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Split column at delimiter in data frame [duplicate]
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@Taesung Shin is right, but then just some more magic to make it into a data.frame.
I added a "x|y" line to avoid ambiguities:
df <- data.frame(ID=11:13, FOO=c('a|b','b|c','x|y'))
foo <- data.frame(do.call('rbind', strsplit(as.character(df$FOO),'...
Changing the selected option of an HTML Select element
...ML})
.Class({constructor: function() {}});
ng.bootstrap(App).then(function(app) {
app._hostComponent.instance.val = 3;
});
</script>
Demo
Vue 2
<div id="app">
<select v-model="val">
<option value="1">Cat</option>
<opt...
How can I redirect HTTP requests made from an iPad?
...y-html
sudo a2enmod proxy proxy_http proxy_html
sudo apache2ctl graceful
Then create a virtual host file, for example /etc/apache2/sites-available/my-proxy
Listen *:8080
<VirtualHost *:8080>
ProxyRequests On
<Proxy *>
Order Deny,Allow
Deny from all
All...
How can I pad a value with leading zeros?
... @Seaux, you said: "can't believe all the complex answers", and then started explaining yourself the complexity when commented. This means you understand that there are perspectives from which your answer is not perfect. Hence the complexity.
– Om Shankar
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What is the ideal data type to use when storing latitude / longitude in a MySQL database?
... if you need to store as integral part values from [0, 180] should be more then enough, right?
– Hrvoje Golcic
Jan 15 '14 at 20:05
39
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What is output buffering?
...iagram myself in Windows mspaint.exe.
If output buffering is turned off, then echo will send data immediately to the Browser.
If output buffering is turned on, then an echo will send data to the output buffer before sending it to the Browser.
phpinfo
To see whether Output buffering is tur...
What's the meaning of * (asterisk) in XAML ColumnDefinition?
...e width of the grid isn't fixed. When the grid is resized the columns will then scale proportionally as specified by the star widths. In your case the width of the grid is fixed and you could just as easily have used fixed width columns.
If you want a layout where the second column is double the wi...
The performance impact of using instanceof in Java
...Run it, until the jit-compiler gets a chance to optimize it itself. If you then have problems with this piece of code, use a profiler to tell you, where to gain the most and optimize this.
In times of highly optimizing compilers, your guesses about bottlenecks will be likely to be completely wrong....
How to connect to SQL Server database from JavaScript in the browser?
...on string, but a named DSN was OK :
I set up TestDSN and it tested OK, and then var strConn= "DSN=TestDSN"; worked, so I carried on experimenting for my in-house testing and learning purposes.
Our server has several instances running, e.g. server1\dev and server1\Test which made things slightly mor...
What does $1 [QSA,L] mean in my .htaccess file?
...
If the following conditions are true, then rewrite the URL:
If the requested filename is not a directory,
RewriteCond %{REQUEST_FILENAME} !-d
and if the requested filename is not a regular file that exists,
RewriteCond %{REQUEST_FILENAME} !-f
and if the re...