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Android: How to bind spinner to custom object list?
...le_spinner_item,
users);
mySpinner = (Spinner) findViewById(R.id.miSpinner);
mySpinner.setAdapter(adapter); // Set the custom adapter to the spinner
// You can create an anonymous listener to handle the event when is selected an spinner item
mySpinner.setO...
Is there a way to suppress JSHint warning for one given line?
...linted with JSHint.
/* jshint ignore:start */
// Code here will be ignored by JSHint.
/* jshint ignore:end */
// Code here will be linted with JSHint.
You can also ignore a single line with a trailing comment like this:
ignoreThis(); // jshint ignore:line
...
Dynamic variable names in Bash
... valid variable name, or a name with index (what if it was evil_code # ?). By contrast, all other methods below enforce it automatically.
# check that name is a valid variable name:
# note: this code does not support variable_name[index]
shopt -s globasciiranges
[[ "$name" == [a-zA-Z_]*([a-zA-Z_0-9]...
Can I update a component's props in React.js?
...e from the future: componentWillReceiveProps is outdated now: and replaced by a combination of getDerivedStateFromProps and componentDidUpdate.
– bvdb
Sep 21 '18 at 20:54
...
Java volatile reference vs. AtomicReference
...et has the memory effects of writing (assigning) a volatile variable.
By the way, that documentation is very good and everything is explained.
AtomicReference::lazySet is a newer (Java 6+) operation introduced that has semantics unachievable through volatile variables. See this post for more...
Maximum value for long integer
...erence (Python 2.x):
sys.maxint The largest positive integer supported by Python’s regular
integer type. This is at least 2**31-1. The largest negative integer
is -maxint-1 — the asymmetry results from the use of 2’s complement
binary arithmetic.
sys.maxsize The largest positive...
Can you use an alias in the WHERE clause in mysql?
...gregation. In the WHERE clause we restrict records we want from the tables by looking at their values. sum(reviews.rev_rating) and count(reviews.rev_id), however, are not values we find in a record; they are values we only get after aggregating the records.
So WHERE is inappropriate. We need HAVING,...
Should you declare methods using overloads or optional parameters in C# 4.0?
... that when you have a method that takes multiple (3+) parameters, that are by nature all "optional" (could be substituted with a default) you could end up with many permutations of the method signature for no more benefit. Consider Foo(A, B, C) requires Foo(A), Foo(B), Foo(C), Foo(A, B), Foo(A, C), ...
Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
...ed to add one more unique constraint, you had to drop the entire constrain by:
ALTER TABLE your_table DROP CONSTRAINT constraint_name;
Make sure tha the new constraint you wanted to add is unique/ not null ( if its Microsoft Sql, it can contain only one null value) across all data on that table, ...
Difference in months between two dates
..., I spent years writing code for Acturaries. Some calculations were divide by number of days, round up by 30 to get monthly figure. Sometimes counting months assumed every date starts on the first of the month, count whole months accordingly. There is no best method when it comes to calculating date...