Coding Ref
Coding Ref
Articles about programming, web development, databases, statistics, and cloud computing.

    exit(0) and exit(1) in C

    c

    Updates were rejected because the tip of your current branch is behind

    git

    What is GraphQL enum?

    sql

    Filtering in GraphQL

    sql

    GraphQL Mutations

    graphql

    RGB color codes

    html

    Could not find module '@angular-devkit/build-angular'

    javascriptangular

    Cannot use import statement outside a module in JavaScript

    javascript

    ReferenceError: document is not defined in JavaScript

    javascript

    Returning multiple values in JavaScript

    javascript

    Sort dates in JavaScript

    javascript

    Unexpected token u in JSON at position 0 Error

    javascript

    How to create a 3D plot in MATLAB

    matlab

    How to plot a Bode in MATLAB

    matlab

    MATLAB linspace

    matlab

    How to plot colors in MATLAB

    matlab

    How to plot a legend in MATLAB

    matlab

    How to plot a line in MATLAB

    matlab

    Plot markers in MATLAB

    matlab

    How to plot points in MATLAB

    matlab

    How to create a scatter plot in MATLAB

    matlab

    MATLAB subplot

    matlab

    How to create a surface plot in MATLAB

    matlab

    SUBSTR function in Oracle SQL

    oracle-sql

    How to Fix “Your PHP Installation Appears to Be Missing the MySQL Extension Which Is Required by WordPress” Error

    phpwordpressmysql

    How to comment and uncomment in PostgreSQL

    postgres

    The difference between add-content and set-content

    powershell

    Add-Content in PowerShell

    powershell

    How to add a user to a group in PowerShell

    powershell

    How to create an alias in PowerShell

    powershell

    How to append content to a file in PowerShell

    powershell

    Boolean literals in PowerShell

    powershell

    Everything about certificates in PowerShell

    powershell

    What are classes in PowerShell?

    powershell

    How to use -Contains in PowerShell

    powershell

    How to count objects in PowerShell

    powershell

    How to create a directory in PowerShell

    powershell

    How to get the current directory in PowerShell

    powershell

    Dictionaries in PowerShell

    powershell

    Do Until in PowerShell

    powershell

    PowerShell do-while loop

    powershell

    What is Echo in PowerShell?

    powershell

    How to check for equality in PowerShell

    powershell

    How to use ErrorAction in PowerShell

    powershell

    How to use PowerShell exit codes

    powershell

    The difference between -ExpandProperty and -Property in PowerShell

    powershell

    What is PowerShell ExpandProperty?

    powershell

    What are the different PowerShell file types?

    powershell

    How to find special characters in PowerShell

    powershell

    How to install PowerShell on Mac

    powershell

    How to use Format-Table in PowerShell

    powershell

    How to exclude multiple folders using Get-ChildItem in PowerShell

    powershell

    How to use -filter in Get-ChildItem in PowerShell

    powershell

    Get the full path of ChildItem in PowerShell

    powershell

    What is PowerShell Get-ChildItem?

    powershell

    How to get the date in PowerShell

    powershell

    How to get the host or computer name in PowerShell

    powershell

    How to get processes in PowerShell

    powershell

    How to find the Windows version from the PowerShell command line

    powershell

    How to declare global variables in PowerShell

    powershell

    What is PowerShell Grep?

    powershell

    What is a PowerShell Hashtable?

    powershell

    What is IEX in PowerShell?

    powershell

    How to use If Else in PowerShell

    powershell

    How to join a domain in PowerShell

    powershell

    How to stop Windows PowerSHell from randomly popping up

    powershell

    How to list all installed modules in PowerShell

    powershell

    What is PowerShell logging?

    powershell

    What is `ls` for PowerShell?

    powershell

    How to make a directory in PowerShell

    powershell

    How to move items in PowerShell

    powershell

    How to write multiple-line comments in PowerShell

    powershell

    How to create new items in PowerShell

    powershell

    Not equal to in PowerShell

    powershell

    What is null in PowerShell?

    powershell

    Using -Or in PowerShell

    powershell

    How to order a hashtable in PowerShell

    powershell

    How to copy and paste into PowerShell

    powershell

    How to pause in PowerShell

    powershell

    How to ping in PowerShell

    powershell

    Piping in PowerShell

    powershell

    How to print output in PowerShell

    powershell

    What is read-host in PowerShell?

    powershell

    How to rename a computer in PowerShell

    powershell

    How to rename a file in PowerShell

    powershell

    How to rename a folder in PowerShell

    powershell

    How to restart a service in PowerShell

    powershell

    How to use Robocopy in PowerShell

    powershell

    How to run a .bat file in PowerShell

    powershell

    What is a Scriptblock in PowerShell?

    powershell

    How to select an object in PowerShell

    powershell

    How to use SFTP in PowerShell

    powershell

    How to Sign a PowerShell Script

    powershell

    How to sort and filter data in PowerShell

    powershell

    How to sort in PowerShell

    powershell

    How to use Start-Job in PowerShell

    powershell

    How to use String Contains in PowerShell

    powershell

    String formatting in PowerShell

    powershell

    String Interpolation in PowerShell

    powershell

    How to get the string length of a variable in PowerShell

    powershell

    Substrings in PowerShell

    powershell

    Switch statement in PowerShell

    powershell

    How to trim text in PowerShell

    powershell

    How to unzip a file in Powershell

    powershell

    What are verbs in PowerShell?

    powershell

    PowerShell vs. Bash

    powershell

    How to wait in PowerShell

    powershell

    What is WhatIf in PowerShell?

    powershell

    While loops in PowerShell

    powershell

    What is Write-Host in PowerShell?

    powershell

    How to find elements by class in BeautifulSoup

    beautiful soup

    How to fix: Can only use .str accessor with string values, which use np.object_ dtype in pandas

    python

    Delete Conda environment

    pythonconda

    Convert JSON to CSV in Python

    python

    Flatten a list in Python

    python

    How to fix: IndentationError expected an indented block in Python

    python

    How to fix: Unindent does not match any outer indentation level in Python

    python

    IndexError: list index out of range

    python

    ModuleNotFoundError: No module named 'cv2' in Python

    python

    ModuleNotFoundError: No module named 'matplotlib' in Python

    python

    ModuleNotFoundError: No module named 'numpy' in Python

    pythonnumpy

    ModuleNotFoundError: No module named 'pandas' in Python

    python

    ModuleNotFoundError: No module named 'requests' in Python

    python

    ModuleNotFoundError: No module named 'pip' in Python

    python

    What does numpy.arrange() do?

    numpy

    How to use numpy.clip() in Python

    numpy

    How to use numpy.exp() in Python

    numpy

    How to use numpy.ndarray.flatten() in Python

    numpy

    How to use numpy.hstack() in Python

    numpy

    How to use numpy.linspace() in Python

    numpy

    NumPy: np.arrange()

    numpy

    How to use numpy.percentile() in Python

    numpy

    How to use numpy.random.uniform() in Python

    numpy

    How to use numpy.ravel() in Python

    numpy

    How to use numpy.round() in Python

    numpy

    NumPy numpy.transpose()

    numpy

    How to use numpy.vstack() in Python

    numpy

    How to use numpy.zeros() in Python

    numpy

    How to get the absolute value for a column in Pandas

    pandas

    How to add an empty column to a Pandas DataFrame

    pandas

    How to apply a function to multiple columns in Pandas

    pandas

    How to use applymap() in Pandas

    pandas

    How to use astype() in Pandas

    pandas

    How to create a bar chart in Pandas

    pandas

    How to fix: ValueError: pandas cannot reindex from a duplicate axis

    pandas

    What is categorical data in Pandas?

    pandas

    How to change the order of columns in Pandas

    pandas

    How to concatenate in Pandas

    pandas

    How to convert string to float in Pandas

    pandas

    What does Count() do in Pandas?

    pandas

    How to calculate covariance in Pandas

    pandas

    How to make a crosstab in Pandas

    pandas

    What is Pandas Cumsum()?

    pandas

    What is date_range() in Pandas?

    pandas

    What does Diff() do in Pandas?

    pandas

    How to drop duplicate columns in Pandas

    pandas

    How to drop duplicate rows in Pandas

    pandas

    How to drop an index column in Pandas

    pandas

    How to use ewm() in Pandas

    pandas

    What does factorize() do in Pandas?

    pandas

    How to use ffill() in Pandas

    pandas

    fillna() in Pandas

    pandas

    How to filter a Pandas DataFrame

    pandas

    How to create a freqeuncy table in Pandas

    pandas

    How to get the first row in Pandas

    pandas

    How to GroupBy Index in Pandas

    pandas

    How to groupby mean in Pnadas

    pandas

    How to groupby, then sort within groups in Pandas

    pandas

    What does Head() do in Pandas?

    pandas

    What is idxmax() in Pandas?

    pandas

    How to convert a Pandas Index to a List

    pandas

    What is insert() in Pandas?

    pandas

    What is isna() in Pandas?

    pandas

    How to use intertuples() in Pandas

    pandas

    How to join two DataFrames in Pandas

    pandas

    How to give multiple conditions in loc() in Pandas

    pandas

    How to use pandas map() function

    pandas

    How to find the minimum in Pandas

    pandas

    How to find the mode in a Pandas DataFrame

    pandas

    How to fix: AttributeError module 'pandas' has no attribute 'dataframe'

    pandas

    What is nlargest() in Pandas?

    pandas

    How to normalize a column in Pandas

    pandas

    What is .notnull in Pandas?

    pandas

    How to get the number of columns in a Pandas DataFrame

    pandas

    How to use nunique() in Pandas

    pandas

    How to print a specific row in a Pandas DataFrame?

    pandas

    How to use qcut() in Pandas

    pandas

    Pandas read SQL

    sqlpandas

    How to read a TSV file in Pandas

    pandas

    How to reorder columns in Pandas

    pandas

    How to reset index in a Pandas DataFrame

    pandas

    How to reshape a Pandas DataFrame

    pandas

    How to round in Pandas

    pandas

    How to select multiple columns in Pandas

    pandas

    How to sort a series in Pandas

    pandas

    How to convert a series to a list in Pandas

    pandas

    How to convert a series to a NumPy array in Pandas

    pandas

    How to shuffle data in Pandas

    pandas

    How to sort by two columns in Pandas

    pandas

    How to split a Pandas DataFrame by a column value

    pandas

    How to stack two Pandas DataFrames

    pandas

    How to calculate the standard deviation in Pandas DataFrame

    pandas

    How to use str.contains() in Pandas

    pandas

    How to use str.split() in Pandas

    pandas

    How to use Timedelta in Pandas

    pandas

    How to convert Pandas timestamp to datetime

    pandas

    How to write a Pandas DataFrame to SQL

    pandas

    How to calculate the variance in Pandas DataFrame

    pandas

    How to use where() in Pandas

    pandas

    Syntax Error: invalid syntax

    python

    SyntaxError: unexpected EOF while parsing

    python

    ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

    python

    TypeError: a bytes-like object is required, not 'str'

    python

    TypeError: only integer scalar arrays can be converted to a scalar index

    python

    TypeError: string indices must be integers

    python

    How to fix: pandas data cast to numpy dtype of object. Check input data with np.asarray(data)

    python

    ValueError: setting an array element with a sequence

    python

    $ operator is invalid for atomic vectors in R

    r

    Error in file(file, "rt") : cannot open the connection

    r

    Error in plot.new() : figure margins too large

    r

    Non-numeric argument to binary operator error in R

    r

    R: the condition has length > 1 and only the first element will be used

    r

    What does Spark SQL shuffle partitions do?

    spark-sql

    Splunk commands

    splunk

    How to extract a field in Splunk

    splunk

    Splunk vs. Datadog

    splunk

    ABS function in SQL

    sql

    SQL aliases

    sql

    What is SQL ALL?

    sql

    How to fix the 'Ambiguous Column Name' error in SQL

    sql

    What is an anti join in SQL?

    sql

    What is SQL ANY?

    sql

    What is the AS statement in SQL?

    sql

    Calculating averages in SQL

    sql

    How to use between inclusive in SQL?

    sql

    What is a blind SQL injection?

    sql

    Block comments in SQL

    sql

    What is cardinality in SQL?

    sql

    How to combine two columns in SQL

    sql

    SQL Comments

    sql

    How to concatenate strings in SQL

    sql

    What is the unique constraint in SQL?

    sql

    How to get the day of the week in SQL

    sql

    Find column names in SQL

    sql

    What is bulk insert in SQL?

    sql-server

    What is CAST function in SQL?

    sql