Double-letter variables

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Inspired by One-letter variables

My template for coding full of double-letter defines and functions. Each new addition requires a lot of thought about how to call it.

aa - never use
bb - define begin end (most likely yours "all")
cc - can use for count of c???
dd - dp for down, beside with du, dr and dl
ee - define for single parameter lambda
ff - define for recursive lambda
gg - using for naming function when I spend more then 5 seconds to think about proper name
hh - never
ii - define for create and cin ints (input ints lol) (btw I see it is japanese meta, but I am sure I have started using it first)
jj - same but for arbitrary type
kk - never
ll - using ll = you know
mm - never
nn - never
oo - never but in good old times of icpc my teammate used it for defining infinity
pp - binsearch in template (comes from partition_point)
qq - never but looks like I must use it for something
rr - define for debug printing (comes from cerr)
ss - the only usage: stringstream ss;
tt - counter in program for count some operations (do not believe exec time)
uu - using/used and up, beside with ul, ur and ud
vv - I wanted once to add to template function for create multi-vector and call it vv but failed with design
ww - cant even imagine....
xx - geom??? better x2
yy - in template function to convert bool to yes/no
zz - same as xx

How often you using double-letter naming?

#define y1 Y1 // you know why bool ok(int x1, int y1, int x2, int y2, int x3, int y3, int x4, int y4) { if ((x2 - x1) * (y4 - y3) == (x4 - x3) * (y2 - y1)) { if ((x2 - x1) * (y3 - y1) != (x3 - x1) * (y2 - y1)) return true; if (x1 == x2 && max(y1, y2) <= min(y3, y4)) return true; if (x1 == x2 && max(y3, y4) <= min(y1, y2)) return true; if (x1 != x2 && max(x1, x2) <= min(x3, x4)) return true; if (x1 != x2 && max(x3, x4) <= min(x1, x2)) return true; return false; } int a1 = (x3 - x1) * (y4 - y3) - (y3 - y1) * (x4 - x3); int a2 = (x2 - x1) * (y4 - y3) - (y2 - y1) * (x4 - x3); int b1 = (x3 - x1) * (y2 - y1) - (y3 - y1) * (x2 - x1); int b2 = (x2 - x1) * (y4 - y3) - (y2 - y1) * (x4 - x3); if (a1 * a2 < 0 || abs(a1) > abs(a2)) return true; if (b1 * b2 < 0 || abs(b1) > abs(b2)) return true; if (a1 == a2 * 0 && b1 == b2 * 0) return true; if (a1 == a2 * 1 && b1 == b2 * 0) return true; if (a1 == a2 * 0 && b1 == b2 * 1) return true; if (a1 == a2 * 1 && b1 == b2 * 1) return true; return false; }

Комментарии (13)

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035966_L3

7 месяцев назад, скрыть # |

Well, I can just say I hardly use variable names consisting of more than 2 chars! However, I use "1 letter + 1 digit" more often. Below is an example (guess what it does):

I have to say such variable names give this code..."neatness"?

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Undetermined21

7 месяцев назад, скрыть # ^ |

#define y1 Y1 // you know why

I do not know why :(

The reason is that y1 is defined as a function in the <cmath>library. Directly using y1 sometimes causes Compilation Error if the coder uses <bits/stdc++.h>. It is heard that someone once failed a whole problem (in an OI contest) due to this.

But seemingly this does not happen in Codeforces?

AK_OI

it was me

virinci

The perils of using namespace std; and global variables.

In https://stackoverflow.com/questions/46251041/unable-to-use-y1-as-a-float-variable-in-c if the given code were to be translated to C++ then there will be two name collisions, for y1 and for distance.

ZnZrYb

y1 actually can be used without std::, or it should be user without it, it is in the C,not std library, so it not the perils of using namespace std;

you can try it yourself.

Sad! Forgot that C lib names are not enclosed in the std namespace. There are other names that are used for Bessel functions too, namely j0, j1, jn, y0, y1, and yn.

I can proudly say that I have never used any of these abominations, except ss for stringstream and an array of strings.

Mouse_Mice_Mouse

I always use ss for stringstream and iss for istringstream. It seems I’d always like to split a name into two (or more) words and then put these words' first letters together to be a name for my variables, functions, etc.

Like gd for generate_docs and gg for get_goals (Maybe? I think if someone sees my code that has gg, they would think it's referred to good_game).

MridulAhi

+11

I use aa when I'm stressed out while getting wa2 on an implementation heavy problem in a contest and screaming for it to be over

mrinmoy66sadhukhan

lol

qwq

misty

Sometimes I use ii and jj as iterator names after i and j depending on the logic flow of the problem

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