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Why is using “for…in” for array iteration a bad idea?
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1581
The reason is that one construct:
var a = []; // Create a new empty array.
a[5] = 5; ...
How to write lists inside a markdown table?
...------------- |:-------------:| -----:|
| col 3 is | right-aligned | $1600 |
| col 2 is | centered | $12 |
| zebra stripes | are neat | $1 |
| <ul><li>item1</li><li>item2</li></ul>| See the list | from the first column|
Or pure HTML:
&l...
What is database pooling?
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+---------+
| |
| Clients |
+---------+ |
| |-+ (1) +------+ (3) +----------+
| Clients | ===#===> | Open | =======> | RealOpen |
| | | +------+ +----------+
+---------+ | ^
| | (2)
| ...
How can I undo git reset --hard HEAD~1?
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18 Answers
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Active
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Why should I use Deque over Stack?
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193
For one thing, it's more sensible in terms of inheritance. The fact that Stack extends Vector ...
How to remove a field from params[:something]
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214
Rails 4/5 - edited answer
(see comments)
Since this question was written newer versions of Rai...
Accessing an array out of bounds gives no error, why?
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17 Answers
17
Active
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Why does X[Y] join of data.tables not allow a full outer join, or a left join?
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To quote from the data.table FAQ 1.11 What is the difference between X[Y] and merge(X, Y)?
X[Y] is a join, looking up X's rows using Y (or Y's key if it has one) as an index.
Y[X] is a join, looking up Y's rows using X (or X's key if it has one)
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GB English, or US English?
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edited Mar 18 '16 at 10:36
answered Oct 1 '08 at 14:15
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Chrome: timeouts/interval suspended in background tabs?
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91
I recently asked about this and it is behaviour by design. When a tab is inactive, only at a max...