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How to iterate over values of an Enum having flags?
...here's one way you can get them:
[Flags]
enum Items
{
None = 0x0,
Foo = 0x1,
Bar = 0x2,
Baz = 0x4,
Boo = 0x6,
}
var value = Items.Foo | Items.Bar;
var values = value.ToString()
.Split(new[] { ", " }, StringSplitOptions.None)
.Select(v =&g...
How can I download a specific Maven artifact in one command line?
...:
mvn dependency:get \
-DrepoUrl=http://.../ \
-Dartifact=com.foo.something:component:LATEST:jar \
-Dtransitive=false \
-Ddest=component.jar \
share
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improve this answ...
What is the max size of localStorage values?
... function canStore(strLen) {
try {
delete localStorage.foo;
localStorage.foo = Array(strLen + 1).join('A');
return true;
} catch (ex) {
return false;
}
}
function storageMaxBetween(low, high) {
return canStore(...
Elegant way to check for missing packages and install them?
...dependencies. So given a character vector of packages you wish to load...
foo <- function(x){
for( i in x ){
# require returns TRUE invisibly if it was able to load package
if( ! require( i , character.only = TRUE ) ){
# If package was not able to be loaded then re-install
...
What's the advantage of a Java enum versus a class with public static final fields?
...ion details (the name of the parameter). I can make an interface interface Foo { public void bar(String baz); }. Someone makes a class which invokes bar: someFoo.bar(baz = "hello");. I change the signature of Foo::bar to public void bar(String foobar). Now the person who called someFoo will need to ...
What is the HTML tabindex attribute?
...ess of where it is in relation to the rest of the code (it could be in the footer, content area, where-ever) if there is a defined tabindex then the tab order will start at the element which is explicitly assigned the lowest tabindex value above 0. It will then cycle through the elements defined an...
How can I get name of element with jQuery?
...
Play around with this jsFiddle example:
HTML:
<p id="foo" name="bar">Hello, world!</p>
jQuery:
$(function() {
var name = $('#foo').attr('name');
alert(name);
console.log(name);
});
This uses jQuery's .attr() method to get value for the first element i...
Why does Java's hashCode() in String use 31 as a multiplier?
...erent meaning. Yes, that implies that Map.of(42, 42).hashCode() or Map.of("foo", "foo", "bar", "bar").hashCode(), etc, are predictably zero. So don’t use maps as keys for other maps…
– Holger
Aug 30 '19 at 9:12
...
add column to mysql table if it does not exist
... the error with a declare continue handler:
delimiter ;;
create procedure foo ()
begin
declare continue handler for 1060 begin end;
alter table atable add subscriber_surname varchar(64);
end;;
call foo();;
I think its neater this way than with an exists subquery. Especially if you have a ...
Update value of a nested dictionary of varying depth
...eplacing an element such as an integer with a dictionary, such as update({'foo':0},{'foo':{'bar':1}}). This update addresses it:
import collections
def update(d, u):
for k, v in u.iteritems():
if isinstance(d, collections.Mapping):
if isinstance(v, collections.Mapping):
...