ErnWong

Awesome List of Rust Footguns

This will be a living document where I will ocassionally add new "gotchas" I discover with Rust. Do note that I am still learning Rust. I mean, who isn't?

Drops are not guaranteed

8 May 2021.

Dear diary,

ErnWong

E R N E S T   W O N G

ERNEST

ErnWong

#!/usr/bin/env bash

declare -A myarray
myarray["'"]="yes"
echo ${!myarray[@]}
echo ${myarray["'"]}

[[ -v myarray["'"] ]] && echo yes || echo no  # Expected: "yes" printed. Actual: "no" printed.
# Tested on GNU bash version 4.4.20(1)-release

ErnWong

• Track Layer
• Signalling Layer
• Routing Layer
• Train Layer
• Track Circuit Layer

ErnWong

7282
Pass 2 - terminal vocab - #7283
Pass 2 - terminal vocab - #7284
Pass 2 - terminal vocab - #7285
Pass 2 - terminal vocab - #7286
Pass 2 - terminal vocab - #7287
Pass 2 - terminal vocab - #7288
Pass 2 - terminal vocab - #7289
Pass 2 - terminal vocab - #7290
Pass 2 - terminal vocab - #7291

ErnWong

/home/ernwong/anaconda3/envs/NL2code/bin/python /home/ernwong/Downloads/Software/PyCharm/pycharm-professional-2020.1.1/pycharm-2020.1.1/plugins/python/helpers/pydev/pydevconsole.py --mode=client --port=35069

import sys; print('Python %s on %s' % (sys.version, sys.platform))
sys.path.extend(['/home/ernwong/uni/se700/part4project/NL2code'])

PyDev console: starting.

Python 2.7.17 |Anaconda, Inc.| (default, Oct 21 2019, 19:04:46) 
[GCC 7.3.0] on linux2
>>> import os

ErnWong

/home/ernwong/anaconda3/envs/NL2code/bin/python /home/ernwong/Downloads/Software/PyCharm/pycharm-professional-2020.1.1/pycharm-2020.1.1/plugins/python/helpers/pydev/pydevconsole.py --mode=client --port=44163

import sys; print('Python %s on %s' % (sys.version, sys.platform))
sys.path.extend(['/home/ernwong/uni/se700/part4project/NL2code'])

PyDev console: starting.

Python 2.7.17 |Anaconda, Inc.| (default, Oct 21 2019, 19:04:46) 
[GCC 7.3.0] on linux2
>>> runfile('/home/ernwong/uni/se700/part4project/cpp_parser.py', wdir='/home/ernwong/uni/se700/part4project')

ErnWong

Tokens	From below	From horizontal	From above	To below	To horizontal	To above
+	Yes ✔️	Yes ✔️	Yes ✔️	Yes ✔️	Yes ✔️	Yes ✔️
<	No ❌	Yes ✔️	No ❌	Yes ✔️	Yes ✔️	Yes ✔️
>	Yes ✔️	Yes ✔️	Yes ✔️	No ❌	Yes ✔️	No ❌
.,_	Yes ✔️	Yes ✔️	No ❌	Yes ✔️	Yes ✔️	No ❌
'`^*	No ❌	Yes :hea

ErnWong

Ideally we want the following behaviour:

• Feel the inertia of the hammer
• Feel the "bump" as the action mechanism reaches the escapement stage
• Re-engage above the escapement stage without a full reset
• The keys should feel lighter when the damper pedal is pressed
• Key should have an appropriately large radius of rotation as it is pressed so that the effective "weight" is roughly uniform regardless where the key is pressed from.

Essential components:

ErnWong

    environment_genome.from_flattened({
        'water_genes': [
            {
                'amount': 2.58712292237539,
                'smell_signature': [-0.28899390479502074, -0.00830629590648524, 0.09767028130163857, -0.05182467021560022, 0.7185100142896303]
            },
            {
                'amount': 1.439923830198761,
                'smell_signature': [ 0.38302337370748285, -0.617770547361407, 0.8557760937332404, -0.7526113883887016, -0.34273501187112054]
            }