renderRow(post) {
    var datePosted = new Date(post.publish_date).toString();
    return(
        <TouchableHighlight underlayColor='transparent' onPress={() => this.onPostPress(post)}>
            <View style={styles.row}>
                <Image style={styles.image} source={{uri: post.featured_image.replace(/^http:///i, 'https://')}} /> {/* Here's the error */}
                <View style={styles.info}>
                    <Text style={styles.title}>{post.title}</Text>
                    <Text style={styles.author}>Por {post.author_name}</Text>
                    <Text style={styles.date}>{datePosted.substr(4,11)}</Text>
                    <Text numberOfLines={3} style={styles.description}>{post.meta_description}..</Text>
                </View>
            </View>
        </TouchableHighlight>
    );
}

render() {
    return(
        <ListView
            dataSource={this.state.dataSource}
            renderRow={this.renderRow.bind(this)}
            style={styles.page}
         />
    );
}

if(post.featured_image != undefined) {
    var imageHttps = post.featured_image.replace(/^http:///i, 'https://');
}