javascript - Filter on features in a vector layer

What I try to achieve is quite simple. I want to filter my vector layer by a query in the features. What I found out is that vector layer doesn't have updateParams() where I could do something like:

'layerDefs': featureName1+operatorName1+checkValue1 

So is there an other way to achieve this? Cause now I`m kinda clueless on how to filter a vector layer. Every way is welcome, the vector is already made so it's not a new vector layer.

I`m working with OpenLayers3 and ArcGIS featureservice.

I`m also not sure how to redraw the vector after it's filtered yet. All of my vectors are saved in an array.

I tried everything but sadly i couldn't get it to work. this is what i tried in the end. Last try is underneath with help of the suggestion from @Alexis_A

Okay after some more testing i found the problem, for some reason it gives the name of my variable and not the value that contains my variable. So in other words this bit of code:

var fn = featureName1;
console.log(fn);
var filtered = features.filter(function(feature) {
    console.log(feature);

    console.log(feature.values_.fn.value);
    return feature.values_.featureName1 == 2;
});

will littarly give this as console log:

categorie_melding

Object { pendingRemovals_: Object, dispatching_: Object, listeners_: Object, revision_: 2, ol_uid: 90, values_: Object, id_: 158816, geometryName_: "geometry", style_: null, styleFunction_: undefined, 2 meer… }

TypeError: feature.values_.fn is undefined[Meer info]

So at first it knows what the variable should be, but when i`m in the filter function it's just clueless. Anyone any idea on how to fix this?

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And why is filtering in OpenLayers3 so hard i just can't understand that they dont have an easier way to do it.