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✨ Add utility functions and snippets to javascript.json #36

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130 changes: 129 additions & 1 deletion public/data/javascript.json
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Original file line number Diff line number Diff line change
Expand Up @@ -80,6 +80,106 @@
],
"tags": ["javascript", "string", "reverse", "utility"],
"author": "dostonnabotov"
},
{
"title": "Truncate Text",
"description": "Truncates the text to a maximum length and appends '...' if the text exceeds the maximum length.",
"code": [
"const truncateText = (text = '', maxLength = 50) => {",
" return `${text.slice(0, maxLength)}${text.length >= maxLength ? '...' : ''}`;",
"};",
"",
"// Usage:",
"const title = \"Hello, World! This is a Test.\";",
"console.log(truncateText(title)); // Output: 'Hello, World! This is a Test.'",
"console.log(truncateText(title, 10)); // Output: 'Hello, Wor...'"
],
"tags": ["javascript", "string", "truncate", "utility", "text"],
"author": "realvishalrana"
},
{
"title": "Data with Prefix",
"description": "Adds a prefix and postfix to data, with a fallback value.",
"code": [
"const dataWithPrefix = (data, fallback = '-', prefix = '', postfix = '') => {",
" return data ? `${prefix}${data}${postfix}` : fallback;",
"};",
"",
"// Usage:",
"console.log(dataWithPrefix('123', '-', '(', ')')); // Output: '(123)'",
"console.log(dataWithPrefix('', '-', '(', ')')); // Output: '-'",
"console.log(dataWithPrefix('Hello', 'N/A', 'Mr. ', '')); // Output: 'Mr. Hello'",
"console.log(dataWithPrefix(null, 'N/A', 'Mr. ', '')); // Output: 'N/A'"
],
"tags": ["javascript", "data", "utility"],
"author": "realvishalrana"
}
]
},
{
"categoryName": "Object Manipulation",
"snippets": [
{
"title": "Filter Object",
"description": "Filter out entries in an object where the value is falsy, including empty strings, empty objects, null, and undefined.",
"code": [
"export const filterObject = (object = {}) =>",
" Object.fromEntries(",
" Object.entries(object)",
" .filter(([key, value]) => value !== null && value !== undefined && value !== '' && (typeof value !== 'object' || Object.keys(value).length > 0))",
" );",
"",
"// Usage:",
"const obj1 = { a: 1, b: null, c: undefined, d: 4, e: '', f: {} };",
"console.log(filterObject(obj1)); // Output: { a: 1, d: 4 }",
"",
"const obj2 = { x: 0, y: false, z: 'Hello', w: [] };",
"console.log(filterObject(obj2)); // Output: { z: 'Hello' }",
"",
"const obj3 = { name: 'John', age: null, address: { city: 'New York' }, phone: '' };",
"console.log(filterObject(obj3)); // Output: { name: 'John', address: { city: 'New York' } }",
"",
"const obj4 = { a: 0, b: '', c: false, d: {}, e: 'Valid' };",
"console.log(filterObject(obj4)); // Output: { e: 'Valid' }"
],
"tags": ["javascript", "object", "filter", "utility"],
"author": "realvishalrana"
},
{
"title": "Get Nested Value",
"description": "Retrieves the value at a given path in a nested object.",
"code": [
"const getNestedValue = (obj, path) => {",
" const keys = path.split('.');",
" return keys.reduce((currentObject, key) => {",
" return currentObject && typeof currentObject === 'object' ? currentObject[key] : undefined;",
" }, obj);",
"};",
"",
"// Usage:",
"const obj = { a: { b: { c: 42 } } };",
"console.log(getNestedValue(obj, 'a.b.c')); // Output: 42"
],
"tags": ["javascript", "object", "nested", "utility"],
"author": "realvishalrana"
},
{
"title": "Unique By Key",
"description": "Filters an array of objects to only include unique objects by a specified key.",
"code": [
"const uniqueByKey = (key, arr) =>",
" arr.filter((obj, index, self) => index === self.findIndex((t) => t?.[key] === obj?.[key]));",
"",
"// Usage:",
"const arr = [",
" { id: 1, name: 'John' },",
" { id: 2, name: 'Jane' },",
" { id: 1, name: 'John' }",
"];",
"console.log(uniqueByKey('id', arr)); // Output: [{ id: 1, name: 'John' }, { id: 2, name: 'Jane' }]"
],
"tags": ["javascript", "array", "unique", "utility"],
"author": "realvishalrana"
}
]
},
Expand Down Expand Up @@ -313,5 +413,33 @@
"author": "dostonnabotov"
}
]
}
},
{
"categoryName": "Number Formatting",
"snippets": [
{
"title": "Number Formatter",
"description": "Formats a number with suffixes (K, M, B, etc.).",
"code": [
"const nFormatter = (num) => {",
" if (!num) return;",
" num = parseFloat(num.toString().replace(/[^0-9.]/g, ''));",
" const suffixes = ['', 'K', 'M', 'B', 'T', 'P', 'E'];",
" let index = 0;",
" while (num >= 1000 && index < suffixes.length - 1) {",
" num /= 1000;",
" index++;",
" }",
" return num.toFixed(2).replace(/\\.0+$|(\\.[0-9]*[1-9])0+$/, '1ドル') + suffixes[index];",
"};",
"",
"// Usage:",
"console.log(nFormatter(1234567)); // Output: '1.23M'"
],
"tags": ["javascript", "number", "format", "utility"],
"author": "realvishalrana"
}
]
}

]

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