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Converting strings to floats in a DataFrame
How to covert a DataFrame column containing strings and NaN values to floats. And there is another column whose values are strings and floats; how to convert this entire column to floats.
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How to read integer value from the standard input in Java
...can also tokenize input with regular expression, etc. The API has examples and there are many others in this site (e.g. How do I keep a scanner from throwing exceptions when the wrong type is entered?).
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log4j configuration via JVM argument(s)?
...o I have to set/pass as arguments to the JVM to get log4j to run properly? And by properly I mean not complain and print to the console. Can I see a typical example?
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How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
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You can use the substringWithRange method. It takes a start and end String.Index.
var str = "Hello, playground"
str.substringWithRange(Range<String.Index>(start: str.startIndex, end: str.endIndex)) //"Hello, playground"
To change the start and end index, use advancedBy(n).
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What happened to console.log in IE8?
...available after you have opened the Developer Tools (F12 to toggle it open and closed).
Funny thing is that after you've opened it, you can close it, then still post to it via console.log calls, and those will be seen when you reopen it.
I'm thinking that is a bug of sorts, and may be fixed, but we ...
Your project contains error(s), please fix it before running it
I am developing a simple Android application. But when I run Eclipse, it shows the following error:
26 Answers
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How to undo another user’s checkout in TFS?
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There are at least 2 different ways to do this:
Command Line
There is a command-line utility called Tf.exe that comes with Team Explorer. Find the documentation here. It can be accessed by launching a Visual Studio Command Prompt window. The syntax of the command is:
tf undo...
Which browsers support ?
..., allowing them to load async with a "hack" (although a pretty solid one), and also allows rendering the page without waiting for ga.js to be retrieved.
The second part only affects compatible browsers that understand the async html attribute
FF 3.6+
FF for Android All Versions
IE 10+ ...
How do I calculate a point on a circle’s circumference?
... r * cos(a)
y = cy + r * sin(a)
Where r is the radius, cx,cy the origin, and a the angle.
That's pretty easy to adapt into any language with basic trig functions. Note that most languages will use radians for the angle in trig functions, so rather than cycling through 0..360 degrees, you're cycli...
QString to char* conversion
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const char* and char* are not the same type.
– Lightness Races in Orbit
Nov 15 '12 at 22:12
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