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How Do I Choose Between a Hash Table and a Trie (Prefix Tree)?
...ow about accesing data from one structure vs the other? I'm thinking cache and location
– Horia Toma
Apr 14 '14 at 22:38
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What exactly does git's “rebase --preserve-merges” do (and why?)
Git's documentation for the rebase command is quite brief:
2 Answers
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Convert data.frame column to a vector?
...a frame is a list. When you subset a data frame using the name of a column and [, what you're getting is a sublist (or a sub data frame). If you want the actual atomic column, you could use [[, or somewhat confusingly (to me) you could do aframe[,2] which returns a vector, not a sublist.
So try run...
How can I initialise a static Map?
...ght? I don't see why you need an extra anonymous class just to initialize. And it won't work if the class being created is final.
You can create an immutable map using a static initialiser too:
public class Test {
private static final Map<Integer, String> myMap;
static {
Map&...
How to save traceback / sys.exc_info() values in a variable?
I want to save the name of the error and the traceback details into a variable. Here's is my attempt.
5 Answers
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Count the number of commits on a Git branch
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If you merge another branch into the current branch without fast forward and you do the above, the merge is also counted. This is because for git a merge is a commit.
If you don't want to count these commits add --no-merges:
git rev-list --no-merges --count HEAD ^develop
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What do parentheses surrounding an object/function/class declaration mean? [duplicate]
I'm new to both JavaScript and YUI . In YUI library examples, you can find many uses of this construct:
7 Answers
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Comparing date ranges
In MySQL, If I have a list of date ranges (range-start and range-end). e.g.
10 Answers
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Internet Explorer 8 Developer Tools not displaying
...es the developer tools window to be shrunk to the height of the header bar and width of about 2 inches. By using this solution you can then move the the window into view and enlarge as usual.
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How can I get Knockout JS to data-bind on keypress instead of lost-focus?
This example of knockout js works so when you edit a field and press TAB, the viewmodel data and hence the text below the fields is updated.
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