大约有 14,600 项符合查询结果（耗时：0.0373秒） [XML]
How to negate the whole regex?
...:
^(?!(?:m{2}|t)$).*$
(?!(?:m{2}|t)$) is a negative lookahead; it says "starting from the current position, the next few characters are not mm or t, followed by the end of the string." The start anchor (^) at the beginning ensures that the lookahead is applied at the beginning of the string. If...
Cannot push to Heroku because key fingerprint
... so, if you're pulling your hair out, try moving your ~/.ssh directory and starting a new one (you can then pull in keys one by one).
– Tom Carchrae
Apr 27 '12 at 14:01
...
What should every programmer know about security? [closed]
...trusted sources - use whitelists not blacklists
Plan for security from the start - it's not something you can bolt on at the end
Keep it simple - complexity increases the likelihood of security holes
Keep your attack surface to a minimum
Make sure you fail securely
Use defence in depth
Adhere to th...
How can I make gdb save the command history?
How can I set up gdb so that it saves the command history? When starting a new gdb session I'd like to use the arrow up keys to access the commands of the previous sessions.
...
What is the difference between ports 465 and 587?
...ng out email using SMTP protocol.
Port 465 is for smtps
SSL encryption is started automatically before any SMTP level communication.
Port 587 is for msa
It is almost like standard SMTP port.
MSA should accept email after authentication (e.g. after SMTP AUTH). It helps to stop outgoing spam when ne...
Socket.IO Authentication
...ave to our own socket.io handler file (explained
// just after this).
// Start server. This will start both socket.io and our optional
// AJAX API in the given port.
const port = 3000; // Move this onto an environment variable,
// it'll look more professional.
server.listen(po...
What happens when a computer program runs?
...ptions, etc.
+-----------+ 0x400
| interrupt | the interrupt vector table, starting from 0 and going to 1k, contained
| vector | the addresses of routines called when interrupts occurred. e.g.
| table | interrupt 0x21 checked the address at 0x21*4 and far-jumped to that
| | locat...
How to combine two or more querysets in a Django view?
...ng querysets from the same model, or for similar fields from a few models, Starting with Django 1.11 a QuerySet.union() method is also available:
union()
union(*other_qs, all=False)
New in Django 1.11. Uses SQL’s UNION operator to combine the results of two or more QuerySets. For exampl...
Problems with Android Fragment back stack
...on.remove(frag2).add(frag3) // frag3 on view
(here all misleading stuff starts to happen)
Remember that .addToBackStack() is saving only transaction not the fragment as itself! So now we have frag3 on the layout:
< press back button >
// System pops the back stack and find the following s...
Worst security hole you've seen? [closed]
...
The old IBM System 36 dumb terminals had a keyboard combination that started the recording of a macro. So when a terminal was not logged in, you could start the recording of a macro and leave it in that position. Next time someone logged in, the keystrokes would be recorded in the macro and th...