resumeTechnology
Intl.NumberFormat: display a number according to language
Intl.NumberFormat formats numbers for a selected language and way of representation. It does not perform currency recalculation.
Published22 Oct 2026
← All categoriesExplore the topic
Technology
Software, devices and technical concepts, explained clearly.
319 summariesSorted by title
Technology
isolation: a separate context for the layers of a component
isolation: isolate creates a new stacking context without requiring a random z-index just for that purpose.
Published22 Oct 2026
Technology
Itemgetter: selecting a field for sorting
operator.itemgetter('price') creates a function that retrieves the specified key. It can serve as the key argument to sorted() instead of another small custom function.
Published22 Oct 2026
Technology
Itertools.islice: taking part of a stream without a full list
itertools.islice() selects part of an iterable without necessarily copying every value. list(islice(range(100), 3)) gives [0, 1, 2].
Published22 Oct 2026
Technology
join(): turning a list into text with a chosen separator
The method returns a string and does not add a separator after the last item.
Published22 Oct 2026
Technology
JSON: a simple format that requires accurate structure
JSON exchanges data through objects, arrays, and underlying values. Valid syntax is required, but the application must separately verify the meaning of the received.
Published22 Oct 2026
Technology
JSON.parse(): valid syntax does not mean correct schema
After reading, the expected structure should be checked.
Published22 Oct 2026
Technology
JSON.stringify(): which values are not retained as expected
JSON does not represent any JavaScript type without conversion.
Published22 Oct 2026
Technology
Lazy loading: which images can wait
Lazy loading defers resources that are not needed immediately. The most important image on the first screen requires a separate judgment.
Published22 Oct 2026
Technology
line-height: why a number without a unit is convenient
A numeric value is multiplied by the font size and inherited as a multiplier.
Published22 Oct 2026
Technology
localStorage and sessionStorage: what the browser remembers about the page
The two interfaces store values in the browser, but have different life and scope. They are convenient for interface status when the application takes into account their limitations.
Published22 Oct 2026
Technology
Logging: events with levels instead of scattered prints
logging organizes messages by severity and allows their handling to be configured. Named loggers help distinguish events from different application components.
Published22 Oct 2026