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How can I remove a button or make it invisible in Android?
... b = findViewById(R.id.button);
b.setVisibility(View.GONE);
or in xml:
<Button ... android:visibility="gone"/>
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Sqlite LIMIT / OFFSET query
...tax forms are a little confusing because they reverse the numbers:
LIMIT <skip>, <count>
Is equivalent to:
LIMIT <count> OFFSET <skip>
It's compatible with the syntax from MySQL and PostgreSQL. MySQL supports both syntax forms, and its docs claim that the second syntax...
How to create a fixed-size array of objects
...d().
var array = [SKSpriteNode]()
array.reserveCapacity(64)
for _ in 0..<64 {
array.append(SKSpriteNode())
}
If you know the minimum amount of elements you'll add to it, but not the maximum amount, you should rather use array.reserveCapacity(minimumCapacity: 64).
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Collection was modified; enumeration operation may not execute
...st instance, meaning you fixed a foreach problem by adding an additional (although quicker) foreach iteration.
– Groo
Jun 15 '15 at 13:26
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Is it possible to pass query parameters via Django's {% url %} template tag?
...the GET parameters are not part of the URL.
Simply add them to the end:
<a href="{% url myview %}?office=foobar">
For Django 1.5+
<a href="{% url 'myview' %}?office=foobar">
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How to sort findAll Doctrine's method?
...documentation, but I haven't been able to find a way to sort findAll() Results.
12 Answers
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How do I programmatically change file permissions?
... set of permissions with with PosixFilePermissions.asFileAttribute().
Set<PosixFilePermission> ownerWritable = PosixFilePermissions.fromString("rw-r--r--");
FileAttribute<?> permissions = PosixFilePermissions.asFileAttribute(ownerWritable);
Files.createFile(path, permissions);
In earl...
How to configure an existing git repo to be shared by a UNIX group
...etc. as root rather than as www-data or whatever the owner is and as a result you get error: insufficient permission for adding an object to repository database .git/objects. I thought I'd fixed the ownership of all files/directories that were wrong by using find and -type d/type -f, but only this ...
R data formats: RData, Rda, Rds etc
...bject, you can assign the contents of an Rds file. Not so for Rda
> x <- 1:5
> save(x, file="x.Rda")
> saveRDS(x, file="x.Rds")
> rm(x)
## ASSIGN USING readRDS
> new_x1 <- readRDS("x.Rds")
> new_x1
[1] 1 2 3 4 5
## 'ASSIGN' USING load -- note the result
> new_x2 <- l...
PUT vs. POST in REST
...his:
POST:
Used to modify and update a resource
POST /questions/<existing_question> HTTP/1.1
Host: www.example.com/
Note that the following is an error:
POST /questions/<new_question> HTTP/1.1
Host: www.example.com/
If the URL is not yet created, you
should not b...