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October 8, 2018 05:52
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| const foo = { name: "shyam", age: "10", code: false }; | |
| const coo = { name: "ram", age: "10", code: true }; | |
| const doo = { name: "kaam", age: "10", code: false }; | |
| //show variable name also | |
| console.log({ foo, coo, doo }); | |
| // css | |
| console.log("%c Test", "color:orange;font-weight:900;"); | |
| // TABLE | |
| console.table([foo, coo, doo]); | |
| // time trace | |
| console.time("looper"); | |
| let i = 0; | |
| while (i < 1000000) { | |
| i++; | |
| } | |
| console.timeEnd("looper"); | |
| // Stack trace log. | |
| const test = () => console.trace("Look at me now!"); | |
| test(); | |
| test(); | |
| test(); | |
| // string concatenation | |
| function boyAge(str, age) { | |
| const ageStr = age > 5 ? "old" : "young"; | |
| return `${str[0]}${ageStr} at ${age} years`; | |
| } | |
| const beta = boyAge`This boy's age is ${4}`; | |
| console.log(beta); | |
| // spread syntax | |
| const pikachu = { name: "Pikachu" }; | |
| const stats = { height: "50cm", weight: "10kg", alpha: false }; | |
| // want to merge pikachu & stats | |
| const newPikachu = Object.assign(pikachu, stats); | |
| // OR better | |
| const newPikachu1 = { ...pikachu, ...stats }; | |
| console.log({ newPikachu, newPikachu1 }); | |
| // spread works same for arrays | |
| // best looping techniques | |
| // reduce, filter, map | |
| // Promises | |
| // instead of chaining .then() use async & await |
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