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In mysql 5.x Whats the difference if I do something like this: CREATE TABLE aTable ( id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY, aNumber bigint(20) DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARACTER SET=utf8; with this: CREATE TABLE aTable ( id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY, aNumber bigint(20) DEFAULT NULL ) ENGINE=InnoDB CHARACTER SET=utf8; Notice I am not specifying the character set as default in the first one. I couldn't find anything in the mysql docs. The word DEFAULT is optional there - so the two are equivalent, i.e. they set the default character set for the table. See the

std::map<int,int> mapy; ++mapy[5]; Is it safe to assume that mapy[5] will always be 1? I mean, will mapy[5] always get the default value of 0 before '++', even if not explicitly declared, as in my code? As soon as you access the map with the [] operator, if the key doesn't exist it gets added. The default initializer of the int type gets invoked - so it will get a value of 0. Yes, it is safe to assume. The map's operator[] is specified thus: ([map.access]) Effects: If there is no key equivalent to x in the map, inserts value_type(std::move(x), T()) into the map. Returns: A reference to the

This question already has answers here : C# 4.0: Can I use a TimeSpan as an optional parameter with a default value? (8 answers) How can I set default value for DateTime in optional parameter? public SomeClassInit(Guid docId, DateTime addedOn = DateTime.Now???) { //Init codes here } There is a workaround for this, taking advantage of nullable types and the fact that null is a compile-time constant. (It's a bit of a hack though, and I'd suggest avoiding it unless you really can't.) public void SomeClassInit(Guid docId, DateTime? addedOn = null) { if (!addedOn.HasValue) addedOn = DateTime.Now; /

How to change the default project directory in Netbeans 6.9 for Java SE\ME\EE? I don't think you can make it module-specific but you can set it as follows: Close NetBeans Find the projectui.properties file. For me (Windows) it was under C:\Documents and Settings\Catchwa\.netbeans\6.9\config\Preferences\org\netbeans\modules\projectui.properties The projectsFolder=C:\\NetBeansProjects variable is I think what you want to change. I found mine in a slightly different location (Windows 7 64-bit using Netbeans 7.2): C:\Users\UserName\AppData\Roaming\NetBeans\7.2\config\Preferences\org\netbeans

In my .vimrc I've put set foldmethod=syntax to enable folding of methods etc. However, I don't like the default that everytime I open a file, the whole thing is folded. Is there a way to enable foldmethod , yet have files unfolded when I open them? set foldlevel=99 should open all folds, regardless of method used for folding. With foldlevel=0 all folded, foldlevel=1 only somes, ... higher numbers will close fewer folds. You can put this in your .vimrc : au BufRead * normal zR It declares an automatic command ( au ), triggered when a buffer is read ( BufRead ), matching all files ( * ) and

It isn't looking nice when using EditText enabled="false". How can I change it automatically for all of the controls? I've added this image for reference. Can someone help me? Thanks. In the color file define your color: <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_enabled="false" android:color="@color/disabled_color" /> <item android:color="@color/normal_color"/> </selector> In the layout: <EditText android:text="whatever text you want" android:layout_width="wrap_content" android:layout_height="wrap_content"

Is there a reason to choose one of these over the other? DateTime myDate = new DateTime(); or DateTime myDate = default(DateTime); Both of them are equal 1/1/0001 12:00:00 AM . No, they are identical. default() , for any value type ( DateTime is a value type) will always call the parameterless constructor. If you want to use default value for a DateTime parameter in a method, you can only use default(DateTime). The following line will not compile: private void MyMethod(DateTime syncedTime = DateTime.MinValue) This line will compile: private void MyMethod(DateTime syncedTime = default(DateTime)