docs: Add NumPy ndarray.view() term entry (#7820)

content/numpy/concepts/ndarray/terms/view/view.md

@@ -0,0 +1,81 @@
+---
+Title: '.view()'
+Description: "Returns a new view of the array's data without copying the underlying memory."
+Subjects:
+  - 'Computer Science'
+  - 'Data Science'
+Tags:
+  - 'Array'
+  - 'Data'
+  - 'NumPy'
+CatalogContent:
+  - 'learn-python-3'
+  - 'paths/data-science'
+---
+
+The **`.view()`** method in NumPy returns a new array object that views the same data as the original array. Both arrays share the same underlying memory block, meaning that any modification to the data in one will directly affect the other. Only the array’s metadata (such as data type or shape) may differ.
+
+Creating a view is much faster and more memory-efficient than creating a copy, especially when working with large arrays.
+
+## Syntax
+
+```pseudo
+ndarray.view([dtype][, type])
+```
+
+**Parameters:**
+
+- `dtype` (data-type): The desired data type for the new array view. Changing the `dtype` changes how the data bytes are interpreted, not the data itself.
+- `type` (type): The desired type for the resulting object (e.g., `np.matrix`).
+
+**Return value:**
+
+Returns a new `ndarray` object that shares the data of the original array.
+
+## Example
+
+In this example, modifying the data in the view (`view_array`) also changes the original array (`original_array`) because both share the same memory:
+
+```py
+import numpy as np
+
+# Create the original array
+original_array = np.array([1, 2, 3, 4, 5])
+
+# Create a view of the original array
+view_array = original_array.view()
+
+print(f"Original Array before modification: {original_array}")
+print(f"View Array before modification: {view_array}")
+
+# Modify a single element in the view
+view_array[0] = 99
+
+print(f"\nOriginal Array after modifying the view: {original_array}")
+```
+
+The output of this code is:
+
+```shell
+Original Array before modification: [1 2 3 4 5]
+View Array before modification: [1 2 3 4 5]
+
+Original Array after modifying the view: [99  2  3  4  5]
+```
+
+## Codebyte Example
+
+In this example, changing the original array also updates its view, since both reference the same data in memory:
+
+```codebyte/python
+import numpy as np
+
+original = np.array([10, 20, 30])
+data_view = original.view()
+
+# Modify the original array's second element
+original[1] = 50
+
+print(f"Original array: {original}")
+print(f"View array: {data_view}")
+```

content/python/concepts/binascii-module/crc-hqx/crc-hqx.md

@@ -0,0 +1,80 @@
+---
+Title: '.crc_hqx()'
+Description: 'Computes the CRC-CCITT hash value for binary data, specifically using the CRC-HQX standard.'
+Subjects:
+  - 'Computer Science'
+  - 'Data Science'
+Tags:
+  - 'Python'
+  - 'binascii'
+  - 'hashing'
+  - 'checksum'
+CatalogContent:
+  - 'learn-python-3'
+  - 'paths/computer-science'
+---
+
+The **`.crc_hqx()`** method is a function within Python's built-in `binascii` module used to compute a 16-bit Cyclic Redundancy Check (CRC) value. This specific implementation uses the parameters of the **CRC-HQX** standard (known for its use in the original Mac OS).
+
+Checksums are primarily used to detect errors in data transmission or storage, ensuring that the data received is identical to the data sent.
+
+## Syntax
+
+The method takes the binary data to be checked and an optional initial CRC value.
+
+```pseudo
+binascii.crc_hqx(data, crc)
+```
+
+## Parameters
+
+* `data` (bytes-like object): The binary data for which the CRC value should be calculated.
+* `crc` (integer): An optional 16-bit starting value for the checksum calculation. If omitted, the initial value is `0`.
+
+## Return Value
+
+Returns an integer representing the 16-bit CRC-HQX checksum of the input data.
+
+## Example
+
+This example demonstrates computing the checksum for a short byte string, both with and without an initial CRC value.
+
+```python
+import binascii
+
+data = b"Codecademy Docs"
+initial_crc = 0xAAAA # A common non-zero starting value
+
+# 1. Compute CRC with a starting value (0xAAAA)
+crc_with_initial = binascii.crc_hqx(data, initial_crc)
+
+# 2. Compute CRC starting from 0
+crc_without_initial = binascii.crc_hqx(data, 0)
+
+print(f"Data: {data!r}")
+print(f"CRC (with initial value 0xAAAA): 0x{crc_with_initial:04x}")
+print(f"CRC (starting from 0): 0x{crc_without_initial:04x}")
+```
+
+**Output:**
+
+```shell
+Data: b'Codecademy Docs'
+CRC (with initial value 0xAAAA): 0x05f0
+CRC (starting from 0): 0xa663
+```
+
+## Codebyte
+
+Use the Codebyte below to calculate the CRC-HQX checksum for your own byte string.
+
+```python
+import binascii
+
+data_to_check = b"Python Contributor"
+
+# Calculate the CRC-HQX checksum starting from 0
+checksum = binascii.crc_hqx(data_to_check, 0)
+
+print(f"Checksum: 0x{checksum:04x}")
+```