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How to define object in array in Mongoose schema correctly with 2d geo index
...
trk : [{
lat : String,
lng : String
}]
or
trk : { type : Array , "default" : [] }
In the second case during insertion make the object and push it into the array like
db.update({'Searching criteria goes here'},
{
$push : {
trk : {
"lat": 50.3293714,
...
JavaScript for…in vs for
...
The choice should be based on the which idiom is best understood.
An array is iterated using:
for (var i = 0; i < a.length; i++)
//do stuff with a[i]
An object being used as an associative array is iterated using:
for (var key in o)
//do stuff with o[key]
Unless you have earth sh...
How to get the file extension in PHP? [duplicate]
...sh to get the file extension of an image I am uploading, but I just get an array back.
5 Answers
...
Python - Create a list with initial capacity
...1) * 1000.0))
return res
return wrapper
@print_timing
def prealloc_array (size, init = None, cp = True, cpmethod=copy.deepcopy, cpargs=(), use_num = False):
result = [None] * size
if init is not None:
if cp:
for i in range (size):
result[i] = init
else:
if u...
Generate random string/characters in JavaScript
...(n^2) behavior. If you want to create longer strings, you should create an array of individual characters and join them together at the end.
– dan_waterworth
May 10 '12 at 10:55
10...
Creating and Update Laravel Eloquent
...full example of what "lu cip" was talking about:
$user = User::firstOrNew(array('name' => Input::get('name')));
$user->foo = Input::get('foo');
$user->save();
Below is the updated link of the docs which is on the latest version of Laravel
Docs here: Updated link
...
How to print the full NumPy array, without truncation?
When I print a numpy array, I get a truncated representation, but I want the full array.
18 Answers
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JavaScript isset() equivalent
In PHP you can do if(isset($array['foo'])) { ... } . In JavaScript you often use if(array.foo) { ... } to do the same, but this is not exactly the same statement. The condition will also evaluate to false if array.foo does exists but is false or 0 (and probably other values as well).
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How to save an HTML5 Canvas as an image on a server?
...e dataURL
binary = atob(dataURL.split(',')[1])
# Create 8-bit unsigned array
array = []
i = 0
while i < binary.length
array.push binary.charCodeAt(i)
i++
# Return our Blob object
new Blob([ new Uint8Array(array) ], type: 'image/png')
And canvas code here:
canvas = documen...
How do I loop through or enumerate a JavaScript object?
...
Under ECMAScript 5, you can combine Object.keys() and Array.prototype.forEach():
var obj = { first: "John", last: "Doe" };
Object.keys(obj).forEach(function(key) {
console.log(key, obj[key]);
});
ECMAScript 6 adds for...of:
for (const key of Object.keys(obj)) {
cons...