You can use PHP’s array_keys function to grab the keys, like so: foreach(array_keys($parameters) as $paramName) echo $paramName . “<br>”; Or, you can run through the array using a special foreach which allows you to separate the key and value for every element, like so: foreach($parameters as $paramName => $value) echo $paramName . “<br>”; Also, make … Read more
array_slice returns a slice of an array $sliced_array = array_slice($array, 0, 5) is the code you want in your case to return the first five elements
Using a foreach loop without a key: foreach($array as $item) { echo $item[‘filename’]; echo $item[‘filepath’]; // To know what’s in $item echo ‘<pre>’; var_dump($item); } Using a foreach loop with a key: foreach($array as $i => $item) { echo $array[$i][‘filename’]; echo $array[$i][‘filepath’]; // $array[$i] is same as $item } Using a for loop: for ($i … Read more
Promise.all accepts an Array of Promise objects. You’re getting an Array of undefined because you’re not returning any Promise in your map callback: function addText(queries) { return Promise.all(queries.map(function(query) { // Add `return` here or the `map` returns an Array of `undefined`. return models.queries .findById(query.queryId, { raw: true, attributes: [ “query” ] }) .then(function(queryFetched) { query.text … Read more
Just use array_merge or array_replace. array_merge works by starting with the array you give it (in the proper order) and overwriting/adding the keys with data from your actual array: $customer[‘address’] = ‘123 fake st’; $customer[‘name’] = ‘Tim’; $customer[‘dob’] = ’12/08/1986′; $customer[‘dontSortMe’] = ‘this value doesnt need to be sorted’; $properOrderedArray = array_merge(array_flip(array(‘name’, ‘dob’, ‘address’)), $customer); … Read more
for in loops over enumerable property names of an object. for of (new in ES6) does use an object-specific iterator and loops over the values generated by that. In your example, the array iterator does yield all the values in the array (ignoring non-index properties).
Plain javascript (ES2015), using Set const list = [{ x: 1, y: 2 }, { x: 3, y: 4 }, { x: 5, y: 6 }, { x: 1, y: 2 }]; const uniq = new Set(list.map(e => JSON.stringify(e))); const res = Array.from(uniq).map(e => JSON.parse(e)); document.write(JSON.stringify(res));
This function removes duplicate values from an array by returning a new one. function removeDuplicatesBy(keyFn, array) { var mySet = new Set(); return array.filter(function(x) { var key = keyFn(x), isNew = !mySet.has(key); if (isNew) mySet.add(key); return isNew; }); } var values = [{color: “red”}, {color: “blue”}, {color: “red”, number: 2}]; var withoutDuplicates = removeDuplicatesBy(x => … Read more
Say you call: void Foo(){ int[] a = new int[5]; } In C# there is no way to undefine the variable a. That means a will be defined in Foo even if you set a to null. However, at the end of Foo a will fall out of scope. That means no code can reference … Read more
You have three questions: 1. Which __xx__ method has numpy overridden/defined to handle fancy indexing? The indexing operator [] is overridable using __getitem__, __setitem__, and __delitem__. It can be fun to write a simple subclass that offers some introspection: >>> class VerboseList(list): … def __getitem__(self, key): … print(key) … return super().__getitem__(key) … Let’s make an … Read more