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Big-O summary for Java Collections Framework implementations? [closed]
...) O(1)
CopyOnWrite-ArrayList O(1) O(n) O(n) O(1) O(n) O(n)
Set implementations:
add contains next notes
HashSet O(1) O(1) O(h/n) h is the table capacity
LinkedHashSet O(1) O(1) O(1)
CopyOnWriteArraySet O(n) ...
Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
...data;
// oh crap, now we read the end and *only* now the eof bit will be set (as well as the fail bit)
// do stuff with (now uninitialized) data
}
Against this:
int data;
while(inStream >> data){
// when we land here, we can be sure that the read was successful.
// if it wasn't, the...
twitter bootstrap autocomplete dropdown / combobox with Knockoutjs
... editor after snippets, if snippets enabled
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Space between two rows in a table?
...Inserting an empty table row might work, but it's f'ugly. A bottom-border set to transparent might also work, but I'm not sure how cross-browser-compatible it is.
– Simon East
Feb 28 '12 at 6:28
...
How to get the first line of a file in a bash script?
...onents in a pipe will run in separate subshells. Meaning that $VAR will be set in subshell (that cease to exist as soon as the pipeline has finished executing) rather than in the invoking shell. You can get around this with read VAR <<EOF\n$(cat ...)\nEOF (where each \n is a newline).
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How to sort a file, based on its numerical values for a field?
...turns just the same results for this example
Edit:
Looks like the locale settings affect how the minus sign affects the order (see here). In order to get proper results I just did:
LC_ALL=C sort -n filename.txt
share
...
What are the complexity guarantees of the standard containers?
... elements from begin to end. O(n)
Accessors
v[i] Return (or set) the I'th element. O(1)
v.at(i) Return (or set) the I'th element, with bounds checking. O(1)
v.size() Return current number of elements. O(1)
v.empty() Return t...
Create a hexadecimal colour based on a string with JavaScript
I want to create a function that will accept any old string (will usually be a single word) and from that somehow generate a hexadecimal value between #000000 and #FFFFFF , so I can use it as a colour for a HTML element.
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Multiple Models in a single django ModelForm?
Is it possible to have multiple models included in a single ModelForm in django? I am trying to create a profile edit form. So I need to include some fields from the User model and the UserProfile model. Currently I am using 2 forms like this
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Check if database exists in PostgreSQL using shell
...p -w matches alphanumeric, digits and the underscore, which is exactly the set of characters allowed in unquoted database names in postgresql (hyphens are not legal in unquoted identifiers). If you are using other characters, grep -w won't work for you.
The exit status of this whole pipeline will...