大约有 30,000 项符合查询结果（耗时：0.0471秒） [XML]
Double Iteration in List Comprehension
...
I hope this helps someone else since a,b,x,y don't have much meaning to me! Suppose you have a text full of sentences and you want an array of words.
# Without list comprehension
list_of_words = []
for sentence in text:
for word in sentence:
list_of_words.append(word)
retur...
Command substitution: backticks or dollar sign / paren enclosed? [duplicate]
...irst form, using dollar sign and parentheses, is a newer POSIX form, which means it's probably a more standard way of doing it. In turn, I'd think that that means it's more likely to work correctly with different shells and with different *nix implementations.
Another reason given for preferring th...
CustomErrors mode=“Off”
... so setting the above entry to:
<deployment retail="false" />
now means that I can once again see the detailed error messages that I need to.
The machine.config is located at
32-bit
%windir%\Microsoft.NET\Framework\[version]\config\machine.config
64-bit
%windir%\Microsoft.NET\Framewor...
UnicodeDecodeError: 'charmap' codec can't decode byte X in position Y: character maps to
...t yourself. Common ones are Latin-1 and UTF-8. Since 0x90 doesn't actually mean anything in Latin-1, UTF-8 (where 0x90 is a continuation byte) is more likely.
You specify the encoding when you open the file:
file = open(filename, encoding="utf8")
...
How do I check if a column is empty or null in MySQL?
...wer of "onedaywhen". some_col = '' doesn't work on Oracle as empty strings mean NULL there.
– Johanna
May 18 '15 at 14:07
...
Where could I buy a valid SSL certificate? [closed]
I need to have a valid SSL certificate, by valid I mean not self signed. I don't want my customers to have to deal with the 'exception'.
...
When and why to 'return false' in JavaScript?
... the event to not actually fire. So, say, in the onsubmit case, this would mean that the form is not submitted.
share
|
improve this answer
|
follow
|
...
How can I benchmark JavaScript code? [closed]
...aving Firebug open disables Firefox’s Just-In-Time (JIT) compiler, which means the tests will be running in the interpreter, i.e. much slower than they would otherwise. Using Firebug’s profiler won’t give you the results you’d expect.
– Mathias Bynens
F...
Stack Memory vs Heap Memory [duplicate]
...the function. (caveat - compiler optimizations and calling conventions all mean things aren't this simple)
The stack is really best understood from a low level and I'd recommend Art of Assembly - Passing Parameters on the Stack. Rarely, if ever, would you consider any sort of manual stack manipulat...
Send response to all clients except sender
...ude sender
io.of('myNamespace').emit('message', 'gg');
// sending to individual socketid
socket.broadcast.to(socketid).emit('message', 'for your eyes only');
// list socketid
for (var socketid in io.sockets.sockets) {}
OR
Object.keys(io.sockets.sockets).forEach((socketid) => {});
...