Easypt

Libraries

1. More on import

import is not only for importing *.ez sources, but also native Easypt libraries (like *.dll, *.so etc.). Easypt interpreter executable contain only core of Easypt features and its main features are being extensible and flexible. I present 3 simple libraries here:

• console
  • console.write
    • prints passed arguments
    • parameters: Basic type, any number of parameters
    • return value: console
  • console.writeLine
    • prints passed arguments and newline character
    • parameters
    • return value: console
  • console.read
    • read input from console until whitespace
    • no parameters
    • return value: new String
  • console.readLine
    • read input from console until newline
    • no parameters
    • return value: new String
  • console.scan
    • read input from console as data of type of passed arguments and store it in arguments
    • parameters: Int, Double, String or Boolean type, any number of parameters
    • return value: console
  • console.beep
    • beeps
    • no parameters
    • return value: console
• system
  • system.callShellCommand
    • call shell command
    • parameters: String
    • return value: system
  • system.getEnvironmentVariable
    • get environmental variable
    • parameters: String
    • return value: String
• time
  • time.secondsSinceEpoch
    • get time as seconds that have elapsed since 00:00:00 UTC, Thursday, 1 January 1970 (Read more, Wikipedia)
    • no parameters
    • return value: Int
  • time.sleep
    • blocks the execution of the current thread for provided milliseconds
    • parameters: Int
    • return value: time
  • Clock
    • construct new Clock
    • no parameters
    • return value: new Clock
  • Clock.getElapsedMilliseconds
    • get the time elapsed since the last restart or the construction of this Clock as milliseconds
    • no parameters:
    • return value: elapsed milliseconds as Int
  • Clock.restart
    • puts the time counter back to zero
    • no parameters
    • return value: this Clock

See in reference: console, system, time, Clock.

2. Finally some input

import("console");

console.writeLine("What's your name?");
auto name.=(console.read());
console.writeLine("Hello, ", name, "!");

3. Bigger example

This source will measure speed of Easypt’s console output functions:

import("time");
import("console");

auto test1;
auto test2;
auto test3;
auto test4;

auto clock.=(Clock());
for (auto i.=(0).<, 10000, i.++, {
    log(i);
});
test1.=(clock.getElapsedMilliseconds());

clock.restart();
for (auto i.=(0).<, 10000, i.++, {
    console.writeLine(i);
});
test2.=(clock.getElapsedMilliseconds());

clock.restart();
for (auto i.=(0).<, 10000, i.++, {
    console.write(i);
});
test3.=(clock.getElapsedMilliseconds());

clock.restart();
for (auto i.=(0).<, 10000, i.++, {
    console.fast.writeInt(i);
});
test4.=(clock.getElapsedMilliseconds());

console.write("\nlog: ", test1, " ms\n");
console.write("console.writeLine: ", test2, " ms\n");
console.write("console.write: ", test3, " ms\n");
console.write("console.fast.writeInt: ", test4, " ms\n");

Possible output:

[…]

log: 4923 ms
console.writeLine: 4243 ms
console.write: 3384 ms
console.fast.writeInt: 2569 ms

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