How can I check contain number in list flutter

numList = [for (var i = 0; i < 100; i ) i.toString().padLeft(2, "0")];

it is a list from 00 to 99 .

how to get all contain 0. eg : 00,01,10,02,20....

and how to get start with 1. eg : 10,11,12,13.....

thanks for your kindness.

CodePudding user response：

You could do something like this

List<string> containingZero = []
List<string> startingWithOne = []
for (var numberString in numList) {
    if (numberString[0] == "1") {
        startingWithOne.append(numberString)
    }
    if (numberString.contains("0")) {
        containingZero(numberString)
    }
}

First, you iterate over all strings in the list. And within that iteration, you can check the individual characters with methods such as contains() and access individual letters just like in any list

CodePudding user response：

void main(List<String> args) {
  var numList = [for (var i = 0; i < 100; i  ) 
                  i.toString().padLeft(2, "0")];
  
  var numOfZeros=[];
  var numOfOnes=[];

// loop to check every element
for(int i=0;i<numList.length;i  ){

// check if an element contains "0"

  if(numList[i].contains("0")){

    numOfZeros.add(numList[i]);
  }
  // check if an element contains "1" in its index
  if(numList[i][0].contains(RegExp("1"))){
    numOfOnes.add(numList[i]);

  }
}



print(numOfOnes);
//print(numList[91][1]);
//print(numOfZeros);
//   print("$numList");
//   print(numZero);
//   print(numList[10]);
}