1. #1
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    Default 4.1.1 Cannot convert object to null and LINT

    4.1.1 Cannot convert object to null and LINT


    Please, check with lint: ext-all*.js

    I have one problem with older computers:

    ext-all-debug.js Line: 39330

    prepareItems : function(items, applyDefaults) {
    //alert(items,applyDefaults);
    if (Ext.isArray(items)) {
    items = items.slice();
    } else {
    items = [items];
    }



    var me = this,
    i = 0,
    len = items.length,
    item;


    for (; i < len; i++) {
    item = items[i];
    if (item === null) {
    Ext.Array.erase(items, i, 1);
    --i;
    --len;
    } else {
    if (applyDefaults) {
    item = this.applyDefaults(item);
    }

    item.isContained = me;
    items[i] = me.lookupComponent(item);


    delete item.isContained;
    delete items[i].isContained;
    }
    }


    return items;
    }

  2. #2
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    Default


    JSLint is a tool that will catch many things but IMO, Crockford takes things too far. There is nothing invalid about using == in many cases.
    Mitchell Simoens @SenchaMitch
    Sencha Inc, Senior Forum Manager
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  3. #3
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    Default


    for (; i < len; i++) {
    item = items[i];
    if (item == null) {
    Ext.Array.erase(items, i, 1);
    --i;
    --len;
    } else {
    if (applyDefaults) {
    item = this.applyDefaults(item);
    }


    // Tell the item we're in a container during construction
    item.isContained = me;
    items[i] = me.lookupComponent(item);
    // need to delete both in case item was a config
    delete item.isContained;
    delete items[i].isContained;
    Uncaught TypeError: Cannot convert null to object
    }
    }
    Some times i get this exception on big app. ext-all-dev.js:
    Uncaught TypeError: Cannot convert null to object ext-all-dev.js


    with no details.


    There is a Ext.List (extended) with cellclick listener with:


    Ext.suspendLayouts();
    Ext.create('Ext.ux.form.Panel',{ //extended form with initComponent .. this.callParent() ..)
    ...
    });
    Ext.resumeLayouts(true);


    This exception throwing 1 time in few days (60 - 150 clicks);

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