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How to determine if Javascript array contains an object with an attribute that equals a given value?
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2018 edit: This answer is from 2011, before browsers had widely supported array filtering methods and arrow functions. Have a look at CAFxX's answer.
There is no "magic" way to check for something in an array without a loop. E...
Spring: how do I inject an HttpServletRequest into a request-scoped bean?
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115
Request-scoped beans can be autowired with the request object.
private @Autowired HttpServlet...
How to overload std::swap()
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135
The right way to overload swap is to write it in the same namespace as what you're swapping, s...
Combine two ActiveRecord::Relation objects
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edited Jul 8 '19 at 6:08
answered Mar 2 '12 at 21:55
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Set a default parameter value for a JavaScript function
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From ES6/ES2015, default parameters are in the language specification.
function read_file(file, delete_after = false) {
// Code
}
just works.
Reference: Default Parameters - MDN
Default function parameters allow formal parameter...
What is Python buffer type for?
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146
An example usage:
>>> s = 'Hello world'
>>> t = buffer(s, 6, 5)
>>>...
WITH (NOLOCK) vs SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
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106
They are the same thing. If you use the set transaction isolation level statement, it will app...
How do I automatically update a timestamp in PostgreSQL
...ULT value:
CREATE TABLE users (
id serial not null,
firstname varchar(100),
middlename varchar(100),
lastname varchar(100),
email varchar(200),
timestamp timestamp default current_timestamp
)
Note that the value for that column can explicitly be overwritten by supplying a value in the...
Real mouse position in canvas [duplicate]
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The Simple 1:1 Scenario
For situations where the canvas element is 1:1 compared to the bitmap size, you can get the mouse positions by using this snippet:
function getMousePos(canvas, evt) {
var rect = canvas.getBoundingClientRect...
Is there a “vim runtime log”?
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169
running vim with the -V[N] option will do a pretty hefty runtime log, here N is the debug leve...