yzhong52

CC := g++
CFLAGS := -Wall -g
TARGET := example

# $(wildcard *.cpp /xxx/xxx/*.cpp): get all .cpp files from the current directory and dir "/xxx/xxx/"
SRCS := $(wildcard *.cpp)
# $(patsubst %.cpp,%.o,$(SRCS)): substitute all ".cpp" file name strings to ".o" file name strings
OBJS := $(patsubst %.cpp,%.o,$(SRCS))

all: $(TARGET)

yzhong52

Preferences > Key Bindings:

[
    { "keys": ["alt+command+l"], "command": "reindent" , "args": {"single_line": false}}
]

Preferences > Settings:

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#!/usr/bin/env bash

replace_or_fail() {
    FROM_VALUE=$1
    TO_VALUE=$2
    FILENAME=$3
    echo "Replace from '$FROM_VALUE' to '$TO_VALUE' in '$FILENAME'... "
    grep -q ${FROM_VALUE} ${FILENAME} && sed -i.old 's/'${FROM_VALUE}'/'${TO_VALUE}'/' ${FILENAME} || ( (>&2 echo "\033[0;31mError: '$FROM_VALUE' not found") && exit 1 )
    echo "Done. "
}

yzhong52

alias generation

Genereate alias for each of the git folder in ~/Documents.

1. Run the script python3 alia_gen.py
2. Add the following to .bash_profile

# Added by Yuchen: using alias!
if [ -f ~/.alias_gen ]; then 

yzhong52

[CA2 yzhong@ca2-p1v01-mon4-0001 ~]$ sudo systemctl status -l -n 20 prometheus.service
● prometheus.service - Prometheus
   Loaded: loaded (/etc/systemd/system/prometheus.service; enabled; vendor preset: disabled)
   Active: active (running) since Fri 2019-08-09 17:04:21 UTC; 4 days ago
  Process: 16654 ExecReload=/bin/kill -s HUP $MAINPID (code=exited, status=0/SUCCESS)
 Main PID: 15929 (prometheus)
   CGroup: /system.slice/prometheus.service
           └─15929 /opt/prometheus/prometheus/prometheus --config.file /opt/prometheus/prometheus/prometheus.yml --storage.tsdb.path=/srv/prometheus/prometheus --storage.tsdb.retention=120d --web.listen-address=0.0.0.0:9090

Aug 13 21:19:42 ca2-p1v01-mon4-0001.ca2.internal.zone prometheus[15929]: level=warn ts=2019-08-13T21:19:42.797Z caller=manager.go:513 component="rule manager" group=HoustonDashboard msg="Evaluating rule failed" rule="alert: HoustonDashboardBackendErrorRate\nexpr: ((sum by(instance) (rate(haproxy_backend_http_responses_total{backend=~\"houston-dashboa

yzhong52

[CA2 yzhong@ca2-p1v01-mon4-0001 ~]$ sudo systemctl status -l -n 20 prometheus.service
● prometheus.service - Prometheus
   Loaded: loaded (/etc/systemd/system/prometheus.service; enabled; vendor preset: disabled)
   Active: active (running) since Fri 2019-08-09 17:04:21 UTC; 4 days ago
  Process: 16654 ExecReload=/bin/kill -s HUP $MAINPID (code=exited, status=0/SUCCESS)
 Main PID: 15929 (prometheus)
   CGroup: /system.slice/prometheus.service
           └─15929 /opt/prometheus/prometheus/prometheus --config.file /opt/prometheus/prometheus/prometheus.yml --storage.tsdb.path=/srv/prometheus/prometheus --storage.tsdb.retention=120d --web.listen-address=0.0.0.0:9090

Aug 13 21:19:42 ca2-p1v01-mon4-0001.ca2.internal.zone prometheus[15929]: level=warn ts=2019-08-13T21:19:42.797Z caller=manager.go:513 component="rule manager" group=HoustonDashboard msg="Evaluating rule failed" rule="alert: HoustonDashboardBackendErrorRate\nexpr: ((sum by(instance) (rate(haproxy_backend_http_responses_total{backend=~\"houston-dashboa

yzhong52

In regular python array, a slice view of an array is actually a copy. Modifiying elements through the slice won't affect the original array.

>>> arr = [0, 1, 2]
>>> arr[0:][0] = 100
>>> arr
[0, 1, 2]

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import numpy as np
def read_obj(filename):
    triangles = []
    vertices = []
    with open(filename) as file:
        for line in file:
            components = line.strip(' \n').split(' ')
            if components[0] == "f": # face data
                # e.g. "f 1/1/1/ 2/2/2 3/3/3 4/4/4 ..."
                indices = list(map(lambda c: int(c.split('/')[0]) - 1, components[1:]))

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vertices, triangles = read_obj("teapot.obj")
x = vertices[:,0]
y = vertices[:,1]
z = vertices[:,2]
ax = plt.axes(projection='3d')
ax.set_xlim([-3, 3])
ax.set_ylim([-3, 3])
ax.set_zlim([0, 3])
ax.plot_trisurf(x, z, triangles, y, shade=True, color='white')

yzhong52

import Foundation

class Article: Decodable {
    let title: String
    let description: String?
    let url: URL
    let urlToImage: String?
    let content: String?
}