大约有 19,000 项符合查询结果（耗时：0.0466秒） [XML]
How is a CRC32 checksum calculated?
...re $1+1=0$. By putting the cofficients be in a field, then the polynomials form what is called a Euclidean Domain, which basically just allows what we're trying to do to be well-defined in the first place.
– calavicci
Nov 10 '15 at 23:11
...
Which is faster/best? SELECT * or SELECT column1, colum2, column3, etc
...
It still matters, because the select list is a form of contract, expecially if the SQL is in a stored procedure.
– Eric Z Beard
Sep 15 '08 at 23:22
4
...
Detecting 'stealth' web-crawlers
...e client claimed to be a legitimate spider but not on the whitelist, it performed DNS/reverse-DNS lookups to verify that the source IP address corresponds to the claimed owner of the bot. As a failsafe, these actions were reported to the admin by email, along with links to black/whitelist the addre...
How to determine if binary tree is balanced?
...ification for the function you are trying to write.
Specification: A well-formed binary tree is said to be "height-balanced" if (1) it is empty, or (2) its left and right children are height-balanced and the height of the left tree is within 1 of the height of the right tree.
Now that you have the...
How to delete an item in a list if it exists?
I am getting new_tag from a form text field with self.response.get("new_tag") and selected_tags from checkbox fields with
...
CSS3 :unchecked pseudo-class
...
This isn't always possible. Form elements in particular are notorious for not allowing you to revert them to their default look and feel via cascading rules. (Though why anyone would want to give only checked or only unchecked inputs a custom look and f...
Converting integer to binary in python
...
>>> '{0:08b}'.format(6)
'00000110'
Just to explain the parts of the formatting string:
{} places a variable into a string
0 takes the variable at argument position 0
: adds formatting options for this variable (otherwise it would repre...
How to detect input type=file “change” for the same file?
...he change event fire to post to the server. My example uses the the jQuery form plugin.
$('input[type=file]').click(function(){
$(this).attr("value", "");
})
$('input[type=file]').change(function(){
$('#my-form').ajaxSubmit(options);
})
...
How can I hash a password in Java?
... if (!m.matches())
throw new IllegalArgumentException("Invalid token format");
int iterations = iterations(Integer.parseInt(m.group(1)));
byte[] hash = Base64.getUrlDecoder().decode(m.group(2));
byte[] salt = Arrays.copyOfRange(hash, 0, SIZE / 8);
byte[] check = pbkdf2(password...
The calling thread must be STA, because many UI components require this
... Thanks. This will help when using Applicationcontext class instead of Form.
– SaddamBinSyed
Oct 23 '19 at 5:55
...