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Is iterating ConcurrentHashMap values thread safe?
...entHashMap<String, String>();
private final static int MAP_SIZE = 100000;
public static void main(String[] args)
{
new ConcurrentMapIteration().run();
}
public ConcurrentMapIteration()
{
for (int i = 0; i < MAP_SIZE; i++)
{
map.put("key" + i, UUID.randomUUID...
Verify if a point is Land or Water in Google Maps
...8&x=-159.9609375&y=13.239945499286312&max_results=3&radius=10000&geometry=true&with_field_names=true
You have to register and supply your key and selected layer number. You can search all their repository of available layers. Most of the layers are only regional, but you can...
Any way to declare a size/partial border to a box?
...and requires no superfluous markup:
div {
width: 350px;
height: 100px;
background: lightgray;
position: relative;
margin: 20px;
}
div:after {
content: '';
width: 60px;
height: 4px;
background: gray;
position: absolute;
bottom: -4px;
}
<div></div&g...
How do I shuffle an array in Swift?
...].shuffled()
// x == [2, 3, 1]
let fiveStrings = stride(from: 0, through: 100, by: 5).map(String.init).shuffled()
// fiveStrings == ["20", "45", "70", "30", ...]
var numbers = [1, 2, 3, 4]
numbers.shuffle()
// numbers == [3, 2, 1, 4]
Swift 4.0 and 4.1
These extensions add a shuffle() method to ...
How to find/identify large commits in git history?
...
+100
???? A blazingly fast shell one-liner ????
This shell script displays all blob objects in the repository, sorted from smallest to l...
Find nearest latitude/longitude with an SQL query
...
showClosest.php
<?PHP
/**
* Use the Haversine Formula to display the 100 closest matches to $origLat, $origLon
* Only search the MySQL table $tableName for matches within a 10 mile ($dist) radius.
*/
include("./assets/db/db.php"); // Include database connection function
$db = new database();...
Is there a use-case for singletons with database access in PHP?
...nswered Nov 1 '12 at 18:34
unity100unity100
77088 silver badges1616 bronze badges
...
What is an example of the Liskov Substitution Principle?
...ariant:
void invariant(Rectangle r) {
r.setHeight(200)
r.setWidth(100)
assert(r.getHeight() == 200 and r.getWidth() == 100)
}
However, this invariant must be violated by a correct implementation of Square, therefore it is not a valid substitute of Rectangle.
...
How to create a drop shadow only on one side of an element?
...
.box-shadow:after {
content:"";
position:absolute;
width:100%;
bottom:1px;
z-index:-1;
transform:scale(.9);
box-shadow: 0px 0px 8px 2px #000000;
}
<div id="box" class="box-shadow"></div>
UPDATE 3
All my previous answers have been using extr...
How do I force Postgres to use a particular index?
...st perform a sequence / primary key scan instead. Conclusion - there is no 100% reliable method to force some index usage for PostgreSql server.
– Agnius Vasiliauskas
May 17 '18 at 6:42
...