大约有 45,000 项符合查询结果（耗时：0.0613秒） [XML]
Maximum length of the textual representation of an IPv6 address?
...000
8 * 4 + 7 = 39
8 groups of 4 digits with 7 : between them.
But if you have an IPv4-mapped IPv6 address, the last two groups can be written in base 10 separated by ., eg. [::ffff:192.168.100.228]. Written out fully:
0000:0000:0000:0000:0000:ffff:192.168.100.228
(6 * 4 + 5) + 1 + (4 ...
Remove all special characters, punctuation and spaces from string
...ial $#! characters spaces 888323"
>>> ''.join(e for e in string if e.isalnum())
'Specialcharactersspaces888323'
You can use str.isalnum:
S.isalnum() -> bool
Return True if all characters in S are alphanumeric
and there is at least one character in S, False otherwise.
If you ins...
Download File to server from URL
...pfile.zip", fopen("http://someurl/file.zip", 'r'));
From the manual:
If data [that is the second argument] is a stream resource, the remaining buffer of that stream will be copied to the specified file. This is similar with using
stream_copy_to_stream().
(Thanks Hakre.)
...
How to programmatically determine the current checked out Git branch [duplicate]
...{branch_name##refs/heads/}
git symbolic-ref is used to extract fully qualified branch name from symbolic reference; we use it for HEAD, which is currently checked out branch.
Alternate solution could be:
branch_name=$(git symbolic-ref -q HEAD)
branch_name=${branch_name##refs/heads/}
branch_name=...
Razor view engine, how to enter preprocessor(#if debug)
I am writing my first razor page today, can't figure out how to enter #if debug #else #endif
9 Answers
...
Remove empty array elements
...all this for you:
print_r(array_filter($linksArray));
Keep in mind that if no callback is supplied, all entries of array equal to FALSE (see converting to boolean) will be removed. So if you need to preserve elements that are i.e. exact string '0', you will need a custom callback:
// PHP 7.4 and...
CGridCellNumeric - A numeric cell class for the MFC Grid - C/C++ - 清...
...s Maunder's MFC Grid 2.25 [^]. But unfortunately, for me it needed some modifications to get it to work the way I wanted. The one modification I present here is the CGridCellNumeric class, which is used to display and edit numbers and currencies. This class is a severe modification of the CGridCellN...
How can you automatically remove trailing whitespace in vim
...
Maybe you could explicit that the e at the end means, if we did not find the pattern, vi does not consider the substitute command as failed
– LLenain
Dec 1 '16 at 12:46
...
How does this site infecting script work?
...manually changed http: to evil:)
Note that the regex could have been simplified to .replace(/[#$@^&()!]/ig, '')
If you look at the script, you'll see that it's a very simple script that injects a hidden IFRAME containing the path /index.php?ys from the same domain.
I requested that page in Fi...
Benefits of prototypal inheritance over classical?
...
I know that this answer is 3 years late but I really think the current answers do not provide enough information about how prototypal inheritance is better than classical inheritance.
First let's see the most common arguments J...