snap

(redirected from opening snap)
Also found in: Dictionary, Thesaurus, Medical, Legal, Acronyms.
Related to opening snap: pericardial knock, ejection click

snap

1. Informal See snapshot
2. Brit a card game in which the word snap is called when two cards of equal value are turned up on the separate piles dealt by each player
3. American football the start of each play when the centre passes the ball back from the line of scrimmage to a teammate

snap

[snap]
(meteorology)
A brief period of extreme (generally cold) weather setting in suddenly, as in a “cold snap.”

SNAP

[snap]
(nucleonics)
A small nuclear power plant in which heat from radioisotope decay in a fuel such as strontium-90 is converted into electric energy, to provide power for spacecraft instrumentation, telemetry, and other applications. Derived from systems for nuclear auxiliary power.

rivet set, rivet snap, setting punch, snap

rivet set
A tool for shaping the head of a rivet.

SNAP

(language)
1. An early (IBM 360?) interpreted text-processing language for beginners, close to basic English.

["Computer Programming in English", M.P. Barnett, Harcourt Brace 1969].

2. ["Some Proposals for SNAP, A Language with Formal Macro Facilities", R.B. Napper, Computer J 10(3):231-243, 1967].

snap

(2)
1. <programming> To remove indirection, e.g. by replacing a pointer to a pointer with a pointer to the final target (see chase pointers).

The underlying metaphor may be a rubber band stretched through a number of points; if you release it from the intermediate points, it snaps to a straight line from first to last.

Often a trampoline performs an error check once and then snaps the pointer that invoked it so subsequent calls will bypass the trampoline (and its one-shot error check). In this context one also speaks of "snapping links". For example, in a Lisp implementation, a function interface trampoline might check to make sure that the caller is passing the correct number of arguments; if it is, and if the caller and the callee are both compiled, then snapping the link allows that particular path to use a direct procedure-call instruction with no further overhead.
References in periodicals archive ?
He was the first teacher of medicine who introduced to us the new concepts of cardiology like opening snap, cardiac clicks and others .
The younger linebackers aren't on the field for the opening snap, but they're in a regular rotation with their more experienced teammates.
From opening snap to final whistle, the Ravens were just faster, stronger and a lot hungrier.