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How to convert a data frame column to numeric type?
... 4 d 4
5 NA 5 5 e 5
Warning message:
In eval(m>ex m>pr, envir, enclos) : NAs introduced by coercion
but if you do same thing on fake_char and char_fac, you'll be lucky, and get away with no NA's:
> transform(d, fake_char = as.numeric(fake_char),
char_fa...
What is the best way to convert seconds into (Hour:Minutes:Seconds:Milliseconds) time?
...nsure that seconds is less than TimeSpan.MaxValue.TotalSeconds to avoid an m>ex m>ception.
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How do I insert NULL values using PDO?
...a value at the time of calling bindParam. I found this in a comment on the m>php m> docs:
bindValue(':param', null, PDO::PARAM_INT);
EDIT: P.S. You may be tempted to do this bindValue(':param', null, PDO::PARAM_NULL); but it did not work for everybody (thank you Will Shaver for reporting.)
...
unable to copy/paste in mingw shell
...ecause there is no Properties on the Menu. However with the above solution content, I was able to resolve it for Windows 10 as follows:
Right click the icon on the top left hand corner of MINGW64:
Select Options
Now Select keys
On the right hand you will find Shortcuts
If not thicked, thick Copy and...
What does “Mass Assignment” mean in Laravel?
...ll=\"#1BB76E\"/\u003e\u003c/svg\u003e\u003c/a\u003e",
contentPolicyHtml: "User contributions licensed under \u003ca href=\"https://stackoverflow.com/help/licensing\"\u003ecc by-sa\u003c/a\u003e \u003ca href=\"https://stackoverflow.com/legal/content-policy\"\u003e(content policy)...
When is a language considered a scripting language? [closed]
...people say "when it gets interpreted instead of compiled". That would make m>PHP m> (for m>ex m>ample) a scripting language. Is that the only criterion? Or are there other criteria?
...
How do I get the current time zone of MySQL?
...e to the system's timezone, which is less than helpful. Since you're using m>PHP m>, if the answer from MySQL is SYSTEM, you can then ask the system what timezone it's using via date_default_timezone_get. (Of course, as VolkerK pointed out, m>PHP m> may be running on a different server, but as assumptions go,...
What data is stored in Ephemeral Storage of Amazon EC2 instance?
...ll=\"#1BB76E\"/\u003e\u003c/svg\u003e\u003c/a\u003e",
contentPolicyHtml: "User contributions licensed under \u003ca href=\"https://stackoverflow.com/help/licensing\"\u003ecc by-sa\u003c/a\u003e \u003ca href=\"https://stackoverflow.com/legal/content-policy\"\u003e(content policy)...
Push Notifications in Android Platform
...Messaging and can be found here: developer.android.com/guide/google/gcm/indm>ex m>.html
– Ryan Berger
Jul 9 '12 at 1:04
On ...
How to create a drop-down list?
...1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:drawable/btn_dropdown"
android:spinnerMode="dropdown"/>
Java:
//get the spinner from the xml.
Spinner dropdown = findViewById(R.id.spinner1);
//create a list of items for th...