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What are “named tuples” in Python?
...)
pt1 = Point(1.0, 5.0)
pt2 = Point(2.5, 1.5)
from math import sqrt
# use index referencing
line_length = sqrt((pt1[0]-pt2[0])**2 + (pt1[1]-pt2[1])**2)
# use tuple unpacking
x1, y1 = pt1
Thus, you should use named tuples instead of tuples anywhere you think object notation will make your code mo...
Non-Relational Database Design [closed]
...n SQL database: The results of running the view functions are stored in an index, and only the index can be queried. (As "get everything", "get key" or "get key range".)
The closest analogy in the SQL world would be if you could only query the DB using stored procedures - every query you want to su...
phantomjs not waiting for “full” page load
...nt.
var page = require("webpage").create(),
url = "http://example.com/index.html";
function onPageReady() {
var htmlContent = page.evaluate(function () {
return document.documentElement.outerHTML;
});
console.log(htmlContent);
phantom.exit();
}
page.open(url, functio...
I have an error: setOnItemClickListener cannot be used with a spinner, what is wrong?
...nife:
@OnItemSelected(R.id.spinner)
public void onSpinnerItemSelected(int index){
// ...
}
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glVertexAttribPointer clarification
...provide a number that specifies your own attribute. You pass this value as index. All your glVertexAttribPointer calls get queued up for the next time you call glDrawArrays or glDrawElements. If you have a VAO bound, the VAO will store the settings for all your attributes.
The main issue here is t...
Remove an item from array using UnderscoreJS
...y, if you want to modify the array in place you can use:
arr.splice(_.findIndex(arr, { id: 3 }), 1);
But that assumes that the element will always be found inside the array (because if is not found it will still remove the last element). To be safe you can use:
var index = _.findIndex(arr, { id:...
How could I ignore bin and obj folders from git repository?
...ck because I didn't understand that git rm only deletes the items from the index and not the disk. So if I understand correctly, your first two commands rebuilt the index by deleting everything from the index and adding everything back, applying the .gitignore filters. Then the commit makes it so i...
What's the best Django search app? [closed]
... We found that Sphinx was the least resource-intensive and fastest way to index and search our documents and that django-sphinx was a nice wrapper on top of the sphinx client.
The group by aggregation is particularly nice, if for example you want to display how many documents with a certain tag or...
How to maintain a Unique List in Java?
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A set is not a list, I cannot look up elements by index in a set in O(1) time (random access).
– wilmol
Sep 18 '19 at 1:32
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How can I delete one element from an array by value
... It will remove all occurrences of 3 and has nothing to do with the arrays index or position.
– bkunzi01
Jun 11 '16 at 15:33
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