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Get element inside element by class and ID - JavaScript
...can just get the first one (that's what the [0] is for—it's just like an array).
Then, you can change the html with .textContent.
targetDiv.textContent = "Goodbye world!";
var targetDiv = document.getElementById("foo").getElementsByClassName("bar")[0];
targetDiv.textContent = "Goodbye wor...
Conveniently map between enum and int / String
...
Using the values() array will only work if all your values are 0 indexed for their id and are declared in order. (I tested this to verify that if you declare FOO(0), BAR(2), BAZ(1); that values[1] == BAR and values[2] == BAZ despite the ids pas...
Identify duplicates in a List
... time when inserting into the HashSet(). This is because the internal hash array gets repeatedly resized. The inserts then average to something like O(log N) time. This means processing all N items becomes O(N log N) when it could have been O(N).
– johnstosh
Au...
Java: when to use static methods
...tate. But when you're testing stateless static methods like Math.abs() or Arrays.sort(), even methods you can pass all dependencies into, I don't see how that would ever impede unit testing. I would say a simple rule of thumb is: if you'd ever have any reason to mock out the procedural logic, then...
Access index of the parent ng-repeat from child ng-repeat
...p://docs.angularjs.org/api/ng.directive:ngRepeat, you can store the key or array index in the variable of your choice. (indexVar, valueVar) in values
so you can write
<div ng-repeat="(fIndex, f) in foos">
<div>
<div ng-repeat="b in foos.bars">
<a ng-click="addSomet...
angular.element vs document.getElementById or jQuery selector with spin (busy) control
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Why is angular injecting an array here?
– Peter
Aug 31 '18 at 9:54
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Assign variable in if condition statement, good practice or not? [closed]
...ing was – judging from the example – that the function would return an array. A quick test indicates that the condition evaluates to true only when the function returns true, but in all other cases (including when an array, string, number, or null is returned) it evaluates to false.
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How to get GET (query string) variables in Express.js on Node.js?
...on he was looking for a way to get all the query string parameters like an array. The correct answer is this: app.get('/', function(req, res){ console.log(req.query); });
– Richard Torcato
Jun 16 '16 at 11:07
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Converting int to bytes in Python 3
...d\r\n' % 3
b'3\r\n'
See PEP 0461 -- Adding % formatting to bytes and bytearray.
On earlier versions, you could use str and .encode('ascii') the result:
>>> s = '%d\r\n' % 3
>>> s.encode('ascii')
b'3\r\n'
Note: It is different from what int.to_bytes produces:
>>> n =...
How to list variables declared in script in bash?
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@Caesar No, I only tried non-empty arrays. Your are right in case of empty arrays – they are not printed.
– Socowi
Mar 12 '19 at 7:47
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