behavior

问题 I have this code <?php $a = "\\u0000"; $b = preg_quote($a); echo "<br />my own: ".$a; echo "<br />with preg_quote:". $b; ?> result is here How is possible that one \ character vanished from my $a variable? I think it's very begginer behavior/question but I'm really lost about these escape characters. Disclaimer: I'm not begginer in PHP 回答1: because \ escapes the next one, as every \ needs to be escaped. with a single \ it escapes the next character witch is u, but \u isn't a char code so it

问题 I have my class template here: import sqlite3 class Patron(object): #Let's set some basic attributes attributes = { "patron_id" : None, "name" : None, "address" : None, "phone" : None, "email" : None, "fee_balance" : None, "fees_per_day" : None, "books_checked_out" : [], "books_overdue" : []} def __init__(self): #Create a empty instance pass def new(self, patron_id, name, address, phone, email): #Create an instance with new values self.attributes["patron_id"] = patron_id self.attributes["name

问题 Using the following code as example: [DllImport("C:\\Users\\Rodrigo\\Desktop\\ds08_asio\\dsproEtherFaceAsio\\x64\\Debug\\dsproEtherFaceAsio.dll")] public static extern void open_console(); [DllImport("C:\\Users\\Rodrigo\\Desktop\\ds08_asio\\dsproEtherFaceAsio\\x64\\Debug\\dsproEtherFaceAsio.dll")] public static extern int get_available_interface(int index, [MarshalAs(UnmanagedType.LPWStr)] StringBuilder buffer, int maxSize); [DllImport("C:\\Users\\Rodrigo\\Desktop\\ds08_asio\

问题 I have a View which contains the userprofile of the current user. The view contains a viewmodel with a two-way binding to the single attributes like username or email adress. The view also has a behaviour, which validates the input and shows an error, of the input is not valid. Because of the two-way binding, the viewmodel updates the value even if the behavior says the input is wrong. I need to solve that. My current approach is to use include the behavior in the viewmodel as a attribute. So

问题 Ok, so I have been making a chat client in netbeans and I'm pretty much done. I decided to clean and build to test it standalone. However, when a message is received from the other program using sockets (Connection goes fine), the program closes. This issue never occurred when it was run straight from the IDE. So, what I am wondering is whether the program behaves differently(well it obviously does, but how?) once it is clean and built into a jar. Is there something extra I must take into

问题 May be I am misunderstand Spring Requires_new behavior. Here is my code: @Transactional(rollbackFor=Exception.class,propagation=Propagation.REQUIRED) public void outterMethod() throws Exception{ innerMethod1(); innerMethod2(); } @Transactional(rollbackFor=Exception.class,propagation=Propagation.REQUIRES_NEW) public void innerMethod1() throws Exception{ testService.insert(new Testbo("test-2", new Date())); } @Transactional(rollbackFor=Exception.class,propagation=Propagation.REQUIRES_NEW)

问题 H2 database has a command called SCRIPT to backup content and/or structure. It can be performed while the database is running. My question is: Does SCRIPT work like a snapshot? Does it only take statement and database content up until the SCRIPT command is issued? Or does it try to take additional statements performed by other processes into account while SCRIPT is being executed? EDIT To clarify the question, there are two ambiguities about the usage of SCRIPT: Does SCRIPT guarantee

问题 My use case for a game looks so: I have a LoadingActivity, which loads (by AsyncTask, but this doesn't matter) and stores all the graphics needed for the game in a static class. After the loading finished, the MenuActivity appears. From this Activity I can launch other Activities like LikeBeginActivity. This is the snippet of the manifest: <activity android:name="my.domain.mygame.LoadingActivity" android:alwaysRetainTaskState="true" android:screenOrientation="landscape"> <intent-filter>

问题 I working with BottomSheetDialog and i have to get Behavior so can set setBottomSheetCallback() to handle some stuff. As google says i had to put Coordinator on parentView and add behavior to it. I defined CoordinatorLayout in MainActivity (root activity) like this: <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:tag=

问题 I'm trying to get a function to increment alphas upwards in PHP from say A->ZZ or AAA -> ZZZ with all the variations in between, ie. A, B, C...AA, AB, AC..ZX, ZY, ZZ etc.. The following code works sometimes, but then breaks in certain instances, this example works perfectly. $from = "A"; $to = "ZZ"; while(strnatcmp($from, $to) <= 0) { echo $from++; } While this does not work as expected. $from = "A"; $to = "BB"; while(strnatcmp($from, $to) <= 0) { echo $from++; } Output is: First: A B C D ..