resumeTechnology
try...catch: handling a specific failure
try...catch allows us to react to a thrown exception. Processing should lead to clear action, not just hide the problem.
Published22 Oct 2026
Discover something new
All summaries
1274 results
Technology
The ?? operator: keeping zero instead of replacing it with a default
?? uses a reserve value only at null or undefined. Zero, false and blank text can remain valid data.
Published22 Oct 2026
Technology
Optional chaining: access to a property that may be missing
The ?. operator terminates access at null or undefined. It does not hide arbitrary errors in performance.
Published22 Oct 2026
Technology
Intl.DateTimeFormat: one moment in different time zones
Formatting a date requires a choice of language and time zone. The same value can be displayed as a different local time.
Published22 Oct 2026
Technology
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
Technology
Number.isNaN(): check NaN without hidden conversion
Number.isNaN() checks whether the value is actually the numerical NaN. Plain text is not automatically converted to a number.
Published22 Oct 2026
Technology
replaceAll(): one substitution for all exact matches
replaceAll() returns new text with all matches found replaced according to the specified rule.
Published22 Oct 2026
Technology
trim(): removing whitespace around entered text
trim() returns new text without the whitespace at the beginning and end. Internal intervals remain.
Published22 Oct 2026
Technology
includes(): finding text and understanding case sensitivity
includes() checks if text contains another sequence. Capital and small letters matter.
Published22 Oct 2026
Technology
Object.fromEntries(): back from pairs to object
Object.fromEntries() creates an object of key-value pairs. Check the repeated keys if you don't want later values to replace earlier ones.
Published22 Oct 2026
Technology
Object.entries(): properties as a list of pairs
Object.entries() converts its own enumerable text properties into pairs. This makes the crawling of settings clearer.
Published22 Oct 2026
Technology
Map: when the identifier must result in a value
Map stores key-value pairs and remembers the order of addition. set() and get() work with the collection, not with arbitrary properties on the object.
Published22 Oct 2026