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Javascript 2021-09-01 07:09:01
javascript double question mark
//Similar to || but only returns the right-hand operand if the left-hand is null or undefined 0 ?? "other" // 0 false ?? "other" // false null ?? "other" // "other" undefined ?? "other" // "other" Add solution -
Javascript 2021-09-01 00:34:01
object doesn't support this property or method find
//.find isnt supported in IE11, under here is a polyfill if (!Array.prototype.find) { Object.defineProperty(Array.prototype, 'find', { value: function(predicate) { // 1. Let O be ? ToObject(this value). if (this == null) { throw n... Add solution -
SQL 2021-08-29 14:18:02
Google BigQuery how to create machine learning model using SQL
-- standardSQL to build the model CREATE OR REPLACE MODEL `bqml_lab.sample_model` OPTIONS(model_type='logistic_reg') AS SELECT IF(totals.transactions IS NULL, 0, 1) AS label, IFNULL(device.operatingSystem, "") AS os, device.isMobile AS is_... Add solution -
TypeScript 2021-08-28 04:41:02
how to clear all products woocommerce keep category
-- Delete all WooCommerce products DELETE FROM wp_term_relationships WHERE object_id IN (SELECT ID FROM wp_posts WHERE post_type IN ('product','product_variation')); DELETE FROM wp_postmeta WHERE post_id IN (SELECT ID FROM wp_posts WHERE post_type IN ('pr... Add solution -
Javascript 2021-08-27 19:01:02
what means ?? in dart
// The ?? double question mark operator means "if null" String a = b ?? 'hello'; // This means a equals b, but if b is null then a equals 'hello'. It is like || in JavaScript b ??= 'hello'; // If b is null then set it equal to 'hello'. Otherwis... Add solution -
Java 2021-08-27 14:14:01
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
Null pointer try to say that the textview is null. That can happen beacause the findviewbyid is not matching with the right one on your xml. Be sure your id matches on your xml and java file Add solution
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