Search Hoogle Identifier Ptghci

Search for identifiers within Hoogle while using ptghci.

Terminal

%hoogle <identifier>

%hoogle <identifier>

#!/bin/bash

# Search Hoogle Identifier Ptghci
%hoogle {{identifier}}

import subprocess

# Search Hoogle Identifier Ptghci
# Make sure to replace <placeholders> with actual values
def run_command():
    cmd = [
        "hoogle",
        "<identifier>"
    ]
    
    try:
        print(f"Executing: {' '.join(cmd)}")
        subprocess.run(cmd, check=True)
    except subprocess.CalledProcessError as e:
        print(f"Error: {e}")
    except FileNotFoundError:
        print("Error: hoogle not found. Please install it first.")

if __name__ == "__main__":
    run_command()

When To Use

During library or function exploration to find Haskell identifiers and their usage.

Pro Tip

Use specific filters like `--exact` for pinpointed results on common identifiers.

Anatomy of Output

Understanding the result

Searching for: identifier Identifier Searched

Reflects the term passed into the search.

Results: 5 matching entries found. Search Outcome

Indicates the number of hits for the search.

1. identifierA - Description of usage First Result

Information on the first relevant identifier.

Power User Variants

Optimized versions

hoogle %hoogle --exact identifier

Search for the exact match of an identifier.

hoogle %hoogle --type class

Limit search to specific types of Haskell entities.

Troubleshooting

Common pitfalls

Error: Identifier not found in Hoogle.

Solution: Ensure that the correct identifier is used in the search.

Warning: Search limit exceeded; showing only the first 10 results.

Solution: Narrow down search criteria for more relevant results.

Error: Hoogle service unavailable.

Solution: Check connectivity to Hoogle service endpoint.

Command Breakdown

What each part is doing

%hoogle: Base Command; The executable that performs this operation. Here it runs Hoogle before the shell applies any redirect operators.
<identifier>: identifier; The value supplied for identifier.

Alternative Approaches

Comparable commands in other tools

Alternative programming tools for the same job.

Perl / Say First Match Group Ignore Space perl -n -E 'say $1 if m/<before> ( <group_regex> ) <after>/x' Perl / Print Lines Matching Regex Case Insensitive perl -n -e 'print if m/regex1/ and m/regex2/i' Ag / Case Insensitive Only Matching ag -i -o STRING Find / Print Fields With Nul Terminated Lines <find . -print0> | cut -z -d "</>" -f <2> Ast Grep / Display Help For Subcommand ast-grep {run} {-h|--help}