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Split data frame string column into multiple columns
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5 years later adding the obligatory data.table solution
library(data.table) ## v 1.9.6+
setDT(before)[, paste0("type", 1:2) := tstrsplit(type, "_and_")]
before
# attr type type1 type2
# 1: 1 foo_and_bar foo bar
# 2: 30 foo_and_bar_2 foo ba...
How can I apply a function to every row/column of a matrix in MATLAB?
...elp/matlab/ref/rowfun.html), but the only "problem" is that it operates on tables (http://www.mathworks.se/help/matlab/ref/table.html) rather than matrices.
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Why Doesn't C# Allow Static Methods to Implement an Interface?
...designed to look at the statuc members as well? Don't the instances have a table of addresses for the implementation of theis methods? Couldn't the static methods be included in this table?
– Kramii
Nov 3 '08 at 16:03
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Javascript dynamically invoke object method from string
...orking for me using a variable inside a function:const genericResolver = ( table, action , values ) => { return Auth.isAuthenticated() .then(() => { return eval(table).findAll()
– stackdave
Oct 28 '17 at 14:57
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Why is f(i = -1, i = -1) undefined behavior?
... Usually the compiler will do indirect addressing to fetch a number form a table to avoid this. (-1 can be done in 1 instruction, but another example could be chosen).
– ctrl-alt-delor
Feb 11 '14 at 12:26
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Compare dates in MySQL
...ou for your help i got the answer.
here is the code.......
SELECT * FROM table
WHERE STR_TO_DATE(column, '%d/%m/%Y')
BETWEEN STR_TO_DATE('29/01/15', '%d/%m/%Y')
AND STR_TO_DATE('07/10/15', '%d/%m/%Y')
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How to insert element into arrays at specific position?
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@Artefacto "Arrays" in PHP are, in fact, ordered hash tables. PHP arrays act like arrays, but they are never really arrays; nor are they linked lists, or array lists.
– Frederik Krautwald
Aug 10 '14 at 11:31
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Interfaces — What's the point?
...alled "Order", whereas if you make the call to a C# object, it's already established that it implements that method, and the call can be made to such an such address.
– Boluc Papuccuoglu
May 11 '13 at 15:16
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Submitting a multidimensional array via POST with php
...p through the values.
if ( isset( $_POST['diameters'] ) )
{
echo '<table>';
foreach ( $_POST['diameters'] as $diam )
{
// here you have access to $diam['top'] and $diam['bottom']
echo '<tr>';
echo ' <td>', $diam['top'], '</td>';
e...
SQL Server: Make all UPPER case to Proper Case/Title Case
I have a table that was imported as all UPPER CASE and I would like to turn it into Proper Case. What script have any of you used to complete this?
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