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March 1, 2019 17:41
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Some handy functions I use quite a lot but that does not deserve a proper repo
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| /** | |
| * Because sometime we want to use the constructor of a typed array | |
| * from a string such as 'uint8' or 'float32' | |
| */ | |
| const TYPED_ARRAY_LUT = { | |
| int8: Int8Array, | |
| int16: Int16Array, | |
| int32: Int32Array, | |
| uint8: Uint8Array, | |
| uint16: Uint16Array, | |
| uint32: Uint32Array, | |
| float32: Float32Array, | |
| float64: Float64Array | |
| } | |
| /** | |
| * Deal with option object we pass in argument of function. | |
| * Allows the return of a default value if the `optionName` is not available in | |
| * the `optionObj` | |
| * @example | |
| * let myVal = getOption(options, 'someOptionName', 10) | |
| * @param {Object} optionObj - the object that contain the options | |
| * @param {String} optionName - the name of the option desired, attribute of `optionObj` | |
| * @param {any} optionDefaultValue - default values to be returned in case `optionName` is not an attribute of `optionObj` | |
| */ | |
| function getOption(optionObj, optionName, optionDefaultValue) { | |
| return (optionObj && optionName in optionObj) ? optionObj[optionName] : optionDefaultValue | |
| } | |
| /** | |
| * Use a custom template with custom values to create a custom string | |
| * @example | |
| * let result = sprintf('hello, my name is ${firstname} ${lastname}.', {firstname: 'Johnny', lastname: 'Bravo'}) | |
| * @param {string} template - the string template | |
| * @param {Object} data - key value pairs | |
| * @return {string} the formated string | |
| */ | |
| function sprintf(template, data){ | |
| let keys = Object.keys(data) | |
| let values = keys.map(k => data[k]) | |
| return new Function(...keys, `return \`${template}\`;`)(...values) | |
| } |
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