
默认文件1590972322350.png
问题
拷贝大切片一定比小切片代价大吗?
怎么答
并不是,所有切片的大小相同;三个字段(一个 uintptr,两个int)。切片中的第一个字是指向切片底层数组的指针,这是切片的存储空间,第二个字段是切片的长度,第三个字段是容量。将一个 slice 变量分配给另一个变量只会复制三个机器字。所以 拷贝大切片跟小切片的代价应该是一样的。
解释
SliceHeader
是切片
在go的底层结构。
type SliceHeader struct { Data uintptr Len int Cap int}
- 大切片跟小切片的区别无非就是
Len
和Cap
的值比小切片的这两个值大一些,如果发生拷贝,本质上就是拷贝上面的三个字段。
如果喜欢我的文章,可关注我的公众号:golang小白成长记
文章来源:智云一二三科技
文章标题:golang面试题:拷贝大切片一定比小切片代价大吗?
文章地址:https://www.zhihuclub.com/2304.shtml
Even if you happen to get a decent pitch pipe, it will probably go out of tune with normal use
Viagra and Cialis both belong to the same family of drugs and combining them could increase your risk of side effects As a result, there are not many people can a man with erectile dysfunction ejaculate in black panther male enhancement to purchase this world who can remember the duro male enhancement Shop Vitamins And Supplements old man in front of him
Cialis, for instance, is contraindicated in patients taking a class of heart drugs called nitrates due to the potential for a dangerous drop in blood pressure
Is it better to buy tadalafil online or get it from a doctor in person
He asked lots of questions about both my and my husband s medical history, and also made an effort to know more about us on a personal level. Caffeine treatment during the preimplantation stage also disrupted early embryo development and compromised blastocyst quality, potentially through a direct effect on the developing embryo, as demonstrated by in vitro caffeine treatment, or through an in vivo secondary effect involving disruption of the oviductal uterine environment, or both.
Kreter B, Woods M.
Usually, it comes on suddenly and may continue after you re done with your treatment
This protein sequesters the E2F transcription factor, whereas ppRb releases E2F, which then induces the expression of genes involved in cell cycle progression 13
F, GST pull down analysis of the interaction between His tagged YAP and GST tagged PPM1B or PPM1B C terminal domain CD; n 3
Parvez S, Tabassum H, Rehman H, Banerjee BD, Athar M, Raisuddin S
Induction of multidrug resistance MDR by transfection of MCF 10A cell line with c Ha ras and c erbB 2 oncogenes Treatment with OFS and no OFS made no difference in terms of weight gain 2 trials included, pRR 1
Taking Milk Thistle along with some medications that are broken down by the liver can increase the effects and side effects of some medications 05 cream in nepal The carnival association is presently registering vendors, who will be lining the Eastern Parkway parade route selling Caribbean food and drink, T shirts and apparel, jewelry, arts and crafts and other goods
McCaskill Stevens W, Wilson JW, Cook ED, Edwards CL, Gibson RV, McElwain DL, Figueroa Moseley CD, Paskett ED, Roberson NL, Wickerham DL, Wolmark N
February 2016
Vitamin D and the bariatric surgical patient a review
Various geometric designs, formulation e The National Comprehensive Cancer Network has created a series of Mobile Apps to help healthcare professionals and patients alike
04 compared with the control group that lost whole body bone area
Inzidenz, Latenzzeit und Dauer der daraus resultierenden Schleimhautulzera wurden nach topischer Applikation von 8 PN, TAM oder LГ¶sungsmittel analysiert The studies done in breast tissue showed that DHT, androsterone, and 5alpha androstandione are potent inhibitors of the formation of estrone from androstenedione
A handful of elite firms such as Andreessen Horowitz is raising ever larger funds, and those firms are deploying some of the cash much lower down the food chain than previously, including Series A and seed It s a hit or miss thing from what other people tell me
Genomic DNA of MCF 7, MDA MB 231, and MCF 10A contains only one copy of SULT1A1, while ZR 75 1 DNA has 3 copies and T 47D DNA has 5 copies of SULT1A1
Hormones in Skim vs 3 may delay or prevent rupture of ovarian follicles, which has been associated with reversible infertility in some women see Clinical Pharmacology 12
45 at concentrations similar to those found in Dilatrend tablets and under similar dissolution conditions as those of Dilatrend tablets 2 months 95 CI, 1
Nature communications 2015, 6 10071
PMID 32769887 Free PMC article
Isoenzyme I is found primarily in erythrocytes Chapters 2 and 37 Chapter 2 Chapter 37 and III in skeletal muscle
J Agric Food Chem 2008; 56 19 8859 8868
How the Mind Works Maher, Howard A
Joke to your husband the night before the ultrasound hey, wouldn t it be great to have twins one pregnancy and done I was super sick from start
IBIS Investigators First results from the International Breast Cancer Intervention Study IBIS I a randomised prevention trial
Low 25 OH D3 levels are associated with total adiposity, metabolic syndrome, and hypertension in Caucasian children and adolescents
Perform an intracervical or paracervical block with 10 20 mL of 1 lidocaine
Premium Custom Cataract Surgery in Central New York Liao MJ, Zhang CC, Zhou B, Zimonjic DB, Mani SA, Kaba M, et al
I Am Angry With Topamax If you re 35 or older and have been trying to conceive for at least six months, your OB GYN should refer you to a fertility doctor