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Setting up FTP on Amazon Cloud Server [closed]
... EC2 server. Log in to the AWS EC2 Management Console and select Security Groups from the navigation tree on the left. Select the security group assigned to your EC2 instance. Then select the Inbound tab, then click Edit:
Add two Custom TCP Rules with port ranges 20-21 and 1024-1048. For Sour...
Which Radio button in the group is checked?
...sing WinForms; Is there a better way to find the checked RadioButton for a group? It seems to me that the code below should not be necessary. When you check a different RadioButton then it knows which one to uncheck… so it should know which is checked. How do I pull that information without doing ...
Run task only if host does not belong to a group
...sk only if the host of the current playbook does not belong to a certain group. In semi pseudo code:
2 Answers
...
Named regular expression group “(?Pregexp)”: what does “P” stand for?
In Python, the (?P<group_name>…) syntax allows one to refer to the matched string through its name:
3 Answers
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MySQL DISTINCT on a GROUP_CONCAT()
I am doing SELECT GROUP_CONCAT(categories SEPARATOR ' ') FROM table . Sample data below:
6 Answers
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MySQL - Rows to Columns
... x-values
extend the base table with extra columns -- one for each x-value
group and aggregate the extended table -- one group for each y-value
(optional) prettify the aggregated table
Let's apply these steps to your problem and see what we get:
Step 1: select columns of interest. In the desired...
Argparse: Required arguments listed under “optional arguments”?
...” and “optional arguments” in the help are generated by two argument groups in which the arguments are automatically separated into. Now, you could “hack into it” and change the name of the optional ones, but a far more elegant solution would be to create another group for “required name...
Fixed width buttons with Bootstrap
...
If you place your buttons inside a div with class "btn-group" the buttons inside will stretch to the same size as the largest button.
eg:
<div class="btn-group">
<button type="button" class="btn btn-default">Left</button>
<button type="button" class="bt...
Postgresql GROUP_CONCAT equivalent?
...id_field, array_agg(value_field1), array_agg(value_field2)
FROM data_table
GROUP BY id_field
array_agg returns an array, but you can CAST that to text and edit as needed (see clarifications, below).
Prior to version 8.4, you have to define it yourself prior to use:
CREATE AGGREGATE array_agg (an...
Adding a column to a data.frame
...ep(z, times = len))
})
# when we unlist, we get a vector
your.df$group <- unlist(get.seq)
# and append it to your original data.frame. since this is
# designating a group, it makes sense to make it a factor
your.df$group <- as.factor(your.df$group)
no h_freq h_freqsq group...