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How do I find the duplicates in a list and create another list with them?
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To remove duplicates use set(a). To print duplicates, something like:
a = [1,2,3,2,1,5,6,5,5,5]
import collections
print([item for item, count in collections.Counter(a).items() if count > 1])
## [1, 2, 5]
Note that Counter is not particularly efficient (timings) and probably overkil...
What is considered a good response time for a dynamic, personalized web application? [closed]
...lization, what is a good response time from the server (so excluding network latency and browser rendering time)? I'm thinking about sites like Facebook, Amazon, MyYahoo, etc. A related question is what is a good response time for a backend service?
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Elastic search, multiple indexes vs one index and types for different data sets?
I have an application developed using the MVC pattern and I would like to index now multiple models of it, this means each model has a different data structure.
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Bash history without line numbers
.... I understand why it shows the line numbers, but is there a way I can invoke the history command and suppress the line numbers?
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How do I count a JavaScript object's attributes? [duplicate]
...s you defined from those you got "for free."
Here's one way:
var foo = {"key1": "value1", "key2": "value2", "key3": "value3"};
Object.prototype.foobie = 'bletch'; // add property to foo that won't be counted
var count = 0;
for (var k in foo) {
if (foo.hasOwnProperty(k)) {
++count;
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What is the dual table in Oracle?
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Vishwanath Dalvi
30.2k3636 gold badges114114 silver badges144144 bronze badges
answered Sep 16 '08 at 15:45
Sean McMainsSe...
Writing a compiler in its own language
...are indeed created in this fashion, partially because language designers like to use the language they are creating, and also because a non-trivial compiler often serves as a useful benchmark for how "complete" the language may be.
An example of this would be Scala. Its first compiler was created ...
Get Value of a Edit Text field
...create UI elements. I have created a few EditText input fields. On the click of a Button I want to capture the content typed into that input field.
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Call Activity method from adapter
...Button btn = (Button) convertView.findViewById(yourButtonId);
btn.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
if (mContext instanceof YourActivityName) {
((YourActivityName)mContext).yourDesiredMethod();
}
}
});
replace with your ow...
Set database timeout in Entity Framework
My command keeps timing out, so I need to change the default command timeout value.
9 Answers
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