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How to prevent rm from reporting that a file was not found?
...y files. Sometimes the files are not present, so it reports many errors. I do not need this message. I have searched the man page for a command to make rm quiet, but the only option I found is -f , which from the description, "ignore nonexistent files, never prompt", seems to be the right choice,...
int a[] = {1,2,}; Weird comma allowed. Any particular reason?
...you just have to add a line. Likewise if you want to remove a line you can do so without worrying about whether it's the last line or not, and you can reorder lines without fiddling about with commas. Basically it means there's a uniformity in how you treat the lines.
Now think about generating cod...
Struct like objects in Java
...defensive programming - someday getters and setters may be helpful, and it doesn't cost a lot to create/use them. So they are sometimes useful.
In practice, most fields have simple getters and setters. A possible solution would look like this:
public property String foo;
a->Foo = b->Foo;...
Trigger 404 in Spring-MVC controller?
How do I get a Spring 3.0 controller to trigger a 404?
14 Answers
14
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Why should eval be avoided in Bash, and what should I use instead?
...t of println on each call, but for the sake of example, we're not going to do that. We'll need to use eval, since variables can't be used to redirect output.
function println
{
eval printf "$2\n" "${@:3}" $1
}
function error
{
println '>&2' '\e[31mError (%d): %s\e[m' "$1" "${*:2}"
...
Select Last Row in the Table
...d first() exists and provides you with the first file in the table but I don't know how to get the last insert.
16 Answer...
What is stack unwinding?
...when the scope is exited (here the scope is of the function func.) This is done by the compiler inserting calls to destructors of automatic (stack) variables.
Now this is a very powerful concept leading to the technique called RAII, that is Resource Acquisition Is Initialization, that helps us mana...
Split string into an array in Bash
...${array[0]}"
To iterate over the elements:
for element in "${array[@]}"
do
echo "$element"
done
To get both the index and the value:
for index in "${!array[@]}"
do
echo "$index ${array[index]}"
done
The last example is useful because Bash arrays are sparse. In other words, you can de...
How can the Euclidean distance be calculated with NumPy?
...
The linalg.norm docs can be found here: docs.scipy.org/doc/numpy/reference/generated/… My only real comment was sort of pointing out the connection between a norm (in this case the Frobenius norm/2-norm which is the default for norm funct...
How to change an Eclipse default project into a Java project
...
@Ricky It can be done via the UI in certain versions, with certain plugins.
– Chris Marasti-Georg
Apr 9 '13 at 13:45
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