USE_CONCAT提示强迫优化器扩展查询中的每一个OR谓词为独立的查询块. 最后合并所有查询块的结果,返回结果集给用户。 当使用多个in-lists查询时,Oracle可能选择把单个查询扩展为多个查询块。 使用USE_CONCAT提示示例: 1.使用scott用户及标准表进行测试 代码语言:javascript 代码运行次数:0 $ sqlplus scott/tigerSQL*Plus...
Understanding and employing `call()`, `apply()`, and `bind()` empower developers to wield JavaScript functions effectively, ensuring accurate context management and streamlined argument passing in div
Objectsin JavaScript are collections ofkey/valuepairs. The values can consist ofpropertiesandmethods, and may contain all other JavaScript data types, such as strings, numbers, and Booleans. All objects in JavaScript descend from the parentObjectconstructor.Objecthas many useful built-in methods we ...
JavaScript built-in: Array: concat Global usage 96.73% + 0% = 96.73% IE ✅ 6 - 10: Supported ✅ 11: Supported Edge ✅ 12 - 134: Supported ✅ 135: Supported Firefox ✅ 2 - 136: Supported ✅ 137: Supported ✅ 138 - 140: Supported Chrome ✅ 4 - 134: Supported ✅ ...
JavaScript built-in: Symbol: isConcatSpreadable Global usage 96.08% + 0% = 96.08% IE ❌ 6 - 10: Not supported ❌ 11: Not supported Edge ❌ 12 - 14: Not supported ✅ 15 - 134: Supported ✅ 135: Supported Firefox ❌ 2 - 47: Not supported ✅ 48 - 136: Supported ✅ ...
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elements propsForElement[key] = computedProps[key]; } } } if (props.style && attrs.style !== props.style) { propsForElement.style = _extends({}, props.style, {}, attrs.style); } propsForElement.className = Array.prototype.concat(foldedComponentIds, styledComponentId, generatedClassName ...
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const flowers = [['🍀'], ['🌷'], ['🌹'], ['🌻', '🌺']] const flattened = flowers.reduce((accumulator, item) => { return accumulator.concat(item) }, []) console.log(flattened) // [ '🍀', '🌷', '🌹', '🌻', '🌺' ] ...