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What are the uses of the exec command in shell scripts? [closed]
...ere are some examples:
exec 3< thisfile # open "thisfile" for reading on file descriptor 3
exec 4> thatfile # open "thatfile" for writing on file descriptor 4
exec 8<> tother # open "tother" for reading and writing on fd 8
exec 6>> other # op...
What are the advantages of using a schema-free database like MongoDB compared to a relational databa
...ines your schema.
A clear path to horizontal scalability.
You'll need to read more about it and play with it to get a better idea. Here's an online demo:
http://try.mongodb.org/
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In log4j, does checking isDebugEnabled before logging improve performance?
...n. Therefore you're just adding bloat to your code and making it harder to read.
I personally use the Java 1.5 format calls in the String class like this:
Var myVar = new MyVar();
log.debug(String.format("My var is '%s', value: '%s'", myVar, myVar.someCall()));
I doubt there's much optimisation ...
How to write into a file in PHP?
... the above code also you can use file_put_contents for detail about how to read and write file you may refer to techflirt.com/file-handling-in-php
– Ankur Kumar Singh
Jul 7 '16 at 5:24
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How can I get a resource “Folder” from inside my jar File?
...er, loop on the Files inside that Folder and get a Stream to each file and read in the content... Assume that the File names are not determined before runtime... What should I do? Is there a way to get a list of the files inside a Folder in your jar File?
Notice that the Jar file with the resources...
Syntax for creating a two-dimensional array
...int[3][]; VS int array[][] = new int[][3]; ?? which one is legal as I have read both version somewhere.
– roottraveller
Jun 13 '17 at 9:40
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PHP - concatenate or directly insert variables in string
...uch a case (Variable interpolation), which I find easier to both write and read.
The result will be the same; and even if there are performance implications, those won't matter 1.
As a sidenote, so my answer is a bit more complete: the day you'll want to do something like this:
echo "Welcome $na...
How do I submit disabled input in ASP.NET MVC?
...
Can't you make the field readonly="readonly" instead of disabled="disabled"? A readonly field value will be submitted to the server while still being non-editable by the user. A SELECT tag is an exception though.
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set gvim font in .vimrc file
..._gvimrc.
Check the :help .gvimrc for details. In essence, on start-up VIM reads the .vimrc. After that, if GUI is activated, it also reads the .gvimrc. IOW, all VIM general settings should be kept in .vimrc, all GUI specific things in .gvimrc. (But if you do no use console VIM then you can simply f...
MySQL Insert into multiple tables? (Database normalization?)
...ver crashes). If you can live with "some have finished, others not", don't read on.
If however you decide "either all queries finish, or none finish - I do not want rows in some tables but no matching rows in others, I always want my database tables to be consistent", you need to wrap all statement...