3. If true … else Shorthand This is a great code saver for when you want to do something if the test is true, else do something else by using the ternary operator. Longhand: let big;if (x > 10) { big = true;}else { big = false;} Shorthand: let big = x > 10 ? true : ...
使用属性简写,结合解构,我们实际上可以缩短我们的代码: functionupdateSomething(data={}){// 从data对象中解构出常量,而且重新命名veryLongPropertyconst{target,veryLongProperty:property}=data;let{willChange}=data;if(willChange==='unwantedValue'){willChange='wayBetter';}// Do more.useDataSomewhereElse({...
This is the shorthand for it: constfoo=true;letbar;if(foo){bar="heads";}else{bar="tails";}console.log(bar); JavaScript As we can see, we simplified our code by replacing the if-else statements with a ternary expression. We also avoided usingletwhich is better since we won’t have ...
let greetings; if (age < 18) { greetings = 'You are not old enough'; } else { greetings = 'You are young!'; } // Shorthand const greetings = age < 18 ? 'You are not old enough' : 'You are young!'; 21- Short-circuit assessment shorthand When assigning a variable value to an...
Object property shorthandWhen assigning a variable to an object property, if the variable name is equal to the property name, you can do the following:const x = 10; const myObj = { x }; console.log(myObj.x) // 10ExplanationUsually (pre-ES2015) when you declare a new object literal...
A pure function is a function that always returns the same result, if the same arguments are passed. The sum function always returns the same result. If we pass 1 and 2, it will always return 3 without side effects. If we pass 5 and 10, it will always return 15, and so on. This...
MFPKEY_ASFMediaSource_IterativeSeekIfNoIndex property (Windows) IPropertyStore::GetValue method (Windows) System.Communication.FollowupIconIndex (Windows) SetInterfaceReceiveType callback function (Windows) ILogicalSensorManager::Connect method (Windows) DWordPtrToLong function (Windows) DWordToUInt function...
8.2 If the function body consists of a single statement returning an expression without side effects, omit the braces and use the implicit return. Otherwise, keep the braces and use a return statement. eslint: arrow-parens, arrow-body-style jscs: disallowParenthesesAroundArrowParam, require...
function getKey() { return 'some key'; } let obj = { // Prototypes can be set this way __proto__: prototypeObject, // key === value, shorthand for someObject: someObject someObject, // Methods can now be defined this way method() { return 3; }, // Dynamic values for keys ...
// shorthand S = sax.STATE function emit (parser, event, data) { parser[event] && parser[event](data) } function emitNode (parser, nodeType, data) { if (parser.textNode) closeText(parser) emit(parser, nodeType, data) } function closeText (parser) { parser.textNode = textopts(parser...