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Check if inputs are empty using jQuery
I have a form that I would like all fields to be filled in. If a field is clicked into and then not filled out, I would like to display a red background.
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Run an untrusted C program in a sandbox in Linux that prevents it from opening files, forking, etc.?
...interactively and in automatic mode. It has a ptrace()-based backend which allows its use on a Linux system without special privileges, as well as a far faster and more poweful backend which requires patching the kernel.
It is also possible to create a sandbox on Unix-like systems using chroot(1), ...
How can I get the iOS 7 default blue color programmatically?
... Yes, definitely not a good idea to hard-code any value that could potentially change. Especially when there is an API to query the actual value.
– Nicolas Miari
Oct 2 '15 at 2:49
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How to run two jQuery animations simultaneously?
...
I believe I found the solution in the jQuery documentation:
Animates all paragraph to a left style
of 50 and opacity of 1 (opaque,
visible), completing the animation
within 500 milliseconds. It also will
do it outside the queue, meaning it
will automatically start without
waiting f...
How to search for a string in text files?
... if 'blabla' in f.read():
print("true")
Another trick: you can alleviate the possible memory problems by using mmap.mmap() to create a "string-like" object that uses the underlying file (instead of reading the whole file in memory):
import mmap
with open('example.txt') as f:
s = mm...
What is the purpose of a self executing function in javascript?
...
It's all about variable scoping. Variables declared in the self executing function are, by default, only available to code within the self executing function. This allows code to be written without concern of how variables are nam...
How to avoid scientific notation for large numbers in JavaScript?
... and browsers based on it (Chrome, the new Edge [v79+], Brave) and Firefox all have support; Safari's support is underway.
Here's how you'd use BigInt for it: BigInt(n).toString()
Example:
const n = 13523563246234613317632;
console.log("toFixed (wrong): " + n.toFixed());
console.log("BigInt...
JavaScript inheritance: Object.create vs new
...e mentioned that Both examples seem to do the same thing, It's not true at all, because
Your first example
function SomeBaseClass(){...}
SomeBaseClass.prototype = {
doThis : function(){...},
doThat : function(){...}
}
function MyClass(){...}
MyClass.prototype = Object.create(SomeBaseClass....
var functionName = function() {} vs function functionName() {}
...);
function functionTwo() {
console.log("Hello!");
}
Historically, function declarations defined within blocks were handled inconsistently between browsers. Strict mode (introduced in ES5) resolved this by scoping function declarations to their enclosing block.
'use strict';
...
What does @hide mean in the Android source code?
...);
}
return PackageManager.PERMISSION_DENIED;
}
However, we can call it by reflection:
Class c;
c = Class.forName("android.app.ActivityManager");
Method m = c.getMethod("checkUidPermission", new Class[] {String.class, int.class});
Object o = m.invoke(null, new Object[]{"android.permissio...