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Removing first x characters from string?
...For example, if one had a string lipsum , how would they remove the first 3 characters and get a result of sum ?
5 Answer...
Access nested dictionary items via a list of keys?
...
236
Use reduce() to traverse the dictionary:
from functools import reduce # forward compatibility ...
How to create a density plot in matplotlib?
...mpy as np
from scipy.stats import gaussian_kde
data = [1.5]*7 + [2.5]*2 + [3.5]*8 + [4.5]*3 + [5.5]*1 + [6.5]*8
density = gaussian_kde(data)
xs = np.linspace(0,8,200)
density.covariance_factor = lambda : .25
density._compute_covariance()
plt.plot(xs,density(xs))
plt.show()
I get
which is pretty...
Setting href attribute at runtime
...
379
To get or set an attribute of an HTML element, you can use the element.attr() function in jQue...
Find nearest value in numpy array
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531
import numpy as np
def find_nearest(array, value):
array = np.asarray(array)
idx = (np....
Switch case with fallthrough?
...
314
Use a vertical bar (|) for "or".
case "$C" in
"1")
do_this()
;;
"2" | "3")
do_wha...
Aligning rotated xticklabels with their respective xticks
...ption, you want: ha='right'
n=5
x = np.arange(n)
y = np.sin(np.linspace(-3,3,n))
xlabels = ['Ticklabel %i' % i for i in range(n)]
fig, axs = plt.subplots(1,3, figsize=(12,3))
ha = ['right', 'center', 'left']
for n, ax in enumerate(axs):
ax.plot(x,y, 'o-')
ax.set_title(ha[n])
ax.set_...
Python - When to use file vs open
...
153
You should always use open().
As the documentation states:
When opening a file, it's prefer...
App Inventor 2 蓝牙遥控教程 - 经典蓝牙与BLE控制智能硬件 · App Inventor 2 中文网
...对比：经典蓝牙 vs BLE
三、经典蓝牙连接与通信
3.1 组件准备
3.2 蓝牙设备选择与连接
ListPicker 填充已配对设备列表
用户选择设备后建立连接
3.3 发送控制命令
发送...
JdbcTemplate queryForInt/Long is deprecated in Spring 3.2.2. What should it be replaced by?
... queryforInt/queryforLong methods in JdbcTemplate are deprecated in Spring 3.2. I can't find out why or what is considered the best practice to replace existing code using these methods.
...