Sha256: 357df04e2da68c7aacb14d0a654faac17c2a2928c18ef81c74e70fb98bef21d6
Contents?: true
Size: 1.45 KB
Versions: 185
Compression:
Stored size: 1.45 KB
Contents
class List {
constructor(arr) {
this.values = arr || [];
}
append(otherList) {
for (const el of otherList.values) {
this.values.push(el);
}
return this;
}
concat(otherList) {
return this.append(otherList);
}
filter(operation) {
const filteredValues = [];
for (const el of this.values) {
if (operation(el)) {
filteredValues.push(el);
}
}
this.values = filteredValues;
return this;
}
length() {
let length = 0;
for (const el of this.values) {
length++;
}
return length;
}
map(operation) {
const mappedValues = [];
for (const el of this.values) {
mappedValues.push(operation(el));
}
this.values = mappedValues;
return this;
}
foldl(operation, initialValue) {
let acc = initialValue;
for (const el of this.values) {
acc = operation(acc, el);
}
return acc;
}
foldr(operation, initialValue) {
let acc = initialValue;
let index = this.length() - 1;
while (index >= 0) {
const el = this.values[index--];
acc = operation(acc, el);
}
return acc;
}
reverse() {
const numElements = this.length();
let finalIndex = numElements - 1;
for (let index = 0; index < numElements / 2; index++) {
const temp = this.values[index];
this.values[index] = this.values[finalIndex];
this.values[finalIndex--] = temp;
}
return this;
}
}
export default List;
Version data entries
185 entries across 185 versions & 1 rubygems