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Paste multiple columns together
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@roschu Either will work. Indexing a data.frame with a single character vector will be a column indexing, despite the first argument usually being the row index.
– Brian Diggs
Feb 15 '15 at 2:16
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@UniqueConstraint and @Column(unique = true) in hibernate annotation
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@jDub9 You cannot query an index. You can query the mask and group columns, in one query, and it will use that index for faster processing (if you are lucky), but you cannot simply query an index.
– Dalibor Filus
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Iterating through a list in reverse order in java
...nt for doing so is that the for loop is much cleaner than keeping track of indexes, or using an explicit iterator.
15 Answe...
WordPress is giving me 404 page not found for all pages except the homepage
...ded Modules' section.
If it's not, enable it - Look at your apache default index.html file for details - in Ubuntu, you do it with the helper a2enmod.
Verify that apache server is looking at the .htaccess file. open httpd.conf - or it's Ubuntu's alternative, /etc/apache2/apache2.conf. In it, You sho...
Find running median from a stream of integers
... elements to all be stored in memory). See below for another answer using indexable skiplists that only requires the most recently seen 100 elements be kept in memory.
– Raymond Hettinger
May 22 '12 at 5:42
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reducing number of plot ticks
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Only select first 3 datetime index. when get ax from pandas.DataFrame.plot ax = df.plot()
– Mithril
Nov 1 '19 at 2:27
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C# Java HashMap equivalent
...p.put(key, value)
MyObject value = myMap.get(key)
C#'s Dictionary uses [] indexing for setting/getting items
myDictionary[key] = value
MyObject value = myDictionary[key]
null keys
Java's HashMap allows null keys
.NET's Dictionary throws an ArgumentNullException if you try to add a null key
A...
What is context in _.each(list, iterator, [context])?
...ated
// so this[num] gets the item at the "num" index of
// someOtherArray.
}, someOtherArray);
Working Example: http://jsfiddle.net/a6Rx4/
It uses the number from each member of the Array being iterated to get the item at that index of someOt...
Rename column SQL Server 2008
...From the documentation:
sp_rename automatically renames the associated index whenever a PRIMARY KEY or UNIQUE constraint is renamed. If a renamed index is tied to a PRIMARY KEY constraint, the PRIMARY KEY constraint is also automatically renamed by sp_rename. sp_rename can be used to rename prim...
range over interface{} which stores a slice
...ll I used reflect.ValueOf and then if it is a slice you can call Len() and Index() on the value to get the len of the slice and element at an index. I don't think you will be able to use the range operate to do this.
package main
import "fmt"
import "reflect"
func main() {
data := []string{"o...