Overview

String formatting like Python's .format()

Obs:The result expected is the same as Python

Install

Node

1. Install:

   npm install python-format-js

   or

   yarn add python-format-js

2. Require:

   // Module and prototype
   const format = require("python-format-js");

   or

   // Only prototype
   require("python-format-js");

Tests

3. Test:

   npm test

   or

   yarn test

You Can Do

-  Basic formatting
-  Padding and aligning strings
-  Truncating long strings
-  Combining truncating and padding
-  Signed numbers
-  Named placeholders

See Documention in Python

Supported Parameter Values

• '<' - Left aligns the result (within the available space)
• '>' - Right aligns the result (within the available space)
• '^' - Center aligns the result (within the available space)
• '=' - Places the sign to the left most position
• '+' - Use a plus sign to indicate if the result is positive or negative
• '-' - Use a minus sign for negative values only
• ' ' - Use a leading space for positive numbers
• ',' - Use a comma as a thousand separator
• '_' - Use a underscore as a thousand separator
• 'b' - Binary format
• 'c' - Converts the value into the corresponding unicode character
• 'd' - Decimal format
• 'e' - Scientific format, with a lower case e
• 'E' - Scientific format, with an upper case E
• 'f' - Fix point number format
• 'F' - Fix point number format, upper case
• 'g' - General format
• 'G' - General format (using a upper case E for scientific notations)
• 'o' - Octal format
• 'x' - Hex format, lower case
• 'X' - Hex format, upper case
• 'n' - Number format
• '%' - Percentage format
• '#' - Makes the format include the 0b prefix in (Octal,Hex,Binary)

Examples

Obs:The result expected is the same as Python

• Please report any bug

More Examples

- Simples Change:

"{} {}".format("Jhon", "Mart");

("Jhon Mart");

- Advance Change Array:

"My name is {0} and i have {1} years old!".format(["Jônatas", 21]);

("My name is Jônatas and i have 21 years old!");

- Advance Change Object:

"Your name is {name} and you have {age} years old!".format({
  name: "Jônatas",
  age: 21,
});

("My name is Jônatas and i have 21 years old!");

- One Argument type Number:

"{} ".format(2);

("2 ");

- One Argument type Float:

 "{} ".format(3.14))

 ("3.14 ");

- One Argument type Boolean:

 "{} ".format(true))

 ("true ")

- Multiple type Argument:

"{} {} {}".format(2, 3.14, true);

("2 3.14 true");

- Overflow String Align Right:

"{:^3}".format("Gustavo");

("Gustavo");

- Overflow String Align Center:

"{:^3}".format("Gustavo");

("Gustavo");

- Align Left:

"{:<6}".format("oii");

("oii   ");

- Align Right:

"{:>6}".format("oii");

("   oii");

- Align Center Incomplete:

"{:^6}".format("oii");

(" oii  ");

- Align Center Complete:

"{:^7}".format("oii");

("  oii  ");

- Crop:

"{:.7}".format("Jonatas Martins");

("Jonatas");

- Size String:

"{:10}".format("test");

("test      ");

- Char Append Left:

"{:_<7}".format("Jhon");

("Jhon___");

- Char Append Right:

"{:_>7}".format("Jhon");

("___Jhon");

- Char Append Center Incomplete:

"{:_^7}".format("Jhon");

("_Jhon__");

- String and param left align:

"Olá {:<8}".format("Jhon");

("Olá Jhon    ");

- String and param right align:

"Olá {:>8}".format("Jhon");

("Olá     Jhon");

- String and param center align:

"Olá {:^8}".format("Jhon");

("Olá   Jhon  ");

- Float:

"{:f}; {:f}".format(3.14, -3.14);

("3.140000; -3.140000");

- Float Space:

"{: f}; {: f}".format(3.14, -3.14);

(" 3.140000; -3.140000");

- Float Align:

"{:<15f}; {: f}".format(3.14, -3.14);

("3.140000       ; -3.140000");

- Float Plus:

"{:+f}; {:+f}".format(3.14, -3.14);

("+3.140000; -3.140000");

- Float Less:

"{:-f}; {:-f}".format(3.14, -3.14);

("3.140000; -3.140000");

- Number Simple:

"{:n} é maior que {:n} ".format(3.14, 21);

("3.14 é maior que 21 ");

- Binary:

"{:b}".format(42);

("101010");

- Binary Align:

"{:>4b}".format(5);

(" 101");

- Binary Mask:

"{:#b}".format(42);

("0b101010");

- Octal:

"{:o}".format(42);

("52");

- Octal Mask:

"{:#o}".format(42);

("0o52");

- Octal Mask Sign:

"{:-o}".format(42);

("+52");

- Octal Mask Space:

"{: o}".format(42);

(" 52");

- Number Octal Positive:

"{:+#o}".format(4233);

("+0o10211");

- Number Octal Negative:

"{:-#o}".format(-4233);

("-0o10211");

- Hexadecimal:

"{:x}".format(42);

("2a");

- Hexadecimal Mask:

"{:#x}".format(42);

("0x2a");

- Hexadecimal Mask Upper Case:

"{:#X}".format(42);

("0X2A");

- Decimal Number:

"{:d}".format(42);

("42");

- Exp:

"{:e}".format(4233);

("4.233e+3");

- Exp Upper Case:

"{:E}".format(4233);

("4.233E+3");

- Exp Size Over:

"{:<15e}".format(4233);

("4.233e+3       ");

- Percent:

"{:%}".format(0.065);

("6.500000%");

- All data:

"{:g}".format("Hello World");

("Hello World");

- Align All:

"{:<5g}".format("T");

("T    ");

    - Thousands Separator:

```javascript
"{:,}".format(1234567890);

("1,234,567,890");

Help us

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