static

Build a static library for iOS - specifically spatialite

由 拜拜、爱过 提交于 2020-01-03 17:03:05
问题 First, please forgive and point out if I am to use some other protocol for referencing another thread/post. There was a previous thread how to compile spatialite for iOS where the top answer partly described building spatialite as a static library for iOS. The answer included the text: "Once you've drag n drop the .a (both are required to work in the simulator AND on the real hardware), you can initialize spatialite by just invoking spatialite_init(1) ." I am guessing this is translated to

Why should we use static calls in PHP?

由 泄露秘密 提交于 2020-01-03 16:46:39
问题 Why should we use static variables or static calls to static methods in PHP5? Maybe to improve performance? 回答1: We use static class variables to share data between all the instances of the class, and we use static methods (preferably private static ) to compute something required for the class functionality, but independent of the class instance state ( $this ). Performance is really not the reason for the existence of static -s. It's more like a side effect. 回答2: Using static classes allows

“undefined reference” to static field template specialization

由 荒凉一梦 提交于 2020-01-03 16:01:39
问题 I have and header with a template class, which has only static functions and fields. template<typename T> class Luaproxy { static std::map<std::string, fieldproxy> fields; static const char * const CLASS_NAME; static void addfields(); static int __newindex(lua_State * l){ //implemented stuff, references to fields... } //etc } As you can see some of the functions are only declared, because I intend to implement them with template specialization. In a .ccp file I have: struct test { int a; }

Static members in VB.NET

由 眉间皱痕 提交于 2020-01-03 15:53:05
问题 I used to write this: Private Sub Example() Static CachedPeople As List(Of MyApp.Person) If CachedPeople Is Nothing Then CachedPeople = New List(Of MyApp.Person) End If ...rest of code... End Sub But then wondered if I could reduce this to: Private Sub Example() Static CachedPeople As New List(Of MyApp.Person) ...rest of code... End Sub The question is, will the "New" bit only be executed once when the function is first executed but in the next call, it will already exist. Cheers, Rob. 回答1:

Inner Class has an implicit reference to the outer class and may can leak memory

由 不羁岁月 提交于 2020-01-03 13:41:13
问题 After learning about the inner class, I understand it has an implicit reference to the outer class. But my teacher told me that the best way is not use inner class, prefer to use static inner class. Because the inner class may leak memory. Can someone kindly explain about this? 回答1: In the answer to your comment (it would be unreadable if I posted it in the comments), where it belongs. Example of accesing inner class outside the outer. public class Dog { String name; } public class HugeKennel

Strange parse error with static concatenated string variable [closed]

由 泄露秘密 提交于 2020-01-03 13:31:14
问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 6 years ago . I'm getting this error: Parse error: syntax error, unexpected '.', expecting ',' or ';' in /var/(...)/config.php on line 5 With this (simplified) code: <

java序列化（一）

由 瘦欲@ 提交于 2020-01-03 12:15:58
今天我们来探讨一下java的序列化与反序列化。之前对此一直有概念，但是并没有真正的去测试。大家都知道，所谓的序列化就是把java代码读取到一个文件中，反序列化就是从文件中读取出对象。在网络传输过程中，我们也需要对对象进行序列化，因为一个对象是不能进行传输的。下面先上代码 package serializable; import java.io.*; public class SerializableTest implements Serializable { private static final Long serialVersionUID = 1L; private String name; public String sex; protected int age; private static int id; transient private float height; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public int getAge()

Android - getResources() and static

由 无人久伴 提交于 2020-01-03 09:05:13
问题 I've got a class public class Preferences extends PreferenceActivity implements OnSharedPreferenceChangeListener out of this I try to call a method from another class. This method contains: mFoo.setTextColor(getResources().getColor(R.color.orange)) But it doesn't work. It tells me getResources isn't static... how can I change this? 回答1: But it doesnt work, it tells me, getResources isnt static... how can i change? This means you are trying to call getResources() from a static method, rather

Multiple Threads passing an object reference to static helper method

由 好久不见. 提交于 2020-01-03 08:52:49
问题 I am just a beginner in Java and have stumbled upon multi-threaded applications. I know this question is similar to some posts here but I couldn't find a better answer for my query. Basically, I want to pass an object to a static method and the method will just return an output based on the values/properties of the object. For every call, I am creating a new instance of the object and there is no chance in any way that I will modify the object inside the method. Now, my question is, will JVM

C++ initialization of non constant static member variable?

由 穿精又带淫゛_ 提交于 2020-01-03 08:14:48
问题 I got a qualification error of the member variable 'objectCount'. The compiler also returns 'ISO C++ forbids in-class intialization of non-const static member'. This is the main class: #include <iostream> #include "Tree.h" using namespace std; int main() { Tree oak; Tree elm; Tree pine; cout << "**********\noak: " << oak.getObjectCount()<< endl; cout << "**********\nelm: " << elm.getObjectCount()<< endl; cout << "**********\npine: " << pine.getObjectCount()<< endl; } This is the tree class
订阅 static