What's the difference between heap and stack?

Heap


Definition:

  • (n.) A crowd; a throng; a multitude or great number of persons.
  • (n.) A great number or large quantity of things not placed in a pile.
  • (n.) A pile or mass; a collection of things laid in a body, or thrown together so as to form an elevation; as, a heap of earth or stones.
  • (v. t.) To collect in great quantity; to amass; to lay up; to accumulate; -- usually with up; as, to heap up treasures.
  • (v. t.) To throw or lay in a heap; to make a heap of; to pile; as, to heap stones; -- often with up; as, to heap up earth; or with on; as, to heap on wood or coal.
  • (v. t.) To form or round into a heap, as in measuring; to fill (a measure) more than even full.

Example Sentences:

  • (1) If Lagarde had been placed under formal investigation in the Tapie case, it would have risked weakening her position and further embarrassing both the IMF and France by heaping more judicial worries on a key figure on the international stage.
  • (2) In autumn, leaf-heaps composted themselves on sunken patios, and were shovelled up by irritated owners of basement flats.
  • (3) Across a dusty lot sits a heap of scrap metal, patrolled by a couple of emaciated dogs, while a toddler squats in the street, examining the sole of a discarded shoe.
  • (4) Despite the praise and awards heaped on him Yunus has not become one of those leaders who checks out how important you are before deciding how much of his time you are worth.
  • (5) Not to mention the files they may have already shredded.” One core problem is that too many expectations have been heaped on a trial that cannot bear them all.
  • (6) She responded with Mrs Schofield's GCSE , which heaped up all the grisly murders in Shakespeare.
  • (7) There's been so much abuse heaped upon these communities, and so much rightful anger at the people who stole their lands.
  • (8) It has been established experimentally that the Opisthorchis metacercaria in fish muscles were killed at -28 degrees S in 15-20 h., at -35 degrees C in 8 h. and at -40 degrees C in 2 h. The period of fish freezing becomes much longer when it is stored in snow-covered heaps, which may be the cause of Opisthorchis invasion of wild and domestic carnivorous animals.
  • (9) Tayyab Mahmood Jafri, part of the large team of prosecution lawyers, heaped scorn on yet another discovery of explosives.
  • (10) In the 1980s she was near the bottom of the heap in popularity among US first ladies - coming 36th out of 37 in a 1993 opinion poll.
  • (11) The technology giant heaped pressure on its rivals with a cheaper iPad 2 priced at $399 (£254).
  • (12) Unless those at the bottom of the heap can represent themselves, and the inarticulate will not know how to woo judges, they will be outlaws.
  • (13) Gaddafi, as vigilant keeper of the flame, kept a weather eye open, heaping privileges on some and prestige on others in order to consolidate alliances and plaster over any cracks that threatened to appear.
  • (14) He went on to heap blame on Corrie for her own killing, arguing that, contrary to what "any reasonable person would have done", she "chose to put herself in danger" by trying to impede "a military activity meant to prevent terrorist activity".
  • (15) The far rightwing La Gaceta on a front page editorial heaped insults on the politicians who had voted for the ban, singling out the man who is likely to become the next Catalan president as "a separatist who hates everything Spanish".
  • (16) After weeks of open criticism, Die Welt also heaped praise on the German coaching team’s tactical flexibility.
  • (17) Pseudopolyps which represent polypoid oedematous tags, regenerating mucosal islands between ulcerations or heaped-up granulation tissue covered by epithelium, are a common sequela of ulcerative colitis and may also occur secondary to granulomatous colitis.
  • (18) Yet the Welsh government is set on building more roads like the M4 extension that will bring more harmful pollution and more congestion.” Alan Heaps, who runs a woodwork business from his house on the A472, agreed that radical action was needed.
  • (19) In an attempt to reduce the numbers of this pathogen in this sewage end product, the survival of L. monocytogenes was monitored in a heap of sewage sludge cake stored for over 23 weeks on farm land.
  • (20) The millionaires boom offers little consolation to Africans at the bottom of the heap: South Africa remains one of the most unequal societies in the world.

Stack


Definition:

  • (a.) A large pile of hay, grain, straw, or the like, usually of a nearly conical form, but sometimes rectangular or oblong, contracted at the top to a point or ridge, and sometimes covered with thatch.
  • (a.) A pile of poles or wood, indefinite in quantity.
  • (a.) A pile of wood containing 108 cubic feet.
  • (a.) A number of flues embodied in one structure, rising above the roof. Hence:
  • (a.) Any single insulated and prominent structure, or upright pipe, which affords a conduit for smoke; as, the brick smokestack of a factory; the smokestack of a steam vessel.
  • (a.) A section of memory in a computer used for temporary storage of data, in which the last datum stored is the first retrieved.
  • (a.) A data structure within random-access memory used to simulate a hardware stack; as, a push-down stack.
  • (n.) To lay in a conical or other pile; to make into a large pile; as, to stack hay, cornstalks, or grain; to stack or place wood.

Example Sentences:

  • (1) Thin films (OD approximately 0.7) of glucose-embedded membranes, prepared as a control, showed virtually 100% conversion to the M state, and stacks of such thin film specimens gave very similar x-ray diffraction patterns in the bR568 and the M412 state in most experiments.
  • (2) The planar 7H-pyridocarbazole cations form stacks approximately parallel to b. Interactions between stacks occur by weak van der Waals forces.
  • (3) How does it stack up against the competition – and are there any nasties in the small print?
  • (4) Rayburn, who was also told by his jobcentre he would lose his benefits if he did not work without pay, said he spent almost two months stacking and cleaning shelves and sometimes doing night shifts.
  • (5) Carcinogen-modified oligodeoxynucleotides were single-stranded, but there were often considerable stacking interactions between the pyrenyl residues and the oligonucleotide bases, indicating that electrophoresed oligomers were single-stranded but in a native, versus random coil, conformation.
  • (6) Intermolecular contacts occur in both oligomers in the minor groove: in the B form through twisted guanine-guanine hydrogen bonding, and in the Z form through base-base stacking and the water network.
  • (7) If we were to have a plebiscite before the end of the year, and you were to reverse-engineer that, it would make interesting speculation about the timing of an election.” Abetz said in January he would need to see whether a plebiscite was “above board or whether the question is stacked” before deciding to heed any result in favour of marriage equality.
  • (8) Using polyclonal and monoclonal antibodies we show in normal cells precursor forms of beta-gal in the rough endoplasmic reticulum (RER) and in the Golgi apparatus throughout the stack of cisternae.
  • (9) The AFB1 moiety is face-stacked in the major groove with its long axis approximately perpendicular to the helix axis.
  • (10) Between February and July of 1989, 22 patients underwent the use of the Stack autoperfusion catheter following acute occlusion or obstructive dissection during coronary angioplasty; in 20 cases conventional balloon was used in an attempt to correct the angiographic appearance followed by the use of Stack catheter when results were sub-optimal.
  • (11) The breaking up of the microtubular cytoskeleton is followed by vesiculation of the rough endoplasmic reticulum and partial atrophy, as well as dispersion of the stacks of Golgi cisternae.
  • (12) She walks past stack after stack of books kept behind metal cages, the shelves barely visible in the dim light from the frosted-glass windows.
  • (13) The notochord, which is composed of a stack of flat cells surrounded by a connective tissue sheath, elongates dramatically and begins straightening between stages 21 and 25.
  • (14) However, AGC and AC in their hydrogenated form also caused aggregation and stacking of the stratum corneum lipid liposomes.
  • (15) Their lineup proved to be stacked, with breakouts from AL home run leader Chris Davis and doubles machine Manny Machado, who powered the O's through starting-pitching issues to hang in a tight division.
  • (16) Electron energy-loss spectroscopic element-distribution images are acquired from cytochemical reaction products in a variety of cellular objects: (1) colloidal thorium particles in extra-cellular coat material, (2) iron-containing ferritin particles in liver parenchymal cells, (3) barium-containing reaction products in endoplasmic reticulum stacks, (4) elements present in lysosomal cerium- and barium-containing precipitates connected with acid phosphatase (AcPase) or aryl sulphatase (AS) enzyme activity.
  • (17) We also observed slender tubules connecting Golgi stacks to neighbouring rough endoplasmic reticulum.
  • (18) I always get brown meat on the chicken, and when I do finally remember to stack the dishwasher, do I get any credit?
  • (19) (C13-A14-C15) segment at pH 8.9 establishes that X5 and A14 are directed into the helix, partially stack on each other, and are not stabilized by intermolecular hydrogen bonds.
  • (20) Multiple jobseekers can work in one store at the same time, cleaning or stacking shelves and competing against each other for a potential offer of paid work.