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Query-string encoding of a Javascript Object
Do you know a fast and simple way to encode a Javascript Object into a string that I can pass via a GET Request?
40 Ans...
How does this print “hello world”?
...o group, then the 5-bits group gets isolated ANDing the number with the mask 31₁₀ = 11111₂ in the sentence l & 31
Now the code maps the 5-bit value to its corresponding 7-bit ascii character. This is the tricky part, check the binary representations for the lowercase
alphabet letters in t...
Cluster analysis in R: determine the optimal number of clusters
... in R, I'm not very sure how to choose the best number of clusters to do a k-means analysis. After plotting a subset of below data, how many clusters will be appropriate? How can I perform cluster dendro analysis?
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How to fix Array indexOf() in JavaScript for Internet Explorer browsers
If you have worked with JavaScript at any length you are aware that Internet Explorer does not implement the ECMAScript function for Array.prototype.indexOf() [including Internet Explorer 8]. It is not a huge problem, because you can extend the functionality on your page with the following code.
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Difference between break and continue statement
Can anyone tell me the difference between break and continue statements?
21 Answers
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What is memoization and how can I use it in Python?
... the remembered result rather than computing the result again. You can think of it as a cache for method results. For further details, see page 387 for the definition in Introduction To Algorithms (3e), Cormen et al.
A simple example for computing factorials using memoization in Python would be som...
Dynamically update values of a chartjs chart
I created an basic bar chart using chartjs and it works fine. Now I want to update the values on a time based interval. My problem is that after I created the chart, I do not know how to update its values correctly...
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Listing each branch and its last revision's date in Git
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commandlinefu has 2 interesting propositions:
for k in `git branch | perl -pe s/^..//`; do echo -e `git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k -- | head -n 1`\\t$k; done | sort -r
or:
for k in `git branch | sed s/^..//`; do echo -e `git log -1 --pretty=form...
How to swap keys and values in a hash
How do I swap keys and values in a Hash?
6 Answers
6
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Sorting multiple keys with Unix sort
I have potentially large files that need to be sorted by 1-n keys. Some of these keys might be numeric and some of them might not be. This is a fixed-width columnar file so there are no delimiters.
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