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What is the difference between a static and a non-static initialization code block
...nside Static Initializer.");
// fruits array
ArrayList<String> fruits = new ArrayList<>();
fruits.add("Apple");
fruits.add("Orange");
fruits.add("Pear");
// print fruits
for (String fruit : fruits) {
System.out.println...
string sanitizer for filename
I'm looking for a php function that will sanitize a string and make it ready to use for a filename. Anyone know of a handy one?
...
How do I use the nohup command without getting nohup.out?
...ting for you to bring it back to the foreground and type something. So the extra-safe version looks like this:
nohup command </dev/null >/dev/null 2>&1 & # completely detached from terminal
Note, however, that this does not prevent the command from accessing the terminal directl...
Convert JS date time to MySQL datetime
...ion twoDigits(d) {
if(0 <= d && d < 10) return "0" + d.toString();
if(-10 < d && d < 0) return "-0" + (-1*d).toString();
return d.toString();
}
/**
* …and then create the method to output the date string as desired.
* Some people hate using prototypes thi...
Comparing two files in linux terminal
...lt;' get lines from FILE1
'%>' get lines from FILE2
'' (empty string) for removing lines from both files.
E.g: diff --changed-group-format="%<" --unchanged-group-format="" file1.txt file2.txt
[root@vmoracle11 tmp]# cat file1.txt
test one
test two
test three
test four
test ei...
SQL Query Where Field DOES NOT Contain $x
...st
SELECT a FROM x WHERE x.b NOT IN (1, 2, 3, 6);
If you are searching a string, go for the LIKE operator (but this will be slow):
-- Finds all rows where a does not contain "text"
SELECT * FROM x WHERE x.a NOT LIKE '%text%';
If you restrict it so that the string you are searching for has to st...
BAT file: Open new cmd window and execute a command in there
...e-batch-commands-here"
/c Carries out the command
specified by string and then
terminates
/k Carries out the
command specified by string but
remains
Consult the cmd.exe documentation using cmd /? for more details.
The proper formating of the command string gets a little m...
Invoking a static method using reflection
...
// String.class here is the parameter type, that might not be the case with you
Method method = clazz.getMethod("methodName", String.class);
Object o = method.invoke(null, "whatever");
In case the method is private use getDecl...
Capturing Groups From a Grep RegEx
... name="${BASH_REMATCH[1]}"
echo "${name}.jpg" # concatenate strings
name="${name}.jpg" # same thing stored in a variable
else
echo "$f doesn't match" >&2 # this could get noisy if there are a lot of non-matching files
fi
done
It's better to put the ...
Any reason not to use '+' to concatenate two strings?
A common antipattern in Python is to concatenate a sequence of strings using + in a loop. This is bad because the Python interpreter has to create a new string object for each iteration, and it ends up taking quadratic time. (Recent versions of CPython can apparently optimize this in some cases, b...