Use the. test() method
let testString = "My test string";let testRegex = /string/;testRegex.test(testString);
Match multiple patterns
Use operation symbols|
const regex = /yes|no|maybe/;
Use the i flag to ignore case
const caseInsensitiveRegex = /ignore case/i;const testString = 'We use the i fl ...
Posted by stone.cold.steve.austin on Mon, 23 Mar 2020 07:50:38 -0700
Memory address and pointer of variable
Assignment of pointer variable
Pointer variable operators and operations
Pointer variable operation
Pointer variable as function parameter
Change from data variable to pointer variable
Change from pointer variable to data variable
Array and ad ...
Posted by Frozen Kiwi on Thu, 12 Mar 2020 20:07:33 -0700
matplotlib is inspired by MATLAB. Matlab is a widely used language and tool in the field of data drawing. MATLAB language is process oriented. Using function call, matlab can easily use a line of command to draw lines, and then use a series of functions to adjust the results.
Matplotlib has a set of dra ...
Posted by jomofee on Sat, 07 Mar 2020 08:13:18 -0800
Interpretation of matplotlib in vernacular - line chart
Interpretation of matplotlib in vernacular - general function and histogram,Interpretation of matplotlib in vernacular - histogram,Colloquial interpretation of matplotlib usage - adding data to columns
Hello, this is W
In the fi ...
Posted by matt2012 on Sun, 23 Feb 2020 03:49:09 -0800
1. Definition of string:
A finite sequence of zero or more characters, also known as a string
Empty string without characters
A string with only spaces is called a space string
2. Abstract data type of string:
ADT String ( string)
//The element of a string consists of only one character, and the ...
Posted by seavolvox on Sat, 22 Feb 2020 04:56:51 -0800
C × unsafe code
When a code block is marked with the unsafe modifier, C ා allows pointer variables to be used in functions. Unsafe or unmanaged code refers to blocks of code that use pointer variables.
A pointer is a variable whose value is the address of another variable, tha ...
Posted by Gokul on Thu, 16 Jan 2020 05:46:52 -0800
#Creating a line plot
#Importing the required packages
from bokeh.io import output_file, show
from bokeh.plotting import figure
#Creating our data arrays used for plotting the line plot
x = [5,6,7,8,9,10]
y = [1,2,3,4,5,6]
#Calling the figure() function to create the figure of the plot
plot = figure()
#Creating a ...
Posted by Madzz on Sat, 11 Jan 2020 07:27:08 -0800
1, Definition of function
def function name (parameter list):
Return statement without writing or adding any object after it is return None
2, Parameters of function
Posted by kelseyirene on Thu, 02 Jan 2020 20:59:44 -0800
Regular expression is the way to deal with strings. It can perform specific character handlers such as find, delete, and replace.
Common commands grep, awk, sed
[: alunm:] represents English case characters and numbers, i.e. 0-9 A-Z a-z
[: alpha:] represents any English case letter A-Z A-Z
[: blank:] represents the space b ...
Posted by cuteflower on Wed, 01 Jan 2020 02:07:59 -0800
1. In the first case, I do not define the xml layout file at all. The layout file is completely written in the Java file. The code is as follows:
import and ...
Posted by Cateyes on Sun, 01 Dec 2019 13:50:18 -0800