOOL vs bool
...
From the definition in objc.h:
#if (TARGET_OS_IPHONE && __LP64__) || TARGET_OS_WATCH
typedef bool BOOL;
#else
typedef signed char BOOL;
// BOOL is explicitly signed so @encode(BOOL) == "c" rather than "C"
// even if -funsigned-char is used.
#endif
#define...
C#操作XML小结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
C#操作XML小结C 操作XML小结。一、简单介绍
using System.Xml;
//初始化一个xml实例
XmlDocument xml=new XmlDocument();
//导入指定xml文件
xml.Load(path);
xml.Load(HttpContext.Current.Server.MapPath("~/file/bookstore.xml"));
//指定一个节点
XmlNode root=xml.Se...
Programmatically saving image to Django ImageField
... is a URL to an image
# self.photo is the ImageField
self.photo.save(
os.path.basename(self.url),
File(open(result[0], 'rb'))
)
self.save()
That's a bit confusing because it's pulled out of my model and a bit out of context, but the important parts are:
The image pulled from the we...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...方式来说十分重要。如果在中间更改了拓扑-即当骨干网操作员增加了新的路由器- 将破环终端节点上的应用，那么互联网将以非常快的速度陷入到崩塌的状态之中。
结论
这篇文章里所描述的结构...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...方式来说十分重要。如果在中间更改了拓扑-即当骨干网操作员增加了新的路由器- 将破环终端节点上的应用，那么互联网将以非常快的速度陷入到崩塌的状态之中。
结论
这篇文章里所描述的结构...
Django FileField with upload_to determined at runtime
...uploads so that if user joe uploads a file it goes to MEDIA_ROOT/joe as opposed to having everyone's files go to MEDIA_ROOT. The problem is I don't know how to define this in the model. Here is how it currently looks:
...
How to create Drawable from resource
...21+
Code would look something like this.
Drawable myDrawable;
if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP){
myDrawable = context.getResources().getDrawable(id, context.getTheme());
} else {
myDrawable = context.getResources().getDrawable(id);
}
...
简单谈谈软件配置管理 - 项目管理 - 清泛网 - 专注C/C++及内核技术
...版本设置规则”来标识版本。
在配置库中各种配置项的操作权限都应严格管理。我们一般是通过目录的访问权限来控制的，所以配置库的目录结构与配置项的访问权限也有着密切的关系，配置项的权限设置的原则如下：
a）基...