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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to create a dummy file of any size with PowerShell?
To create any dummy file of having any size with PowerShell, we can use the below command.Example$f = new-object System.IO.FileStream c:\temp\test.dat, Create, ReadWrite $f.SetLength(50MB) $f.Close()The above command will create 50MB of Test.dat dummy file in the C:\temp. Such files are used for testing purposes.
Read MoreHow to get the default Documents from the IIS site using PowerShell?
To get the default documents stored on the IIS default website page, you can use the below command.ExampleGet-WebConfigurationProperty -Filter //defaultDocument/files/add -PSPath 'IIS:\Sites\Default Web Site' -Name value ` | select valueOutputValue ----- Default.htm Default.asp index.htm index.html iisstart.htmTo check if the Default document contains a specific file, (Get-WebConfigurationProperty -Filter //defaultDocument/files/add -PSPath 'IIS:\Sites\Default Web Site' -Name value).value -contains 'iisstart.htm'The above command checks if the IIS default website contains any iisstart.htm on the default document page.You can also use another website instead of using 'Default Web site'. To get the default documents file at the IIS level, (Get-WebConfigurationProperty -Filter //defaultDocument/files/add -PSPath 'IIS:' ...
Read MoreHow to copy only updated or newer files with PowerShell?
To copy only updated or newer files with PowerShell, we can use Copy-Item with some logic in the script that to check if the files exist on the destination folder if not then copy that file and if yes then compare the timestamp and copy the latest file. This would be tricky because we need to write several lines of code for it.But Windows support xCopy utility which can directly copy the newer or updated files and this utility we can accommodate in PowerShell as well.xCopy uses a switch called /d. its actual syntax is, Syntax/d [:MM-DD-YYYY]This means if the date ...
Read MoreGolang Program to find the position of the rightmost set bit
ExamplesConsider n = 20(00010100)Now return log2(20 & -20) => 2+1 => 3Approach to solve this problemStep 1 − Define a method, where n and is an argument, return type is int.Step 2 − Return log2(n & -n)+1.Examplepackage main import ( "fmt" "math" "strconv" ) func FindRightMostSetBit(n int) int { if (n & 1) != 0{ return 1 } return int(math.Log2(float64(n & -n))) + 1 } func main(){ var n = 20 fmt.Printf("Binary of %d is: %s.", n, strconv.FormatInt(int64(n), 2)) fmt.Printf("Position of the rightmost set bit of the given number %d is %d.", n, FindRightMostSetBit(n)) }OutputBinary of 20 is: 10100. Position of the rightmost set bit of the given number 20 is 3.
Read MoreGolang Program to toggle the Kth of the given number n.
ExamplesConsider n = 20(00010100), k = 3.After toggling the kth bit of the given number: 00010000 => 16.Approach to solve this problemStep 1 − Define a method, where n and k would be the arguments, returns type is int.Step 2 − Perform AND operation with n ^ (1
Read MoreGolang program to check if k'th bit is set for a given number or not.
ExamplesConsider n = 20(00010100), k = 3So, the result after turning off the 3rd bit => 00010000 & (1
Read MoreGolang Program to turn on the k'th bit in a number.
Example For example consider n = 20(00010100), k = 4. So result after turning on 4th bit => 00010000 | (1
Read MoreGolang program to turn off the k'th bit in a number.
ExampleConsider n = 20(00010100), k = 3 The result after turning off the 3rd bit => 00010000 & ^(1 16sApproach to solve this problemStep 1 − Define a method, where n and k would be the arguments, return type is int.Step 2 − Perform AND operation with n & ^(1
Read MoreText box with line wrapping in Matplotlib
Matplotlib can wrap text automatically, but if it's too long, the text will be displayed slightly outside of the boundaries of the axis anyways.StepsCreate a new figure, or activate an existing figure, using figure().Set the axis properties using plt.axis() method.Make a variable input_text to store the string.Add text to figure, using plt.text() method where style='oblique', ha='center', va='top', ...etc.To show the figure use plt.show() method.Exampleimport matplotlib.pyplot as plt fig = plt.figure() plt.axis([0, 10, 0, 10]) input_text = 'Matplotlib is a plotting library for the Python programming language and its numerical mathematics extension NumPy.' plt.text(5, 5, input_text, fontsize=10, style='oblique', ha='center', va='top', ...
Read MorePlot mean and standard deviation in Matplotlib
First, we can calculate the mean and standard deviation of the input data using Pandas dataframe.Then, we could plot the data using Matplotlib.StepsCreate a list and store it in data.Using Pandas, create a data frame with data (step 1), mean, std.Plot using a dataframe.To show the figure, use plt.show() method.Exampleimport pandas as pd from matplotlib import pyplot as plt data = [-5, 1, 8, 7, 2] df = pd.DataFrame({ 'data': data, 'mean': [2.6 for i in range(len(data))], 'std': [4.673328578 for i in range(len(data))]}) df.plot() plt.show()Output
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