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Why isn't sizeof for a struct equal to the sum of sizeof of each member?
... there is some order-guarantee in C++: "Nonstatic data members of a (non-union) class declared without an intervening access-specifier are allocated so that later members have higher addresses within a class object"
– jfs
Apr 10 '17 at 20:40
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Constructor overload in TypeScript
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I know this is an old question, but new in 1.4 is union types; use these for all function overloads (including constructors). Example:
class foo {
private _name: any;
constructor(name: string | number) {
this._name = name;
}
}
var f1 = new foo("bar");
va...
How does SSL really work?
...ing. Self-signed?!
Yes, at the end of the certificate chain (a.k.a. the "root"), there will be a certificate that uses it's own keypair to sign itself. This eliminates the infinite recursion problem, but it doesn't fix the authentication problem. Anybody can create a self-signed certificate that s...
How do I calculate square root in Python?
...valuate to 0.
And for the record, the preferred way to calculate a square root is this:
import math
math.sqrt(x)
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NPM global install “cannot find module”
...lem due to my npm installing into a location that's not on my NODE_PATH.
[root@uberneek ~]# which npm
/opt/bin/npm
[root@uberneek ~]# which node
/opt/bin/node
[root@uberneek ~]# echo $NODE_PATH
My NODE_PATH was empty, and running npm install --global --verbose promised-io showed that it was insta...
Where are Docker images stored on the host machine?
...t from the Mac Osx system. Try this command : docker run --rm -it -v /:/vm-root alpine:edge ls -l /vm-root nad after this : docker run --rm -it -v /:/vm-root alpine:edge ls -l /vm-root/var/lib/docker You are available to list the docker folder from the WM host
– user1842947
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The command rbenv install is missing
...g the command:
git clone https://github.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ruby-build
On Mac OS X you can install it through homebrew:
brew install ruby-build
On Debian (version >= 7) and Ubuntu (version >= 12.10) both rbenv and ruby-build can be installed using apt-get (or...
Conditionally start at different places in storyboard from AppDelegate
...l load the storyboard and set its initial view controller as your window's root view controller before it sends application:didFinishLaunchingWithOptions: to your AppDelegate.
I also assume that the initial view controller in your storyboard is the navigation controller, onto which you want to push...
Django CharField vs TextField
...nce among these three types", but AFAIK there are some differences in e.g. MySQL, so this is something to keep in mind.
A good rule of thumb is that you use CharField when you need to limit the maximum length, TextField otherwise.
This is not really Django-specific, also.
...
Disabling Chrome cache for website development
...ck (or hold left click) on the reload button at the top of the browser and select "Empty Cache and Hard Reload."
This will go beyond "Hard Reload" to empty the cache entirely, ensuring that anything downloaded via javascript or etc. will also avoid using the cache. You don't have to mess with set...