I have data as such:
[['Account 1', 122.00], ['Account 2', 342.33], ['Account 3', 103.32]]
I wish to be able to check to see if a string exists in any of the first indexes of the arrays and find it's index in the overall array. In other words:
index = find(arr, 'Account 2') // This would return 1
Does JS already have something internal that can do this?
In ES6 there will be a findIndex method which will do just what you want here. You'll probably need to shim it, though.
var arr = [['Account 1', 122.00], ['Account 2', 342.33], ['Account 3', 103.32]]
var index = arr.findIndex(function(item) { return item[0] == 'Account 2'; }) // 1
Not sure if there's something built in, but you could always run a simple loop
var index;
for(var i = 0; i < yourArray.length; i++)
if(yourArray[i][0] == 'Account 2')
{
index = i;
break;
}
This will make the index variable the index that you're looking for. You can make this a function in your own code to avoid repeating code.
int is no javascript?
This might suit your needs:
var arr = [['Account 1', 122.00], ['Account 2', 342.33], ['Account 3', 103.32]];
function find( data, term ){
ret = null;
data.forEach(function(item, index){
if (item[0] === term)
ret = index;
});
return ret;
};
fiddle: http://jsfiddle.net/eguj3d5e/
Here is how to do it using open source project jinqJs
See Fiddle Example
var myarr = [['Account 1', 122.00], ['Account 2', 342.33], ['Account 3', 103.32]];
var result = jinqJs().from(myarr).where(function(row){return row[0] === 'Account 2'}).select();
Works like this...
var arr = [['Account 1', 122.00], ['Account 2', 342.33], ['Account 3', 103.32]];
var find = function(array, string) {
var ret;
array.forEach(function(arr, index) {
if(arr[0] === string){
ret = index;
}
});
return ret;
}
find(arr, 'Account 2');
find function doesn't return anything.
index = indexOf(arr, 'Account 2')
