A calculator inside Vim
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README.md

crunch

crunch makes calculations in Vim more accessible by providing an operator to evaluate mathematical expressions, loosening Vim's math syntax, and forcing integers into floating point numbers.

Usage

Mode Key Mapping Description
normal g={motion} Evaluate the text that {motion} moves over
normal g== Evaluate the current line
visual g= Evaluate the highlighted expressions
  • :[range]Crunch[!]

    • Evaluates the current visual selection or provided range and adds result to the end of the line(s) With the [!] crunch does not append the result but replaces the provided range or visual selection with the result this behavior can be reversed by setting g:crunch_result_type_append = 0
  • :Crunch

    • Provides a prompt in the command for you to enter your mathematical expression. The result is then available to be pasted from the default register.
  • :Crunch {expression}

    • Where {expression} is some mathematical expression to be evaluated. The result is then available to be pasted from the default register.

Requirements


Math With Looser Syntax

The following chart shows the looser math syntax provided with crunch, compared to the default math syntax.

Feature With crunch Without crunch
Implied Multiplication
cos(0)cos(0) = 1 cos(0)*cos(0) = 1.0
2sin(1) = 1.682942 2*sin(1) = 1.682942
sin(1)2 = 1.682942 sin(1)*2 = 1.682942
(23)(32) = 36 (23)(3*2) = 36
2(3*2) = 12 2*(3*2) = 12
Integer to Float Conversion
1/2 = 0.5 1.0/2.0 = 0.5
.25*4 = 1 0.25*4 = 1.0
Decimals w/o Leading Zeros
.5/2 = 0.25 0.5/2 = 0.25
.25*4 = 1 0.25*4 = 1.0
Removed Zeros In Result
0.25*4 = 1 0.25*4 = 1.0
pow(2,8) = 256 pow(2,8)= 256.0