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What's the best name for a non-mutating “add” method on an immutable collection?
...an to assume incorrectly he knows what Add does.
Other operations borrowed from functional languages often keep their original names, with no apparent catastrophes. I haven't seen any push to come up with synonyms for "map" and "reduce" that sound more familiar to non-FPers, nor do I see any benefi...
One-liner to check whether an iterator yields at least one element?
...oblem with this solution is that you can't actually use the returned value from the iterator if it's not empty, right?
– Ken Williams
Jan 3 '17 at 3:55
add a comment
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Can an html element have multiple ids?
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No. From the XHTML 1.0 Spec
In XML, fragment identifiers are of
type ID, and there can only be a
single attribute of type ID per
element. Therefore, in XHTML 1.0 the
id attribute is defined to be of type
ID. In orde...
“git pull” or “git merge” between master and development branches
...d a develop branch for working on a few changes. I need to merge changes from master into develop , but will eventually merge everything from develop into master . I have two different workflows in mind:
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Connecting to remote URL which requires authentication using Java
...obably have to --add-modules javax.xml.bind since they removed the package from the default classpath. And in Java11+ it's removed altogether, you need an external dependency again. Such is progress!
– Ed Randall
Aug 18 '19 at 7:01
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Can I use `pip` instead of `easy_install` for `python setup.py install` dependency resolution?
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Yes you can. You can install a package from a tarball or a folder, on the web or your computer. For example:
Install from tarball on web
pip install https://pypi.python.org/packages/source/r/requests/requests-2.3.0.tar.gz
Install from local tarball
wget https...
Passing functions with arguments to another function in Python?
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You can use the partial function from functools like so.
from functools import partial
def perform(f):
f()
perform(Action1)
perform(partial(Action2, p))
perform(partial(Action3, p, r))
Also works with keywords
perform(partial(Action4, param1=p))
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MySQL: Can't create table (errno: 150)
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From the MySQL - FOREIGN KEY Constraints Documentation:
If you re-create a table that was dropped, it must have a definition that conforms to the foreign key constraints referencing it. It must have the correct column nam...
Input text dialog Android
...= "";
Within the OnClickListener of your button (or in a function called from there):
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Title");
// Set up the input
final EditText input = new EditText(this);
// Specify the type of input expected; this, for example, s...
What do people find difficult about C pointers? [closed]
From the number of questions posted here, it's clear that people have some pretty fundemental issues when getting their heads around pointers and pointer arithmetic.
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