#for-loop

[Tips] Something interesting about foreach() in TypeScript

This is just a note for myself. There are several ways to visit every element in a list. The most known way is for-loop. There are two different kinds of for-loop. One is foreach loop. Another one is traditional for-loop. Let’s check some examples.

foreach()

const array1 = ['a', 'b', 'c']; array1.forEach(item => { console.log(element); });

(more…)

for(i++; someCondition; i++) {...}

Answer: For Loop counting from 1 to n in a windows bat script #answer #solution #computers

For Loop counting from 1 to n in a windows bat script

I need to run a windows command n times within a bat script file. I know how to do this in various programming languages but cannot manage to get it right on the windows command line :-(

I would expect something like either

for(int i = 0; i < 100; i++) { // do something }

or even this (though not entirely seriously)

1.upto(100, { // do…

Answer: For Loop counting from 1 to n in a windows bat script #dev #development #solution

For Loop counting from 1 to n in a windows bat script

I need to run a windows command n times within a bat script file. I know how to do this in various programming languages but cannot manage to get it right on the windows command line :-(

I would expect something like either

for(int i = 0; i < 100; i++) { // do something }

or even this (though not entirely seriously)

1.upto(100, { // do…

Resolved: Is it possible to implement a Python for range loop without an iterator variable? #programming #answer #it

Is it possible to implement a Python for range loop without an iterator variable?

Is is possible to do this;

for i in range(some_number): #do something

without the i? If you just want to do something x amount of times and don’t need the iterator.

Answer [by Unknown]: Is it possible to implement a Python for range loop without an iterator variable?

Off the top of my head, no.

I think the best…

Solution: What do two left angle brackets mean? #fix #computers #it

What do two left angle brackets mean?

I saw a loop which I’ve never seen before:

for (int i = 0; i < (1 << list.Count); i++)

I can’t understand what (1 << list.Count) means, maybe someone could explain me this?

Original post

How to: Avoiding if statement inside a for loop?

Avoiding if statement inside a for loop?

I have a class called Writer that has a function writeVector like so:

void Drawer::writeVector(vector<T> vec, bool index=true) { for (unsigned int i = 0; i < vec.size(); i++) { if (index) { cout << i << "\t"; } cout << vec[i] << "\n"; } }

I’m trying not to have a duplicate code, while still worrying about the performance. In the function, I’m doing the i…