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iPhone: How to get current milliseconds?
...s since epoch as a double. I'm almost sure you can access the milliseconds from the fractional part.
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TypeScript and field initializers
... aboutMe() {
return `Hi, I'm ${this.name}, aged ${this.age} and from ${this.address}`;
}
}
// typescript field initializer (maintains "type" definition)
const john = Object.assign( new Person(), {
name: "John",
age: 29,
address: "Earth"
});
// initialized obje...
Using the rJava package on Win7 64 bit with R
...windows-i586.exe and jdk-8u172-windows-x64.exe and then the binary package from CRAN:
install.packages("rJava")
The binary package from CRAN should pick up on the jvm by itself. Experts only: to build rJava from source, you need the --merge-multiarch flag:
install.packages('rJava', type = 'sour...
Finding the index of an item in a list
... itertools.count() (which is pretty much the same approach as enumerate):
from itertools import izip as zip, count # izip for maximum efficiency
[i for i, j in zip(count(), ['foo', 'bar', 'baz']) if j == 'bar']
This is more efficient for larger lists than using enumerate():
$ python -m timeit -s...
Create a GUID in Java
...ID initialized to a specific value you can use the UUID constructor or the fromString method.
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Conventions for exceptions or error codes
...I prefer exceptions because
they interupt the flow of logic
they benefit from class hierarchy which gives more features/functionality
when used properly can represent a wide range of errors (e.g. an InvalidMethodCallException is also a LogicException, as both occur when there's a bug in your code ...
Requirejs why and when to use shim config
I read the requirejs document from here API
3 Answers
3
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Using Selenium Web Driver to retrieve value of a HTML input
... That's what I've bumped into right now: trying to get a value from a textarea, which is neither a "value" attribute, nor a between-tag text (set dynamically as "value" attribute.
– C-F
Jun 5 '17 at 22:03
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Efficient evaluation of a function at every cell of a NumPy array
...ion to how vectorize determines the return type. That has produced bugs. frompyfunc is a bit faster, but returns a dtype object array. Both feed scalars, not rows or columns.
– hpaulj
Jul 31 '16 at 12:34
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How do I reflect over the members of dynamic object?
I need to get a dictionary of properties and their values from an object declared with the dynamic keyword in .NET 4? It seems using reflection for this will not work.
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