| Q | I have an ArrayList of known length, each element containing a comma separated string, some list members may be empty, the list starts empty and is built up. But the list elements start null, is there a way to initialise them? |
| A | def myArrayList = (0..99).collect { '' } |
| Q | I have done a git commit but want to append to the comments I have added. |
| A | In the root of your repository directory you will find a .git folder. In there there is a file "COMMIT_EDITMSG" which contains the comments for the current commit. To bring up the default editor (VIM, unless you have your custom editor specified in the [core] section of .gitconfig - located in the home directory - e.g. "editor = e:\\JGSoft\\EditPadPro6\\Editpadpro.exe, you can do git commit --amend |
| Q | I have looked at a lot of the Eclipse keyboard shortcut cheat sheet lists but I can't find a shortcut to change tab in the editor? |
| A | Use ctrl+e to pop up a list of the open tabs which you can scroll though to change focus. Alternatively, you can use ctrl+page-up / ctrl+page-down to navigate to the right/left tabs respectively. |
| Q | In Git you have your working tree and your repository but the necessary in-between state is the staging area. Files get staged by doing a git add. What's the opposite of a git add, i.e. how can I "unstage" a file? |
| A | As the handy command line help on a git status shows, files can be unstaged with git rm. |
| Q | How can I copy text in a cygwin window? |
| A | In the system menu, select properties and then Options | Edit Options | QuickEdit mode. You can then highlight text in the window and press enter to copy it to the clipboard. |
| Q | In Eclipse, ctrl+spacebar is not bringing up code completion? |
| A | Check for any shortcut collisions. On my machine I discovered that Dexpot's task switcher default shortcut is the same, it can be changed in configuration. I use Dexpot for Virtual Desktopping and it is a vital component of my toolkit. |
| Q | How can I change the class header in Eclipse to add a company copyright blurb? |
| A | The menu option Window | Preferences | Java | Code Style | Code Templates | Code | New java file shows: ${filecomment} ${package_declaration} ${typecomment} ${type_declaration} The text that gets substituted for ${filecomment} can be edited via Window | Preferences | Java | Code Style | Code Templates | Comments | Files. When editing the template you have the option in the GUI to insert variables and you can see which ones are available. This header will only shows up in new classes after choosing "Generate comments" in the new Java class wizard. |
