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Go build: “Cannot find package” (even though GOPATH is set)
...o a subfolder of $GOPATH/src, e.g. $GOPATH/src/test
go install test should now create an executable in $GOPATH/bin that can be called by typing test into your terminal.
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What is the best way to trigger onchange event in react js
...is needed I found this comment very helpful:
The input logic in React now dedupe's change events so they don't fire
more than once per value. It listens for both browser onChange/onInput
events as well as sets on the DOM node value prop (when you update the
value via javascript). This has...
Providing a default value for an Optional in Swift?
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Update
Apple has now added a coalescing operator:
var unwrappedValue = optionalValue ?? defaultValue
The ternary operator is your friend in this case
var unwrappedValue = optionalValue ? optionalValue! : defaultValue
You could also pr...
How to write a multidimensional array to a text file?
...8.00 199.00
# New slice
Reading it back in is very easy, as long as we know the shape of the original array. We can just do numpy.loadtxt('test.txt').reshape((4,5,10)). As an example (You can do this in one line, I'm just being verbose to clarify things):
# Read the array from disk
new_data = np...
How to convert OutputStream to InputStream?
...a OutputStream and second one, which accepts only InputStream . Do you know how to convert OutputStream to InputStream (not vice versa, I mean really this way) that I will be able to connect these two parts?
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Netty vs Apache MINA
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Update: Just use Netty. It is now a mature project with all the bells and whistles required for building protocol clients and servers. It has strong community with several active contributors backed by enterprises. It also has a book, 'Netty in Action'. I...
How do I find duplicates across multiple columns?
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With that, you can't know the id of each line.
– Juan.Queiroz
12 hours ago
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What's the best way to trim std::string?
...pp>
std::string str("hello world! ");
boost::trim_right(str);
str is now "hello world!". There's also trim_left and trim, which trims both sides.
If you add _copy suffix to any of above function names e.g. trim_copy, the function will return a trimmed copy of the string instead of modifying...
data.table vs dplyr: can one do something well the other can't or does poorly?
...ters. As Grace Hopper would say, Mind your nanoseconds!
3. Syntax
Let's now look at syntax. Hadley commented here:
Data tables are extremely fast but I think their concision makes it harder to learn and code that uses it is harder to read after you have written it ...
I find this remark poi...
How to export a Vagrant virtual machine to transfer it
...Machine** >> **Add**
4.) Run `vagrant box list` to see if vagrant acknowledges your machines.
5.) `git clone my_project`
6.) `vagrant up`
I had a few problems with VB Guest additions.
I fixed them with this solution.
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