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Python 2022-03-21 08:45:23
python extract specific columns from pandas dataframe
# Basic syntax: new_dataframe = dataframe.filter(['col_name_1', 'col_name_2']) # Where the new_dataframe will only have the column names specified # Note, use df.filter(['names', ... ], axis=0] to select rows Add solution -
CSS 2022-03-19 18:00:12
how to saturate colors in css
/* syntax: The amount of the conversion, specified as a <number> or a <percentage>. A value under 100% desaturates the image, while a value over 100% super-saturates it. A value of 0% is completely unsaturated, while a value of 100% leaves th... Add solution -
Javascript 2022-03-19 17:25:26
sorting of categories and subcategories in js
function iterative(categories, parentCategory, level = 0) { return categories .filter((category) => parentCategory ? category.parent === parentCategory : !category.parent) .map(category => { category.level = level; return cat... Add solution -
Javascript 2022-03-19 17:15:22
advanced data manipulation javascript
var array = [“blue”, “green”, “green”, “black”, “orange”, “blue”, “green”, “red”];var uniqueArray = [];uniqueArray = array.filter((element, index, array)=>{... Add solution -
Java 2022-03-18 20:30:06
how to set username, roles, admin in jwt claims example coding in java
public String createToken(String username, List<Role> roles) { Claims claims = Jwts.claims().setSubject(username); claims.put("auth", roles.stream().map(s -> new SimpleGrantedAuthority(s.getAuthority())).filter(Objects::nonNull... Add solution -
PHP 2022-03-18 03:05:53
php filter_var boolean
$bool = filter_var("1", FILTER_VALIDATE_BOOLEAN); // true $bool = filter_var("true", FILTER_VALIDATE_BOOLEAN); // true $bool = filter_var("yes", FILTER_VALIDATE_BOOLEAN); // true $bool = filter_var("on", FILTER_VALI... Add solution -
Swift 2022-03-18 00:25:20
how to read music library from iphone programmatically in swift
// All let mediaItems = MPMediaQuery.songsQuery().items // Or you can filter on various property // Like the Genre for example here var query = MPMediaQuery.songsQuery() let predicateByGenre = MPMediaPropertyPredicate(value: "Rock", forProperty:... Add solution