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Understanding the ngRepeat 'track by' expression
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You can track by $index if your data source has duplicate identifiers
e.g.: $scope.dataSource: [{id:1,name:'one'}, {id:1,name:'one too'}, {id:2,name:'two'}]
You can't iterate this collection while using 'id' as identifier (duplicate id:1).
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What is the difference between user and kernel modes in operating systems?
...al_Descriptor_Table
the segment registers CS, DS, etc., which point to the index of an entry in the GDT.
For example, CS = 0 means the first entry of the GDT is currently active for the executing code.
What can each ring do?
The CPU chip is physically built so that:
ring 0 can do anything
ri...
How to assign from a function which returns more than one value?
...s to the original vector if you would rather reference the letter than the index:
> names(r) <- c("a","b")
> names(r)
[1] "a" "b"
> r["a"]
a
1
[Edit] Given that you will be applying min and max to each vector separately, I would suggest either using a matrix (if a and b will be the ...
Remove Primary Key in MySQL
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Without an index, maintaining an autoincrement column becomes too expensive, that's why MySQL requires an autoincrement column to be a leftmost part of an index.
You should remove the autoincrement property before dropping the key:
AL...
Java ArrayList replace at specific index
...reated an ArrayList of bulbs, and I'm trying to replace a bulb at specific index with another bulb. So with the following heading, how do I proceed?
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Add single element to array in numpy
...it overkill, but I always use the the np.take function for any wrap-around indexing:
>>> a = np.array([1, 2, 3])
>>> np.take(a, range(0, len(a)+1), mode='wrap')
array([1, 2, 3, 1])
>>> np.take(a, range(-1, len(a)+1), mode='wrap')
array([3, 1, 2, 3, 1])
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How long is the SHA256 hash?
...(64), or even a char(64), as the length is always the same, not varying at all.
And the demo :
$hash = hash('sha256', 'hello, world!');
var_dump($hash);
Will give you :
$ php temp.php
string(64) "68e656b251e67e8358bef8483ab0d51c6619f3e7a1a9f0e75838d41ff368f728"
i.e. a string with 64 character...
What does ON [PRIMARY] mean?
... drive D:\ of your server. you could then create another filegroup called Indexes. This filegroup could reside on drive E:\ of your server.
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Android ViewPager with bottom dots
... Simplify to this: private void setDotSelection(int index) { dot1.setImageResource(index == 0 ? R.drawable.circle_selected : R.drawable.circle); dot2.setImageResource(index == 1 ? R.drawable.circle_selected : R.drawable.circle); ...
How to lazy load images in ListView in Android
... exception 10-13 09:58:46.768: ERROR/AndroidRuntime(24250): java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 0 10-13 09:58:46.768: ERROR/AndroidRuntime(24250): at java.util.Vector.elementAt(Vector.java:331) 10-13 09:58:46.768: ERROR/AndroidRuntime(24250): at java.util.Vect...