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Ruby on Rails: How do I add placeholder text to a f.text_field?
....text_field :attr, placeholder: "placeholder text" %>
So rails 4+ can now use this syntax instead of the hash syntax
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Is there a “vim runtime log”?
...rints the most recent error message.
g< is another feature few people know about. From :help g<:
The g< command can be used to see the last page of previous command output. This is especially useful if you accidentally typed <Space> at the hit-enter prompt.
For example try :!ls...
:not(:empty) CSS selector is not working?
...o go away with just the input:empty. Perhaps I typed something wrong, who knows.
– animuson♦
Dec 26 '11 at 21:47
9
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What happens if you call erase() on a map element while iterating from begin to end?
...een improved/made consistent across all container types).
The erase method now returns the next iterator.
auto pm_it = port_map.begin();
while(pm_it != port_map.end())
{
if (pm_it->second == delete_this_id)
{
pm_it = port_map.erase(pm_it);
}
else
{
++pm_it;
...
How do I declare an array of weak references in Swift?
...lt;T>(&object) can change randomly (same with withUnsafePointer). I now use a version backed by a NSHashTable: gist.github.com/simonseyer/cf73e733355501405982042f760d2a7d.
– simonseyer
Feb 27 '18 at 15:42
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How could I use requests in asyncio?
... what you would write if you got Python 3.5+.
aiohttp supports http proxy now
import aiohttp
import asyncio
async def fetch(session, url):
async with session.get(url) as response:
return await response.text()
async def main():
urls = [
'http://python.org',
...
XML attribute vs XML element
...TA tags around this data. I would say, only use attributes when you 100% know what values are going to put in there, eg, a integer or a date, probably anything that is computer generated. If the BarCode was generated by a human then it should not be an attribute.
– John Ballin...
LoaderManager with multiple loaders: how to get the right cursorloader
... It works with Loader.getID()! I've doublechecked this right now. Great!
– Kay Gladen
Oct 31 '11 at 20:20
2
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What exactly is Python multiprocessing Module's .join() Method Doing?
...mon across many programming languages, so Python just adopted it as well.
Now, the reason you see the 20 second delay both with and without the call to join() is because by default, when the main process is ready to exit, it will implicitly call join() on all running multiprocessing.Process instanc...
How to add \newpage in Rmarkdown in a smart way?
...ppropriate. Your question is fine, so you don't have to close or delete it now, just leave it as it is.
– tonytonov
Aug 11 '14 at 11:12
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