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What is a difference between
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So if I read it right, "<? extends E>" requires that "?" is a subclass of "E", and "<? super E>" requires that "E" is a subclass of "?", right?
– El Suscriptor Justiciero
Jun 26 '18 ...
In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
In a Django form, how do I make a field read-only (or disabled)?
26 Answers
26
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How to access class constants in Twig?
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As of 1.12.1 you can read constants from object instances as well:
{% if var == constant('TYPE_PERSON', entity)
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file_put_contents - failed to open stream: Permission denied
...e to create a separate directory for files whose content must be changed.
Reading permissions (4) for a directory means being able to collect all files and directories with their metadata within a directory. Write permissions (2) gives the permission to change the content of the directory. Implying...
How to fix java.net.SocketException: Broken pipe?
...aused by:
most usually, writing to a connection when the other end has already closed it;
less usually, the peer closing the connection without reading all the data that is already pending at his end.
So in both cases you have a poorly defined or implemented application protocol.
There is a thi...
Convert HttpPostedFileBase to byte[]
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As Darin says, you can read from the input stream - but I'd avoid relying on all the data being available in a single go. If you're using .NET 4 this is simple:
MemoryStream target = new MemoryStream();
model.File.InputStream.CopyTo(target);
byte[...
Storing time-series data, relational or non?
... Form. Very high speed, with just one Index on the PK. For understanding, read this answer from the What is Sixth Normal Form ? heading onwards.
(I have one index only, not three; on the Non-SQLs you may need three indices).
I have the exact same table (without the Id "key", of course). I have ...
JavaScript REST client Library [closed]
...21,b:42});
// POST /api/rest/foo/ (with data a=21 and b=42)
client.foo.read();
// GET /api/rest/foo/
client.foo.read("42");
// GET /api/rest/foo/42/
client.foo.update("42");
// PUT /api/rest/foo/42/
client.foo.delete("42");
// DELETE /api/rest/foo/42/
//RESULTS USE '$.Deferred'
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Call a “local” function within module.exports from another function in module.exports?
... @NamNguyen Calling exports.foo() seems a little bit awkward and hard to read.
– Afshin Mehrabani
Jul 19 '14 at 12:20
4
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Extract a substring according to a pattern
...plit
sapply(strsplit(string, ":"), "[", 2)
## [1] "E001" "E002" "E003"
3) read.table
read.table(text = string, sep = ":", as.is = TRUE)$V2
## [1] "E001" "E002" "E003"
4) substring
This assumes second portion always starts at 4th character (which is the case in the example in the question):
substri...