Kotlin Split String using a given set of delimiters or Regular Expression – Splitting a string to parts by delimiters is useful when the string contains many (parametric) values separated by delimiters or if the string resembles a regular expression. In this tutorial we shall learn how to spli...
A string is a basic data type in a programming language. In Kotlin, theStringclass represents character strings. Kotlin string literals are implemented as instances of this class. Kotlin uses double quotes to create string literals. Kotlin has a rich API for working with strings. It contains pl...
To split string to lines in Kotlin programming, you may use String.lines() function. The function lines() : splits the char sequence to a list of lines delimited by any of the following character sequences: Carriage-Return Line-Feed, Line-Feed or Carriage-Return. Syntax – String.lines()...
AI代码解释 File("ChicagoCrimes.csv").useLines{lines->// The type of `lines` is Sequence<String>lines.drop(1)// Drop descriptions of the columns.mapNotNull{it.split(",").getOrNull(6)}// Find description.filter{"CANNABIS"init}.count().let{println(it)}// 318185 在我的电脑上,这需要...
<String>) { SpringApplication.run(Chapter11KotlinSpringbootApplication:class.java, *args) } 这里我们主要关注的@SpringBootApplication,它包括三个注解,简单说明如下表: 注解 功能说明 @SpringBootConfiguration包括@) 表示将该类作用springboot配置文件。 @EnableAutoConfiguration 表示Spring程序启动时...
val values = line.split(",") text.appendln("{") // walk through the elements of the CSV line for (i in 0 until values.count()) { // convert the element in the proper JSON string val element = getElement(values[i].trim()) ...
fun String.spaceToCamelCase(){ var camelTest = this.split(" ") .map { it.replaceFirst(it[0], it[0].toUpperCase()) } .joinToString("") println(camelTest) } 1. 2. 3. 4. 5. 6. 上面的方法用来将一个句子转换为驼峰字符串并打印出来。这种写法相当于为String类扩展了一个方法spaceToCamel...
Additionally, the kernel uses arguments that the environment points in theKOTLIN_JUPYTER_JAVA_OPTS_EXTRAvariable. The arguments are parsed using the Pythonshlex.split()function. Use Datalore To create a Kotlin notebook in Datalore, click onNew notebookand selectKotlinas kernel. ...
String content = matcher.group(1); String[] parts = content.split(", ");if(parts.length==2){ db_table = parts[0]+"."+parts[1]; }if(parts.length==1){ db_table = parts[0]; }if(parts.length>=3){ db_table = content; ...
// Thetypeof `lines` is Sequence<String> lines .drop(1) // Drop deions of the columns .mapNotNull { it.split(",").getOrNull(6) } // Find deion .filter {"CANNABIS"init } .count .let{ println(it) } // 318185 在我的电脑上,这需要8.3秒。为了比较这两种方法的效率,我又做了一个...