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June 30, 2014
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bernate lazy loading exceptions are common with Vaadin if you don't handle them correctly. Usually, you will use a session-per-request pattern, which means that your entities will be deattached from the hbn session at the end of the http request. If you try to lazy load anything outside the same http request, a lazy loading exception will be thrown - unless you re-attach the entity to the active session. Kim L Dec 1 '10 at 10:37
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You're right about that, i.e., the case of lazy-loading problems when an object is used across multiple requests. With Vaadin you do need to understand where your objects are going to go between requests (including the possibility of serialization). Archie Dec 3 '10 at 3:44 quite similar to :r! The only difference as far as I can tell is that :r! opens a new line, :.! overwrites the current line. saffsd May 6 '09 at 14:41
This one is so cool Thanks... @saffsd: That single difference is a great thing: Now I can pass lines to sed or awk and have it replaced with the processed ouAn alternative to :.!date is to write "date" on a line and then run !$sh (alternatively having the command followed by a blank line and run !jsh). This will pipe the line to the "sh" shell and substitute with the output from the command. is actually a special case of :, which filters a range of lines (the current line when the range is .) through a command and replaces those lines with the output. I find :%! useful for filtering whole buffers Why pass a line to sed, when you can use the similar built-in ed/ex commands? Try running And also not 'c' etc. i.e. you can do: !!, number!!, !motion (e.g. !Gshell_command<cr> replace from current line to end of file ('G') with output of're slightly oversimplifying the issues encountered when using ORM sessions with Vaadin (or any stateful web framework actually). We found that struck the right balance when binding the life cycle of our ewy could also be yiw. viwc could also be ciw. But the vi... is probably easier to remember since you use it in a lot of cases.There's also "H" to take the cursor to the top line in the display, "M" to take it to the middle one, and "L" to put it on the bottom one. Not to be confused with "gg" and "G", which take you to the top or bottom of the buffer. All the things you're calling "cut" is "change". eg: C is change until the end of the line. Vim's equivalent of "cut" is "delete", done with d/D. The main difference between change and delete is that delete leaves you in normal mode but change puts you into a sort of insert mode (though you're still in the change command which is handy as the whole change can be repeated with also, zt and zb become just as usefule as zz with a setting like scrolloff=2 I thought this was for a list of things that not many people know. yy is very common, I would have thought. bye does not work when you are in the first character of the word. yiw always does. Andrea Francia Jul 3 '12 at 20:50
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