大约有 40,000 项符合查询结果（耗时：0.0592秒） [XML]
extract part of a string using bash/cut/split
...bout sed? That will work in a single command:
sed 's#.*/\([^:]*\).*#\1#' <<<$string
The # are being used for regex dividers instead of / since the string has / in it.
.*/ grabs the string up to the last backslash.
\( .. \) marks a capture group. This is \([^:]*\).
The [^:] says any cha...
How to capitalize the first letter of word in a string using Java?
...lways clear which Locale to use...
– Christopher Schultz
Jul 12 '19 at 21:10
add a comment
|
...
How do I handle the window close event in Tkinter?
...o the interruption of graphics when one hard-closes the window (e.g. with Alt+F4).
– Apostolos
Apr 11 '18 at 23:45
|
show 1 more comment
...
Why can I access private variables in the copy constructor?
...involve two or more instances of your class: if you're comparing, adding/multiplying/dividing, copy-constructing, cloning, assigning etc. then it's often the case that you either simply must have access to private and/or protected data in the other object, or want it to allow a simpler, faster or ge...
Are lists thread-safe?
I notice that it is often suggested to use queues with multiple threads, instead of lists and .pop() . Is this because lists are not thread-safe, or for some other reason?
...
How do I get an empty array of any size in python?
... for x in range(N)] # N = size of list you want
a[i] = 5 # as long as i < N, you're okay
For lists of other types, use something besides 0. None is often a good choice as well.
share
|
impro...
Most efficient way to store thousand telephone numbers
... in the number c.
i := 0;
for K from 0 to ceil(99999 / 2^k) do
while i < a[K] do
print(c * 10^5 + K * 2^k + b[i]);
i := i + 1;
end do;
end do;
Maybe something goes wrong with the boundary case for K = ceil(99999/2^k), but that's easy enough to fix.
Finally, from an entropy point o...
Enum String Name from Value
... n = 1000;
Console.WriteLine ("\nGetName method way:");
for (int i = 0; i < n; i++) {
sw.Start ();
string t = Enum.GetName (typeof (Roles), roleValue);
sw.Stop ();
sum += sw.Elapsed.TotalMilliseconds;
sw.Reset ();
}
Console.WriteLine ($"Average of {n} runs using Getname method cast...
Set selected item of spinner programmatically
...mpleCursorAdapter) spnr.getAdapter();
for (int position = 0; position < adapter.getCount(); position++) {
if(adapter.getItemId(position) == value) {
spnr.setSelection(position);
return;
}
}
}
You can use the above like:
selectSpinnerItemByValue(s...
techniques for obscuring sensitive strings in C++
...em are free.
Password matching
Someone here discussed hashing password+salt.
If you need to store the key to match it against some kind of user submitted password, you should use a one-way hashing function, preferrably by combining username, password and a salt. The problem with this, though, ...