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How do I delete rows in a data frame?
...ou can delete rows of a data.frame by number as per the top answer. I.e.,
newdata <- myData[-c(2, 4, 6), ]
However, if you are trying to write a robust data analysis script, you should generally avoid deleting rows by numeric position. This is because the order of the rows in your data may c...
Select datatype of the field in postgres
...s from the information_schema (8.4 docs referenced here, but this is not a new feature):
=# select column_name, data_type from information_schema.columns
-# where table_name = 'config';
column_name | data_type
--------------------+-----------
id | integer
default_printer_...
How to find out what group a given user has?
...l = function(e) {
var $elem = $('.new-login-left'),
docViewTop = $window.scrollTop(),
docViewBottom = docViewTop + $window.height(),
...
How to convert SSH keypairs generated using PuTTYgen (Windows) into key-pairs used by ssh-agent and
...
I assume this is something new, but if you open your private key in puttygen, then it will automatically show you an OpenSSH compatible, copyable, public key string in the UI.
– UpTheCreek
May 3 '15 at 18:55
...
Passing an array as a function parameter in JavaScript
...
In ES6 standard there is a new spread operator ... which does exactly that.
call_me(...x)
It is supported by all major browsers except for IE.
The spread operator can do many other useful things, and the linked documentation does a really good job ...
findViewById in Fragment
...s is the correct way to setup listeners on fragments... Perhaps this was a new development in the API.
– Sonny
Oct 8 '14 at 22:11
...
Renew Provisioning Profile
...g profile for one of my apps is about to expire. Is there some way I can renew the existing one or must I recreate a new one?
...
How do I align views at the bottom of the screen?
...on that will be aligned to the end and the bottom of the screen.
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_h...
SQL WHERE.. IN clause multiple columns
...o this derived table:
select * from table1 LEFT JOIN
(
Select CM_PLAN_ID, Individual_ID
From CRM_VCM_CURRENT_LEAD_STATUS
Where Lead_Key = :_Lead_Key
) table2
ON
table1.CM_PLAN_ID=table2.CM_PLAN_ID
AND table1.Individual=table2.Individual
WHERE table2.CM_PLAN_ID IS NOT NULL
...
Is there a JSON equivalent of XQuery/XPath?
...d saxon-java but I am not sure how that works w/json. And there is another new thing from Saxonica called Saxon-JS.
– charles ross
Mar 1 '18 at 18:21
...