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How to execute shell command in Javascript
...l as an example, prerequisites are:
nodejs with npm
babel
Your example foo.js file may look like:
import { exec } from 'child_process';
/**
* Execute simple shell command (async wrapper).
* @param {String} cmd
* @return {Object} { stdout: String, stderr: String }
*/
async function sh(cmd) ...
Can I use conditional statements with EJS templates (in JMVC)?
...t, write the conditional inline? That is writing <% if (true) { include foo/bar } %> appears to error. Is there a method similar or is it necessary to break out the include by <% %>.
– kuanb
Sep 12 '16 at 21:48
...
Grunt watch error - Waiting…Fatal error: watch ENOSPC
...o find out who's making inotify instances, try this command (source):
for foo in /proc/*/fd/*; do readlink -f $foo; done | grep inotify | sort | uniq -c | sort -nr
Mine looked like this:
25 /proc/2857/fd/anon_inode:inotify
9 /proc/2880/fd/anon_inode:inotify
4 /proc/1375/fd/anon_inode:inotif...
How can I change the current URL?
...Use the URL hash. For example, you can go from example.com to example.com#foo without loading a new page. You can simply set window.location.hash to make this easy. Then, you should listen to the HTML5 hashchange event, which will be fired when the user presses the back button. This is not suppo...
What does the “at” (@) symbol do in Python?
...ons and class definitions
for more about decorators.
So, we see that
@foo
def bar():
pass
is semantically the same as:
def bar():
pass
bar = foo(bar)
They are not exactly the same because Python evaluates the foo expression (which could be a dotted lookup and a function call) befo...
Printing a variable memory address in swift
...ned(classInstance).toOpaque())
}
}
/* Testing */
class MyClass { let foo = 42 }
var classInstance = MyClass()
let classInstanceAddress = MemoryAddress(of: classInstance) // and not &classInstance
print(String(format: "%018p", classInstanceAddress.intValue))
print(classInstanceAddress)
str...
How to format strings in Java
...sing as well.
For example:
int someNumber = 42;
String someString = "foobar";
Object[] args = {new Long(someNumber), someString};
MessageFormat fmt = new MessageFormat("String is \"{1}\", number is {0}.");
System.out.println(fmt.format(args));
A nicer example takes advantage of the varargs a...
How to set a Javascript object values dynamically?
...
You can get the property the same way as you set it.
foo = {
bar: "value"
}
You set the value
foo["bar"] = "baz";
To get the value
foo["bar"]
will return "baz".
share
|
im...
What is the correct way to document a **kwargs parameter?
...might use me is
>>> print public_fn_with_googley_docstring(name='foo', state=None)
0
BTW, this always returns 0. **NEVER** use with :class:`MyPublicClass`.
"""
return 0
Though you asked about sphinx explicitly, I would also point to the Google Python Style Guide. Their docstring examp...
(Built-in) way in JavaScript to check if a string is a valid number
...10000') // false (This translates to Infinity, which is a number)
isNaN('foo') // true
isNaN('10px') // true
Of course, you can negate this if you need to. For example, to implement the IsNumeric example you gave:
function isNumeric(num){
return !isNaN(num)
}
To convert a string ...