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Set default CRAN mirror permanent in R
How can I set a specific CRAN mirror permanently in R?
1 Answer
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iOS - How to set a UISwitch programmatically
I want to set my UISwitch to on or off programmatically. How would I do that? I am an iOS newbie.
5 Answers
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How to get ID of the last updated row in MySQL?
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I've found an answer to this problem :)
SET @update_id := 0;
UPDATE some_table SET column_name = 'value', id = (SELECT @update_id := id)
WHERE some_other_column = 'blah' LIMIT 1;
SELECT @update_id;
EDIT by aefxx
This technique can be further expanded to retriev...
In OS X Lion, LANG is not set to UTF-8, how to fix it?
I try to setup postgress in OS X Lion, and find that is not correctly setup the LOCALE environment var.
5 Answers
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How to add Action Bar from support library into PreferenceActivity?
...ompatDelegate;
import android.support.v7.widget.Toolbar;
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public class SettingsActivity extends PreferenceActivity {
private AppCompatDelegate mDelegate;
@Override
protected void onCreate(Bundle savedInstanceState) {
getDelegate().installViewFactory();
getDelegate()...
lose vim colorscheme in tmux mode
I'm running iterm2 and when I'm in tmux mode the colorscheme I have set in vim does not show up. Only the color scheme I've set in iterm. If I run vim from shell the colorscheme appears correct - its only when I'm in tmux mode.
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In a Bash script, how can I exit the entire script if a certain condition occurs?
...ript is meant to be run by another script, you may want to define your own set of status code with particular meaning. For example, 1 == tests failed, 2 == compilation failed. If the script is part of something else, you may need to adjust the codes to match the practices used there. For example, wh...
How can I disable editing cells in a WPF Datagrid?
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The WPF DataGrid has an IsReadOnly property that you can set to True to ensure that users cannot edit your DataGrid's cells.
You can also set this value for individual columns in your DataGrid as needed.
s...
How to echo shell commands as they are executed
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set -x or set -o xtrace expands variables and prints a little + sign before the line.
set -v or set -o verbose does not expand the variables before printing.
Use set +x and set +v to turn off the above settings.
On the fir...
Set value to null in WPF binding
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Actually TargetNullValue works just fine. What it does is set an equivalence between the given value and null. So in this case when the bound value is null it will display an empty string and when the target's value is the empty string it will set the bound value to null.
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