LaughingVzr

@LaughingVzr·6 public vizzes

[JavaScript This的应用] #javascript #EMACScript

This example demonstrates a JavaScript technique for overriding the native `document.getElementById` method to control how DOM elements are accessed. It shows the result of calling the modified function to retrieve a `div` element with the ID `div1` and logging its `id` property to the console. The code wraps the original method using `Function.prototype.apply` to preserve the `document` context, then assigns the wrapper to a variable and invokes it. The implementation relies solely on vanilla JavaScript DOM APIs, with no external libraries.

Jul 11, 2018

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[Golang原生json包[]interface转[]string] #golang #json

This example demonstrates converting JSON array elements from Go’s native `[]interface{}` type into a `[]string` array by asserting the parameter type and iterating through each element. The code uses Go’s JSON package to parse the params, then employs a type switch to handle `string`, `float64`, and `int64` values, formatting numbers with `strconv.FormatFloat` and `strconv.FormatInt` before appending them to the result. The snippet highlights type assertion and conditional conversion logic for heterogeneous JSON data.

Jul 11, 2018

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[Golang 按行读取配置文件] #golang #file

This example demonstrates how to read a configuration file line by line in Go, returning the lines as a slice of strings. It shows the process of opening a file with `os.Open`, wrapping it in a `bufio.Reader`, and using `ReadLine` in a loop to capture each line until `io.EOF` is reached. The function `readTestFile` handles file opening errors gracefully and defers the file closing via `defer file.Close()`. The data source is a text file whose path is passed as an argument.

Jul 11, 2018

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[Golang实现自定义sort接口(根据结构值排序)] #golang #sort

This example demonstrates custom sorting of a Go structure by value, specifically ordering nodes by their count in descending order. It defines a `node` type with key and count fields, then implements the `sort.Interface` methods—`Len`, `Less`, and `Swap`—on a `nodeList` slice to enable native `sort` package functionality. The `SortPatten` function converts a `map[string]int` into a `nodeList`, which is then sorted using the custom comparator. The code shows how to adapt arbitrary map data into a sortable collection without external libraries, relying solely on Go’s standard `sort` package.

Jul 11, 2018

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[Java判断字符是否是汉字]汉字判断 #java #character util

This example demonstrates a Java utility for determining whether a character or string contains Chinese characters. The code defines a `CharacterUtils` class with two static methods: `isChinese(char)` checks a single character by comparing its Unicode value against the CJK Unified Ideographs block (0x4E00–0x9FA5), while `isChineseStr(String)` iterates through each character of a string using `toCharArray()` and returns `true` if any character qualifies. The logic relies on direct integer range comparisons on the primitive `char` type, with no external libraries or data sources involved. The implementation is straightforward and self-contained, suitable for text-processing tasks.

Jul 11, 2018

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CSS 将显示不完的多余字符用省略号代替兼容各主要浏览器 IE6+、FF、Chrom

This example demonstrates CSS techniques for truncating overflowing text with ellipses in both single-line and multi-line layouts. The single-line method applies the `text-overflow: ellipsis` property alongside vendor-prefixed versions (`-o-text-overflow`, `-moz-text-overflow`, `-webkit-text-overflow`) and requires `white-space: nowrap` and `overflow: hidden`. For multi-line text, the approach simulates ellipsis by positioning a child `<div>` containing "..." absolutely at the bottom-right corner over a relative-positioned container with `overflow: hidden`. The code uses only standard HTML and CSS, with no external libraries or data sources.

Feb 18, 2014