syntax – Page 6 – Tarik Billa

Recursively access dict via attributes as well as index access?

December 22, 2023 by Tarik

Here’s one way to create that kind of experience: class DotDictify(dict): MARKER = object() def __init__(self, value=None): if value is None: pass elif isinstance(value, dict): for key in value: self.__setitem__(key, value[key]) else: raise TypeError(‘expected dict’) def __setitem__(self, key, value): if isinstance(value, dict) and not isinstance(value, DotDictify): value = DotDictify(value) super(DotDictify, self).__setitem__(key, value) def __getitem__(self, key): … Read more

1064 error in CREATE TABLE … TYPE=MYISAM

December 22, 2023 by Tarik

As documented under CREATE TABLE Syntax: Note The older TYPE option was synonymous with ENGINE. TYPE was deprecated in MySQL 4.0 and removed in MySQL 5.5. When upgrading to MySQL 5.5 or later, you must convert existing applications that rely on TYPE to use ENGINE instead. Therefore, you want: CREATE TABLE dave_bannedwords( id INT(11) NOT … Read more

What do the parentheses signify in (x:xs) when pattern matching?

December 21, 2023 by Tarik

The cons cell doesn’t have to be parenthesized in every context, but in most contexts it is because Function application binds tighter than any infix operator. Burn this into your brain in letters of fire. Example: length [] = 0 length (x:xs) = 1 + length xs If parentheses were omitted the compiler would think … Read more

hardcode byte array in C

December 21, 2023 by Tarik

You can do the same thing in C, but you should declare it of type char[], not char*, so that you can get its size with the sizeof operator: char myArray[] = { 0x00, 0x11, 0x22 }; size_t myArraySize = sizeof(myArray); // myArraySize = 3

What does :-1 mean in python? [duplicate]

December 20, 2023 by Tarik

It is list indexing, it returns all elements [:] except the last one -1. Similar question here For example, >>> a = [1,2,3,4,5,6] >>> a[:-1] [1, 2, 3, 4, 5] It works like this a[start:end] >>> a[1:2] [2] a[start:] >>> a[1:] [2, 3, 4, 5, 6] a[:end] Your case >>> a = [1,2,3,4,5,6] >>> a[:-1] … Read more

What does &* combined together do in Rust?

December 20, 2023 by Tarik

In short: the * triggers an explicit deref, which can be overloaded via ops::Deref. More Detail Look at this code: let s = “hi”.to_string(); // : String let a = &s; What’s the type of a? It’s simply &String! This shouldn’t be very surprising, since we take the reference of a String. Ok, but what … Read more

Android Syntax Highlighting?

December 20, 2023 by Tarik

Are there binary literals in Java?

December 19, 2023 by Tarik

In JDK 7 it is possible: int binaryInt = 0b101; Just prefix your number with 0b.

Brace expansion with variable? [duplicate]

December 19, 2023 by Tarik

Workarounds for not being able to use variables in a sequence brace expression: If the intent is merely to iterate over numbers in a range – as in the OP’s case – the best choice is not to use brace expansion, but instead use bash’s C-style loop – see user000001’s answer. If the specific numbers … Read more

Why does a VB.Net function that returns string only actually return a single character?

December 17, 2023 by Tarik

Note: this answer was originally written by the OP, Kibbee, as a self-answer. However, it was written in the body of the question, not as an actual separate answer. Since the OP has refused repeated requests by other users, including a moderator, to repost in accordance with site rules, I’m reposting it myself. After trying … Read more