APIs are defined as a set of routines, protocols, and tools for building software applications. They allow two software programs to communicate with each other and define the proper way for a developer to request services from a program.

1. @the_dead_poetic
fb.com/pupprogrammingguild
github.com/awkwardusername
markjayson.fuentes@pup.edu.ph

2. APIs

3.  a set of routines, protocols, and tools for building
software applications [wikipedia]
 code that allows two software programs to communicate
with each other [techtarget]
 defines the proper way for a developer to request
services from that program [computer world]
APIs are…

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http://ref.x86asm.net/coder32.html

6. /* Setup cube vertex data. */
v[0][0] = v[1][0] = v[2][0] = v[3][0] = -1;
v[4][0] = v[5][0] = v[6][0] = v[7][0] = 1;
v[0][1] = v[1][1] = v[4][1] = v[5][1] = -1;
v[2][1] = v[3][1] = v[6][1] = v[7][1] = 1;
v[0][2] = v[3][2] = v[4][2] = v[7][2] = 1;
v[1][2] = v[2][2] = v[5][2] = v[6][2] = -1;
/* Enable a single OpenGL light. */
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glEnable(GL_LIGHT0);
glEnable(GL_LIGHTING);
/* Use depth buffering for hidden surface elimination. */
glEnable(GL_DEPTH_TEST);
/* Setup the view of the cube. */
glMatrixMode(GL_PROJECTION);
gluPerspective( /* field of view in degree */ 40.0,
/* aspect ratio */ 1.0,
/* Z near */ 1.0, /* Z far */ 10.0);
glMatrixMode(GL_MODELVIEW);
gluLookAt(0.0, 0.0, 5.0, /* eye is at (0,0,5) */
0.0, 0.0, 0.0, /* center is at (0,0,0) */
0.0, 1.0, 0.); /* up is in positive Y direction */

7. #include <windows.h>
const char g_szClassName[] = "myWindowClass";
#define IDC_MAIN_EDIT 101
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CREATE:
{
HFONT hfDefault;
HWND hEdit;
hEdit = CreateWindowEx(WS_EX_CLIENTEDGE, "EDIT", "",
WS_CHILD | WS_VISIBLE | WS_VSCROLL |
WS_HSCROLL | ES_MULTILINE | ES_AUTOVSCROLL | ES_AUTOHSCROLL,
0, 0, 100, 100, hwnd,
(HMENU)IDC_MAIN_EDIT, GetModuleHandle(NULL), NULL);
if(hEdit == NULL)
MessageBox(hwnd, "Could not create edit
box.", "Error", MB_OK | MB_ICONERROR);
hfDefault = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
SendMessage(hEdit, WM_SETFONT, (WPARAM)hfDefault,
MAKELPARAM(FALSE, 0));
}
break;

9. POST https://api.stripe.com/v1/charges
curl https://api.stripe.com/v1/charges
-u sk_test_BQokikJOvBiI2HlWgH4olfQ2:
-d amount=400
-d currency=usd
-d source=tok_15doRS2eZvKYlo2C2ENn4JQh
-d description="Charge for test@example.com"
{
"id": "ch_15e7rU2eZvKYlo2CxWE8afA9",
"object": "charge",
"created": 1425834404,
"livemode": false,
"paid": true,
"status": "succeeded",
"amount": 4996,
"currency": "usd",
"refunded": false,
"source": {
"id": "card_15e7rT2eZvKYlo2CXYAxysRN",
"object": "card",
"last4": "4242",
"brand": "Visa",
"funding": "credit",
"exp_month": 12,
"exp_year": 2018,
"fingerprint": "Xt5EWLLDS7FJjR1c",
"country": "US",

12. Linux
Android
Windows
Aliens

13. Intercommunication

14. a software architecture style consisting
of guidelines and best practices for
creating scalable web services.

15. Client–server
Stateless
Cacheable
Layered system

16.  Paypal/ Stripe (Billing)
 OpenStreetMaps [nomatim] (Geospatial
services)
 data.worldbank.org (everything)

17. Let’s do this

18.  Create an app that will record the
number of clicks a user makes.
 The client app should be able to record
from mobile devices, and web.
 We should be able to see how many
clicks have been pressed.

19. Client

21. POST http://counter.dev/count
GET http://counter.dev/count