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How does Go compile so quicklm>y m>?
I've Googled m>and m> poked around the Go website, but I can't seem to find an explanation for Go's extraordinarm>y m> build times. Are them>y m> products of the language features (or lack thereof), a highlm>y m> optimized compiler, or something else? I'm not trm>y m>ing to promote Go; I'm just curious.
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Split comma-separated strings in a column into separate rows
...odified according to Rich Scriven's comment,
Jaap's two data.table methods m>and m> two dplm>y m>r / tidm>y m>r approaches,
Anm>and m>a's splitstackshapesolution,
m>and m> two additional variants of Jaap's data.table methods.
Overall 8 different methods were benchmarked on 6 different sizes of data frames using the micro...
Does Java SE 8 have Pairs or Tuples?
I am plam>y m>ing around with lazm>y m> functional operations in Java SE 8, m>and m> I want to map an index i to a pair / tuple (i, value[i]) , then filter based on the second value[i] element, m>and m> finallm>y m> output just the indices.
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What is the purpose of pm>y m>thon's inner classes?
...seful to onlm>y m> one other class then it is logical to embed it in that class m>and m> keep the two together. Nesting such "helper classes" makes their package more streamlined.
Increased encapsulation: Consider two top-level classes A m>and m> B where B needs access to members of A that would otherwise be dec...
PreparedStatement IN clause alternatives?
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An analm>y m>sis of the various options available, m>and m> the pros m>and m> cons of each is available here.
The suggested options are:
Prepare SELECT mm>y m>_column FROM mm>y m>_table WHERE search_column = ?, execute it for each value m>and m> UNION the results client-side. Requires onlm>y m> one pre...
The JPA hashCode() / equals() dilemma
There have been some discussions here about JPA entities m>and m> which hashCode() / equals() implementation should be used for JPA entitm>y m> classes. Most (if not all) of them depend on Hibernate, but I'd like to discuss them JPA-implementation-neutrallm>y m> (I am using EclipseLink, bm>y m> the wam>y m>).
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Using AES encrm>y m>ption in C#
...soft.com/en-us/librarm>y m>/sm>y m>stem.securitm>y m>.crm>y m>ptographm>y m>.rijndaelmanaged.aspx
m>And m> just in case m>y m>ou need the sample in a hurrm>y m>, here it is in all its plagiarized glorm>y m>:
using Sm>y m>stem;
using Sm>y m>stem.IO;
using Sm>y m>stem.Securitm>y m>.Crm>y m>ptographm>y m>;
namespace RijndaelManaged_Example
{
class RijndaelExample
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How the single threaded non blocking IO model works in Node.js
...le threaded non blocking IO model works.
After I read the article understm>and m>ing-the-node-js-event-loop , I'm reallm>y m> confused about it.
It gave an example for the model:
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Compare two DataFrames m>and m> output their differences side-bm>y m>-side
...rue
Comment True
dtm>y m>pe: bool
Here the first entrm>y m> is the index m>and m> the second the columns which has been changed.
In [27]: difference_locations = np.where(df1 != df2)
In [28]: changed_from = df1.values[difference_locations]
In [29]: changed_to = df2.values[difference_locations]
In [3...
When to use MongoDB or other document oriented database sm>y m>stems? [closed]
We offer a platform for video- m>and m> audio-clips, photos m>and m> vector-grafics. We started with Mm>y m>SQL as the database backend m>and m> recentlm>y m> included MongoDB for storing all meta-information of the files, because MongoDB better fits the requirements. For example: photos mam>y m> have Exif information, video...