feat: add new funciton

Author: Simon-He95

src/index.ts

@@ -139,3 +139,4 @@ export { mapTransform, mapTransformBack } from './mapTransform'
 export { generateKeyObject } from './generateKeyObject'
 export { arrayToExcel } from './arrayToExcel'
 export { getImageData } from './getImageData'
+export { removeRoundSpace } from './removeRoundSpace'

src/removeRoundSpace.ts

@@ -0,0 +1,65 @@
+export function removeRoundSpace(data: number[][]) {
+  let x = 0
+  const y: Record<string, number> = {}
+  const col = data[0].length
+  const row = data.length
+  const spliceRows = []
+  const spliceCols = []
+  for (let i = 0; i < row; i++) {
+    for (let j = 0; j < col; j++) {
+      if (data[i][j] === 0)
+        x++
+      if (data[i][j] === 0) {
+        if (!y[j])
+          y[j] = 0
+        y[j]++
+      }
+      if ((i === row - 1) && y[j] === row)
+        spliceCols.push(j)
+      if (j === col - 1 && x === col)
+        spliceRows.push(i)
+      if (j === col - 1)
+        x = 0
+    }
+  }
+  let start = 0
+  for (let i = 0; i < spliceRows.length; i++) {
+    const cur = spliceRows[i]
+    if (cur === start)
+      start++
+    else
+      break
+  }
+  let end = spliceRows[spliceRows.length - 1]
+  for (let i = spliceRows.length; i > start; i--) {
+    const cur = spliceRows[i - 1]
+    if (cur === end)
+      end--
+    else
+      break
+  }
+  if (end > start)
+    data.splice(end, spliceRows[spliceRows.length - 1])
+  data.splice(0, start)
+  start = 0
+  for (let i = 0; i < spliceCols.length; i++) {
+    const cur = spliceCols[i]
+    if (cur === start)
+      start++
+    else break
+  }
+  end = spliceCols[spliceCols.length - 1]
+  for (let i = spliceCols.length; i > start; i--) {
+    const cur = spliceCols[i - 1]
+    if (cur === end)
+      end--
+    else break
+  }
+  for (let i = 0; i < data.length; i++) {
+    if (end > start)
+      data[i].splice(end, spliceCols[spliceCols.length - 1])
+    data[i].splice(0, start)
+  }
+  return data
+}
+