Recent questions tagged types

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types - how to check if the input is a number or not in C?

In the main function of C: void main(int argc, char **argv) { // do something here } In the command line, ... in case people typed hello or c? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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types - How to declare a Fixed length Array in TypeScript

At the risk of demonstrating my lack of knowledge surrounding TypeScript types - I have the following ... or clarification appreciated! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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types - Complex numbers in python

Are complex numbers a supported data-type in python? If so, how do you use them? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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689 views

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types - Why doesn't C have unsigned floats?

I know, the question seems to be strange. Programmers sometimes think too much. Please read on... In C I ... of signed integers is undefined. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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types - How do you represent a graph in Haskell?

It's easy enough to represent a tree or list in haskell using algebraic data types. But how would you go about ... So what's really going on? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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796 views

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types - Difference between `data` and `newtype` in Haskell

What is the difference when I write this? data Book = Book Int Int versus newtype Book = Book (Int, ... Book Int Int" is syntactically invalid See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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679 views

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types - Extremely large numbers in javascript

I'm working on the Project Euler problems (currently question 13). For this question I have to find the first 10 ... 'd like to stick to pure JS if possible. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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600 views

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types - Converting stream of int's to char's in java

This has probably been answered else where but how do you get the character value of an int value? Specifically I'm ... int. How do I get a char from this? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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760 views

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types - Is it safe to assume strict comparison in a JavaScript switch statement?

I have a variable that can either be boolean false, or an integer (including 0). I want to put it in a ... by a switch statement is guaranteed to be strict? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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types - Converting number primitives (i32, f64, etc) to byte representations

I am writing a library that encodes/decodes data to/from a binary format. Part of the format is numbers, which I'm using ... u8s (in a Vec<u8> say) into an f32? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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688 views

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types - long long in C/C++

I am trying this code on GNU's C++ compiler and am unable to understand its behaviour: #include <stdio ... it produces values much larger than 10000000000. Why? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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types - How can I round a number in JavaScript? .toFixed() returns a string?

Am I missing something here? var someNumber = 123.456; someNumber = someNumber.toFixed(2); alert(typeof(someNumber) ... to round the number to 2 decimal digits. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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662 views

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types - What is the benefit of zerofill in MySQL?

I just want to know what is the benefit/usage of defining ZEROFILL for INT DataType in MySQL? `id` INT UNSIGNED ZEROFILL NOT NULL Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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637 views

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types - Why doesn't Java throw an Exception when dividing by 0.0?

I have code to calculate the percentage difference between 2 numbers - (oldNum - newNum) / oldNum * 100; - ... does Java ignore it when it comes to doubles? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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649 views

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types - How do I define Lisp’s apply in Haskell?

Shouldn't this definition be allowed in a lazy language like Haskell in which functions are curried? apply f [ ... Lisp for example. Are there any workarounds? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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634 views

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types - Is JavaScript an untyped language?

I've found that some people call JavaScript a "dynamically, weakly typed" language, but some even say "untyped"? Which is it really? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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749 views

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types - Convert a byte array to integer in Java and vice versa

I want to store some data into byte arrays in Java. Basically just numbers which can take up to 2 ... understand so I would appreciate a basic explanation. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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830 views

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types - How to convert a gi-normous integer (in string format) to hex format? (C#)

Given a potentially huge integer value (in C# string format), I want to be able to generate its hex ... convert numbers between hexadecimal and decimal in C#? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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727 views

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types - long/bigint/decimal equivalent datatype in R

What datatype choices do we have to handle large numbers in R? By default, the size of an integer seems to be 32bit ... to say on this as well as in general. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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855 views

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types - Is there a `valueof` similar to `keyof` in TypeScript?

I want to be able to assign an object property to a value given a key and value as inputs yet still be able to ... value: any to be the value of the given key? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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701 views

1 answer

types - Check whether variable is number or string in JavaScript

Does anyone know how can I check whether a variable is a number or a string in JavaScript? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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735 views

1 answer

types - What is the size of column of int(11) in mysql in bytes?

What is the size of column of int(11) in mysql in bytes? And Maximum value that can be stored in this columns? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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648 views

1 answer

types - Should you choose the MONEY or DECIMAL(x,y) datatypes in SQL Server?

I'm curious as to whether or not there is a real difference between the money datatype and something like decimal(19,4 ... , but that's not a valid reason :) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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661 views

1 answer

types - Check if a value is an object in JavaScript

How do you check if a value is an object in JavaScript? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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737 views

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types - Which is the first integer that an IEEE 754 float is incapable of representing exactly?

For clarity, if I'm using a language that implements IEE 754 floats and I declare: float f0 = 0.f; float f1 = ... (MSVC++, Win64), and it seemed fine, though. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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654 views

1 answer

types - biggest integer that can be stored in a double

What is the biggest "no-floating" integer that can be stored in an IEEE 754 double type without losing precision ? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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621 views

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types - How does Python 2 compare string and int? Why do lists compare as greater than numbers, and tuples greater than lists?

The following snippet is annotated with the output (as seen on ideone.com): print "100" < "2" # ... there differences between versions of the Python language? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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738 views

1 answer

types - saving a datatype before fixing additional variable in Isabelle/HOL

I'm fairly new to Isabelle and I'm having some trouble with typing: I would like to have two ... 65903299/saving-a-datatype-before-fixing-additional-variable-in-isabelle-hol...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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