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Can a class extend both a class and implement an Interface
Can a class extend both an interface and another class in PHP?
Basically I want to do this:
3 Answers
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How to rename a single column in a data.frame?
...w_colname'
where
which(colnames(df) == 'old_colname')
returns by the index of the specific column.
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How to make Git “forget” about a file that was tracked but is now in .gitignore?
...ady being tracked.
To stop tracking a file you need to remove it from the index. This can be achieved with this command.
git rm --cached <file>
If you want to remove a whole folder, you need to remove all files in it recursively.
git rm -r --cached <folder>
The removal of the file...
What's the difference between deque and list STL containers?
...and, is implemented more like std::vector. It has constant access time by index, as well as insertion and removal at the beginning and end, which provides dramatically different performance characteristics than a list.
shar...
What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
What does ArrayIndexOutOfBoundsException mean and how do I get rid of it?
25 Answers
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PDO's query vs execute
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query runs a standard SQL statement and requires you to properly escape all data to avoid SQL Injections and other issues.
execute runs a prepared statement which allows you to bind parameters to avoid the need to escape or quote the parameters. execute will also perform better if you are repeat...
Angular ng-repeat Error “Duplicates in a repeater are not allowed.”
...w in [1,1,1]">
However, changing the above code slightly to define an index to determine uniqueness as below will get it working again.
// This will work
<div ng-repeat="row in [1,1,1] track by $index">
Official docs are here: https://docs.angularjs.org/error/ngRepeat/dupes
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Python Linked List
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@dimo414: Linked lists typically prohibit indexing (no linked_list[n]) because it would be O(n). Dequeues allow it, and perform it in O(1). However, linked lists, given an iterator into the list, can allow O(1) insertion and removal, whereas deques cannot (it's O(n),...
How to pretty-print a numpy.array without scientific notation and with given precision?
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['0.25276524', '2.283345', '-1.8822164', '0.69949927', '1.0285625']
The index of the array is accessible in the format string:
>>> ndprint(x, 'Element[{1:d}]={0:.2f}')
['Element[0]=0.25', 'Element[1]=2.28', 'Element[2]=-1.88', 'Element[3]=0.70', 'Element[4]=1.03']
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How to use ng-repeat for dictionaries in AngularJs?
...obj.name}} {{obj.surname}}</li> ... where items is a set of persons indexed by some key.
– giowild
Sep 17 '14 at 15:57
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