msb-public
/
tech-interview-handbook
mirror of https://github.com/yangshun/tech-interview-handbook
2
1
Code Issues Projects Releases Wiki Activity

contents: update default Python sort to Powersort (#721)

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Signed-off-by: SoulSniper1212 <warush23@gmail.com>
main
Arush Wadhawan 3 weeks ago committed by GitHub
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commit cbcb5a010e
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9 changed files with 420 additions and 414 deletions
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2
apps/portal/src/components/global/GoogleAnalytics.tsx
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@ -71,7 +71,7 @@ export default function GoogleAnalytics({ children }: Props) {
return () => {
router.events.off('routeChangeComplete', handleRouteChange);
};
}, [router.events,]);
}, [router.events]);
return (
<GoogleAnalyticsContext.Provider value={{ event }}>

2
apps/portal/src/components/offers/offersSubmission/OffersSubmissionAnalysis.tsx
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@ -33,4 +33,4 @@ export default function OffersSubmissionAnalysis({
)}
</div>
);
}
}

754
apps/portal/src/server/router/offers/offers-admin-router.ts
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@ -43,449 +43,451 @@ const getYoeRange = (yoeCategory: number | null | undefined) => {
: null; // Internship
};
export const offerAdminRouter = createProtectedRouter().query('list', {
input: z.object({
companyId: z.string().nullish(),
countryId: z.string().nullish(),
currency: z.string().nullish(),
dateEnd: z.date().nullish(),
dateStart: z.date().nullish(),
limit: z.number().positive(),
offset: z.number().nonnegative(),
salaryMax: z.number().nonnegative().nullish(),
salaryMin: z.number().nonnegative().nullish(),
sortBy: z
.string()
.regex(createValidationRegex(Object.keys(sortingKeysMap), '[+-]{1}'))
.nullish(),
title: z.string().nullish(),
yoeCategory: z.number().min(0).max(3).nullish(),
yoeMax: z.number().max(100).nullish(),
yoeMin: z.number().min(0).nullish(),
}),
async resolve({ ctx, input }) {
const userId = ctx.session.user.id;
const adminAccount = await ctx.prisma.offersAdmin.findFirst({
where: {
userId
}
})
if (!adminAccount) {
throw new TRPCError({
code: 'UNAUTHORIZED',
message: 'Not an admin.',
export const offerAdminRouter = createProtectedRouter()
.query('list', {
input: z.object({
companyId: z.string().nullish(),
countryId: z.string().nullish(),
currency: z.string().nullish(),
dateEnd: z.date().nullish(),
dateStart: z.date().nullish(),
limit: z.number().positive(),
offset: z.number().nonnegative(),
salaryMax: z.number().nonnegative().nullish(),
salaryMin: z.number().nonnegative().nullish(),
sortBy: z
.string()
.regex(createValidationRegex(Object.keys(sortingKeysMap), '[+-]{1}'))
.nullish(),
title: z.string().nullish(),
yoeCategory: z.number().min(0).max(3).nullish(),
yoeMax: z.number().max(100).nullish(),
yoeMin: z.number().min(0).nullish(),
}),
async resolve({ ctx, input }) {
const userId = ctx.session.user.id;
const adminAccount = await ctx.prisma.offersAdmin.findFirst({
where: {
userId,
},
});
}
const yoeRange = getYoeRange(input.yoeCategory);
const yoeMin = input.yoeMin != null ? input.yoeMin : yoeRange?.minYoe;
const yoeMax = input.yoeMax != null ? input.yoeMax : yoeRange?.maxYoe;
if (!adminAccount) {
throw new TRPCError({
code: 'UNAUTHORIZED',
message: 'Not an admin.',
});
}
if (!input.sortBy) {
input.sortBy = '-' + sortingKeysMap.monthYearReceived;
}
const yoeRange = getYoeRange(input.yoeCategory);
const yoeMin = input.yoeMin != null ? input.yoeMin : yoeRange?.minYoe;
const yoeMax = input.yoeMax != null ? input.yoeMax : yoeRange?.maxYoe;
const order = getOrder(input.sortBy.charAt(0));
const sortingKey = input.sortBy.substring(1);
if (!input.sortBy) {
input.sortBy = '-' + sortingKeysMap.monthYearReceived;
}
const order = getOrder(input.sortBy.charAt(0));
const sortingKey = input.sortBy.substring(1);
const data = !yoeRange
? await ctx.prisma.offersOffer.findMany({
// Internship
include: {
company: true,
location: {
include: {
state: {
include: {
country: true,
const data = !yoeRange
? await ctx.prisma.offersOffer.findMany({
// Internship
include: {
company: true,
location: {
include: {
state: {
include: {
country: true,
},
},
},
},
},
offersFullTime: {
include: {
baseSalary: true,
bonus: true,
stocks: true,
totalCompensation: true,
offersFullTime: {
include: {
baseSalary: true,
bonus: true,
stocks: true,
totalCompensation: true,
},
},
},
offersIntern: {
include: {
monthlySalary: true,
offersIntern: {
include: {
monthlySalary: true,
},
},
},
profile: {
include: {
background: true,
offers: true,
profile: {
include: {
background: true,
offers: true,
},
},
},
},
orderBy:
sortingKey === sortingKeysMap.monthYearReceived
? {
monthYearReceived: order,
}
: sortingKey === sortingKeysMap.totalCompensation
? [
{
offersIntern: {
monthlySalary: {
baseValue: order,
orderBy:
sortingKey === sortingKeysMap.monthYearReceived
? {
monthYearReceived: order,
}
: sortingKey === sortingKeysMap.totalCompensation
? [
{
offersIntern: {
monthlySalary: {
baseValue: order,
},
},
},
},
{
monthYearReceived: 'desc',
},
]
: sortingKey === sortingKeysMap.totalYoe
? [
{
profile: {
background: {
totalYoe: order,
{
monthYearReceived: 'desc',
},
]
: sortingKey === sortingKeysMap.totalYoe
? [
{
profile: {
background: {
totalYoe: order,
},
},
},
},
{
monthYearReceived: 'desc',
},
]
: sortingKey === sortingKeysMap.companyName
? [
{
company: {
name: order,
{
monthYearReceived: 'desc',
},
},
{
monthYearReceived: 'desc',
},
]
: sortingKey === sortingKeysMap.jobTitle
? [
{
offersIntern: {
title: order,
]
: sortingKey === sortingKeysMap.companyName
? [
{
company: {
name: order,
},
},
{
monthYearReceived: 'desc',
},
]
: sortingKey === sortingKeysMap.jobTitle
? [
{
offersIntern: {
title: order,
},
},
{
monthYearReceived: 'desc',
},
]
: { monthYearReceived: 'desc' },
where: {
AND: [
{
location: {
state: {
countryId:
input.countryId != null && input.countryId.length !== 0
? input.countryId
: undefined,
},
},
{
monthYearReceived: 'desc',
},
{
offersIntern: {
isNot: null,
},
]
: { monthYearReceived: 'desc' },
where: {
AND: [
{
location: {
state: {
countryId:
input.countryId != null && input.countryId.length !== 0
? input.countryId
},
{
offersIntern: {
title:
input.title != null && input.title.length !== 0
? input.title
: undefined,
},
},
},
{
offersIntern: {
isNot: null,
{
offersIntern: {
monthlySalary: {
baseValue: {
gte: input.salaryMin ?? undefined,
lte: input.salaryMax ?? undefined,
},
},
},
},
},
{
offersIntern: {
title:
input.title != null && input.title.length !== 0
? input.title
{
offersFullTime: {
is: null,
},
},
{
companyId:
input.companyId && input.companyId.length !== 0
? input.companyId
: undefined,
},
},
{
offersIntern: {
monthlySalary: {
baseValue: {
gte: input.salaryMin ?? undefined,
lte: input.salaryMax ?? undefined,
{
profile: {
background: {
totalYoe: {
gte: yoeMin,
lte: yoeMax,
},
},
},
},
},
{
offersFullTime: {
is: null,
{
monthYearReceived: {
gte: input.dateStart ?? undefined,
lte: input.dateEnd ?? undefined,
},
},
},
{
companyId:
input.companyId && input.companyId.length !== 0
? input.companyId
: undefined,
},
{
profile: {
background: {
totalYoe: {
gte: yoeMin,
lte: yoeMax,
],
},
})
: await ctx.prisma.offersOffer.findMany({
// Junior, Mid, Senior
include: {
company: true,
location: {
include: {
state: {
include: {
country: true,
},
},
},
},
{
monthYearReceived: {
gte: input.dateStart ?? undefined,
lte: input.dateEnd ?? undefined,
offersFullTime: {
include: {
baseSalary: true,
bonus: true,
stocks: true,
totalCompensation: true,
},
},
],
},
})
: await ctx.prisma.offersOffer.findMany({
// Junior, Mid, Senior
include: {
company: true,
location: {
include: {
state: {
include: {
country: true,
},
offersIntern: {
include: {
monthlySalary: true,
},
},
},
offersFullTime: {
include: {
baseSalary: true,
bonus: true,
stocks: true,
totalCompensation: true,
},
},
offersIntern: {
include: {
monthlySalary: true,
},
},
profile: {
include: {
background: true,
offers: true,
profile: {
include: {
background: true,
offers: true,
},
},
},
},
orderBy:
sortingKey === sortingKeysMap.monthYearReceived
? {
monthYearReceived: order,
}
: sortingKey === sortingKeysMap.totalCompensation
? [
{
offersFullTime: {
totalCompensation: {
baseValue: order,
orderBy:
sortingKey === sortingKeysMap.monthYearReceived
? {
monthYearReceived: order,
}
: sortingKey === sortingKeysMap.totalCompensation
? [
{
offersFullTime: {
totalCompensation: {
baseValue: order,
},
},
},
},
{
monthYearReceived: 'desc',
},
]
: sortingKey === sortingKeysMap.totalYoe
? [
{
profile: {
background: {
totalYoe: order,
{
monthYearReceived: 'desc',
},
]
: sortingKey === sortingKeysMap.totalYoe
? [
{
profile: {
background: {
totalYoe: order,
},
},
},
},
{
monthYearReceived: 'desc',
},
]
: sortingKey === sortingKeysMap.companyName
? [
{
company: {
name: order,
{
monthYearReceived: 'desc',
},
},
{
monthYearReceived: 'desc',
},
]
: sortingKey === sortingKeysMap.jobTitle
? [
{
offersFullTime: {
title: order,
]
: sortingKey === sortingKeysMap.companyName
? [
{
company: {
name: order,
},
},
{
monthYearReceived: 'desc',
},
]
: sortingKey === sortingKeysMap.jobTitle
? [
{
offersFullTime: {
title: order,
},
},
{
monthYearReceived: 'desc',
},
]
: { monthYearReceived: 'desc' },
where: {
AND: [
{
location: {
state: {
countryId:
input.countryId != null && input.countryId.length !== 0
? input.countryId
: undefined,
},
},
{
monthYearReceived: 'desc',
},
{
offersIntern: {
is: null,
},
]
: { monthYearReceived: 'desc' },
where: {
AND: [
{
location: {
state: {
countryId:
input.countryId != null && input.countryId.length !== 0
? input.countryId
: undefined,
},
{
offersFullTime: {
isNot: null,
},
},
},
{
offersIntern: {
is: null,
{
offersFullTime: {
title:
input.title != null && input.title.length !== 0
? input.title
: undefined,
},
},
},
{
offersFullTime: {
isNot: null,
{
offersFullTime: {
totalCompensation: {
baseValue: {
gte: input.salaryMin ?? undefined,
lte: input.salaryMax ?? undefined,
},
},
},
},
},
{
offersFullTime: {
title:
input.title != null && input.title.length !== 0
? input.title
{
companyId:
input.companyId && input.companyId.length !== 0
? input.companyId
: undefined,
},
},
{
offersFullTime: {
totalCompensation: {
baseValue: {
gte: input.salaryMin ?? undefined,
lte: input.salaryMax ?? undefined,
{
profile: {
background: {
totalYoe: {
gte: yoeMin,
lte: yoeMax,
},
},
},
},
},
{
companyId:
input.companyId && input.companyId.length !== 0
? input.companyId
: undefined,
},
{
profile: {
background: {
totalYoe: {
gte: yoeMin,
lte: yoeMax,
},
{
monthYearReceived: {
gte: input.dateStart ?? undefined,
lte: input.dateEnd ?? undefined,
},
},
},
{
monthYearReceived: {
gte: input.dateStart ?? undefined,
lte: input.dateEnd ?? undefined,
},
},
],
},
});
],
},
});
const startRecordIndex: number = input.limit * input.offset;
const endRecordIndex: number =
startRecordIndex + input.limit <= data.length
? startRecordIndex + input.limit
: data.length;
let paginatedData = data.slice(startRecordIndex, endRecordIndex);
const startRecordIndex: number = input.limit * input.offset;
const endRecordIndex: number =
startRecordIndex + input.limit <= data.length
? startRecordIndex + input.limit
: data.length;
let paginatedData = data.slice(startRecordIndex, endRecordIndex);
// CONVERTING
const currency = input.currency?.toUpperCase();
if (currency != null && currency in Currency) {
paginatedData = await Promise.all(
paginatedData.map(async (offer) => {
if (offer.offersFullTime?.totalCompensation != null) {
offer.offersFullTime.totalCompensation.value =
await convertWithDate(
offer.offersFullTime.totalCompensation.value,
offer.offersFullTime.totalCompensation.currency,
currency,
offer.offersFullTime.totalCompensation.updatedAt,
);
offer.offersFullTime.totalCompensation.currency = currency;
// CONVERTING
const currency = input.currency?.toUpperCase();
if (currency != null && currency in Currency) {
paginatedData = await Promise.all(
paginatedData.map(async (offer) => {
if (offer.offersFullTime?.totalCompensation != null) {
offer.offersFullTime.totalCompensation.value =
await convertWithDate(
offer.offersFullTime.totalCompensation.value,
offer.offersFullTime.totalCompensation.currency,
currency,
offer.offersFullTime.totalCompensation.updatedAt,
);
offer.offersFullTime.totalCompensation.currency = currency;
if (offer.offersFullTime?.baseSalary != null) {
offer.offersFullTime.baseSalary.value = await convertWithDate(
offer.offersFullTime.baseSalary.value,
offer.offersFullTime.baseSalary.currency,
currency,
offer.offersFullTime.baseSalary.updatedAt,
);
offer.offersFullTime.baseSalary.currency = currency;
}
if (offer.offersFullTime?.baseSalary != null) {
offer.offersFullTime.baseSalary.value = await convertWithDate(
offer.offersFullTime.baseSalary.value,
offer.offersFullTime.baseSalary.currency,
currency,
offer.offersFullTime.baseSalary.updatedAt,
);
offer.offersFullTime.baseSalary.currency = currency;
}
if (offer.offersFullTime?.stocks != null) {
offer.offersFullTime.stocks.value = await convertWithDate(
offer.offersFullTime.stocks.value,
offer.offersFullTime.stocks.currency,
currency,
offer.offersFullTime.stocks.updatedAt,
);
offer.offersFullTime.stocks.currency = currency;
}
if (offer.offersFullTime?.stocks != null) {
offer.offersFullTime.stocks.value = await convertWithDate(
offer.offersFullTime.stocks.value,
offer.offersFullTime.stocks.currency,
currency,
offer.offersFullTime.stocks.updatedAt,
);
offer.offersFullTime.stocks.currency = currency;
}
if (offer.offersFullTime?.bonus != null) {
offer.offersFullTime.bonus.value = await convertWithDate(
offer.offersFullTime.bonus.value,
offer.offersFullTime.bonus.currency,
if (offer.offersFullTime?.bonus != null) {
offer.offersFullTime.bonus.value = await convertWithDate(
offer.offersFullTime.bonus.value,
offer.offersFullTime.bonus.currency,
currency,
offer.offersFullTime.bonus.updatedAt,
);
offer.offersFullTime.bonus.currency = currency;
}
} else if (offer.offersIntern?.monthlySalary != null) {
offer.offersIntern.monthlySalary.value = await convertWithDate(
offer.offersIntern.monthlySalary.value,
offer.offersIntern.monthlySalary.currency,
currency,
offer.offersFullTime.bonus.updatedAt,
offer.offersIntern.monthlySalary.updatedAt,
);
offer.offersFullTime.bonus.currency = currency;
offer.offersIntern.monthlySalary.currency = currency;
} else {
throw new TRPCError({
code: 'NOT_FOUND',
message: 'Total Compensation or Salary not found',
});
}
} else if (offer.offersIntern?.monthlySalary != null) {
offer.offersIntern.monthlySalary.value = await convertWithDate(
offer.offersIntern.monthlySalary.value,
offer.offersIntern.monthlySalary.currency,
currency,
offer.offersIntern.monthlySalary.updatedAt,
);
offer.offersIntern.monthlySalary.currency = currency;
} else {
throw new TRPCError({
code: 'NOT_FOUND',
message: 'Total Compensation or Salary not found',
});
}
return offer;
}),
);
}
return getAdminOffersResponseMapper(
paginatedData.map((offer) => adminDashboardOfferDtoMapper(offer)),
{
currentPage: input.offset,
numOfItems: paginatedData.length,
numOfPages: Math.ceil(data.length / input.limit),
totalItems: data.length,
},
!yoeRange ? JobType.INTERN : JobType.FULLTIME,
);
},
}).query('isAdmin', {
async resolve({ ctx }) {
const userId = ctx.session.user.id;
const result = await ctx.prisma.offersAdmin.findFirst({
where: {
userId
return offer;
}),
);
}
})
return result ? true : false
}
});
return getAdminOffersResponseMapper(
paginatedData.map((offer) => adminDashboardOfferDtoMapper(offer)),
{
currentPage: input.offset,
numOfItems: paginatedData.length,
numOfPages: Math.ceil(data.length / input.limit),
totalItems: data.length,
},
!yoeRange ? JobType.INTERN : JobType.FULLTIME,
);
},
})
.query('isAdmin', {
async resolve({ ctx }) {
const userId = ctx.session.user.id;
const result = await ctx.prisma.offersAdmin.findFirst({
where: {
userId,
},
});
return result ? true : false;
},
});

2
apps/portal/src/server/router/offers/offers-analysis-router.ts
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@ -37,4 +37,4 @@ export const offersAnalysisRouter = createRouter()
async resolve({ ctx, input }) {
return generateAnalysis({ ctx, input });
},
});
});

1
apps/portal/src/server/router/offers/offers-comments-router.ts
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@ -320,7 +320,6 @@ export const offersCommentsRouter = createRouter()
id: input.profileId,
},
});
} else {
throw new trpc.TRPCError({
code: 'UNAUTHORIZED',

2
apps/portal/src/server/router/offers/offers-user-profile-router.ts
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@ -138,4 +138,4 @@ export const offersUserProfileRouter = createProtectedRouter()
},
});
},
});
});

27
apps/portal/src/server/router/questions/questions-question-encounter-user-router.ts
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@ -41,12 +41,13 @@ export const questionsQuestionEncounterUserRouter = createProtectedRouter()
});
}
await tx.questionsQuestion.update({
data: {
lastSeenAt: (questionToUpdate.lastSeenAt === null ||
questionToUpdate.lastSeenAt < input.seenAt)
? input.seenAt : undefined,
lastSeenAt:
questionToUpdate.lastSeenAt === null ||
questionToUpdate.lastSeenAt < input.seenAt
? input.seenAt
: undefined,
numEncounters: {
increment: 1,
},
@ -179,16 +180,16 @@ export const questionsQuestionEncounterUserRouter = createProtectedRouter()
}
await tx.questionsQuestion.update({
data: {
lastSeenAt: lastSeenVal,
numEncounters: {
increment: -1,
},
},
where: {
id: questionToUpdate!.id,
data: {
lastSeenAt: lastSeenVal,
numEncounters: {
increment: -1,
},
});
},
where: {
id: questionToUpdate!.id,
},
});
return questionEncounterDeleted;
});

42
apps/portal/src/utils/offers/randomNameGenerator.ts
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@ -1,8 +1,13 @@
import type { Config } from 'unique-names-generator';
import { adjectives, animals,colors, uniqueNamesGenerator } from 'unique-names-generator';
import {
adjectives,
animals,
colors,
uniqueNamesGenerator,
} from 'unique-names-generator';
import { PrismaClient } from '@prisma/client';
const prisma = new PrismaClient()
const prisma = new PrismaClient();
const customConfig: Config = {
dictionaries: [adjectives, colors, animals],
@ -10,24 +15,23 @@ const customConfig: Config = {
separator: '-',
};
export default async function generateRandomName(): Promise<string> {
let uniqueName: string = uniqueNamesGenerator(customConfig);
let uniqueName: string = uniqueNamesGenerator(customConfig);
let sameNameProfiles = await prisma.offersProfile.findMany({
where: {
profileName: uniqueName
}
})
let sameNameProfiles = await prisma.offersProfile.findMany({
where: {
profileName: uniqueName,
},
});
while (sameNameProfiles.length !== 0) {
uniqueName = uniqueNamesGenerator(customConfig);
sameNameProfiles = await prisma.offersProfile.findMany({
where: {
profileName: uniqueName
}
})
}
while (sameNameProfiles.length !== 0) {
uniqueName = uniqueNamesGenerator(customConfig);
sameNameProfiles = await prisma.offersProfile.findMany({
where: {
profileName: uniqueName,
},
});
}
return uniqueName
}
return uniqueName;
}

2
apps/website/contents/algorithms/sorting-searching.md
Unescape View File

@ -71,7 +71,7 @@ While you're unlikely to be asked to implement a sorting algorithm from scratch
## Things to look out for during interviews
Make sure you know the time and space complexity of the language's default sorting algorithm! The time complexity is almost definitely O(nlog(n))). Bonus points if you can name the sort. In Python, it's [Timsort](https://en.wikipedia.org/wiki/Timsort). In Java, [an implementation of Timsort](https://github.com/openjdk/jdk/blob/d9052b946682d1c0f2629455d73fe4e6b95b29db/src/java.base/share/classes/java/util/TimSort.java) is used for sorting objects, and [Dual-Pivot Quicksort](https://github.com/openjdk/jdk/blob/d9052b946682d1c0f2629455d73fe4e6b95b29db/src/java.base/share/classes/java/util/DualPivotQuicksort.java) is used for sorting primitives.
Make sure you know the time and space complexity of the language's default sorting algorithm! The time complexity is almost definitely O(n log n). Bonus points if you can name the sort. In Python 3.11+, it's [Powersort](https://www.wild-inter.net/posts/powersort-in-python-3.11), which replaced Timsort as the default sorting algorithm. In Java, [an implementation of Timsort](https://github.com/openjdk/jdk/blob/d9052b946682d1c0f2629455d73fe4e6b95b29db/src/java.base/share/classes/java/util/TimSort.java) is used for sorting objects, and [Dual-Pivot Quicksort](https://github.com/openjdk/jdk/blob/d9052b946682d1c0f2629455d73fe4e6b95b29db/src/java.base/share/classes/java/util/DualPivotQuicksort.java) is used for sorting primitives.
## Corner cases

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