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为AppInventor2开发拓展(Extension) · App Inventor 2 中文网
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代码编写
采用自己较为熟悉的java开发环境就行,这里推荐使用VSCode,拓展目录在 appinventor-sources/appinventor/...
Sort an Array by keys based on another Array?
...adding the keys with data from your actual array:
$customer['address'] = '123 fake st';
$customer['name'] = 'Tim';
$customer['dob'] = '12/08/1986';
$customer['dontSortMe'] = 'this value doesnt need to be sorted';
$properOrderedArray = array_merge(array_flip(array('name', 'dob', 'address')), $custo...
Start a git commit message with a hashmark (#)
...
As you are able to have a commit message of "#123 Commit message" as well as comments in clients such as GitHub for Mac and SourceTree I guess is what these clients are doing yes?
– Phil Ostler
Feb 12 '14 at 11:47
...
Zip lists in Python
...
zip takes a bunch of lists likes
a: a1 a2 a3 a4 a5 a6 a7...
b: b1 b2 b3 b4 b5 b6 b7...
c: c1 c2 c3 c4 c5 c6 c7...
and "zips" them into one list whose entries are 3-tuples (ai, bi, ci). Imagine drawing a zipper horizontally from left to right.
...
What is a 'semantic predicate' in ANTLR?
...) throws Exception {
ANTLRStringStream in = new ANTLRStringStream("123, 456, 7 , 89");
NumbersLexer lexer = new NumbersLexer(in);
CommonTokenStream tokens = new CommonTokenStream(lexer);
NumbersParser parser = new NumbersParser(tokens);
parser.parse();
}...
Check if a key exists inside a json object
...ject sent is contain undefined or null
var objarray={
"passenger_id":"59b64a2ad328b62e41f9050d",
"started_ride":"1",
"bus_id":"59b8f920e6f7b87b855393ca",
"route_id":"59b1333c36a6c342e132f5d5",
"start_location":"",
"stop_location":""
}
elementCheck(objarray,function(list){
console.log("list");
)
...
Copy / Put text on the clipboard with FireFox, Safari and Chrome
...g-text-into-the-clipboard-with-javascript-in-firefox-safari-ie-opera-292559a2-cc6c-4ebf-9724-d23e8bc5ad8a/ (and so is it's Google cache)
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follow...
Blocks and yields in Ruby
... gift from foo!") if block_given?
end
foo(10)
# OK: called as foo(10)
foo(123) {|y| puts "BLOCK: #{y} How nice =)"}
# OK: called as foo(123)
# BLOCK: A gift from foo! How nice =)
Or, using the special block argument syntax:
def bar(x, &block)
puts "OK: called as bar(#{x.inspect})"
block....
AutoLayout with hidden UIViews?
...ints have a the same value for the Constant. The constraints marked A1 and A2 have their Priority set to 500, while the constraint marked B has it's Priority set to 250 (or UILayoutProperty.defaultLow in code).
Hook up constraint B to an IBOutlet. Then, when you hide the element, you just need to s...
Emulating a do-while loop in Bash
...google/cloud/compute/home/chetabahana/.docker/compose': checked out '24a28a7a306a671bbc430aa27b83c09cc5f1c62d'
Finished Step #0 - "gcloud"
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foll...
