perl怎么读
perl
abbr.principal exchange ratelinked (security) （证券）主要挂钩汇率; pupils equal and reactive to light 瞳孔等大并有光线反应;
以上结果来自金山词霸
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例句:
1.
To learn more about the history and development of Perl 5, visit the "Perl 5 isAlive" blog post.
www.reuters.com
2.
Perl developers pride themselves in saying that with Perl there is always morethan one way to do something.
www.reuters.com
3.
The Daniel Perl video and the Nick Berg videos were positively scarring.
clicked.nbcnews.com
4.
Trish Perl, director of epidemiology and infection prevention for the JohnsHopkins Health System.
www.chicagotribune.com
5.
"I can't tell you how important this has been to us,"
per怎么读
per读法为：美 /pər,pɜːr/ 英 /pər; pɜːr/常用词典：prep.每，每一；经；按照；（纹章）依……的方向adv.每，每个abbr.时期 (period)；人 (person)；每次，每个;照常，按惯例n.(Per) （挪、瑞、丹）佩尔（人名）adj.高的，过的，全的as per sth按照；依据following sth that has been decidedThe work was carried out as per instructions.工作是按指示进行的。as per normal/usual(informal) 照常；按惯例；一如既往in the way that is normal or usual; as often happensEveryone blamed me as per usual.大家照例是责怪我。双语例句：1、This paid lounge costs 50 yuan per person per hour.这家付费休息室每人每小时收费50元。2、Disposable income per capita has increased year by year recently.近几年的人均可支配收入逐年增长。3、You have to assemble the machine per the instructions.你必须按照说明书来组装这台机器。4、The ticket price is five dollars per person.票价是每人五美元5、The subscription is $20 per year.订阅包一年20美金。6、A premium subscription costs $40 per month.高级订阅包每月40美元。7、I dress up twice per year.我一年会盛装打扮两次。8、46 cents per stamp is a bad deal.46美分的邮票不合算。
Perl语言怎么样？发展前景怎么样？可以编什么？
Perl语言是由Larry Wall设计的文字分析报告语言，用于Unix环境下的编程.发展前景：目前还在用Perl语言开发大型网站的只有日美英，其中日本工作机会最多，可考虑移民。国内现在一般用PHO ，JAVA。perl作为一种高级语言，特别适合快速开发，尤其是快速原型开发，工具开发等。perl也许很多项目里面不会用到，但是如果你会用perl，那么你就比别人多了一把瑞士军刀，可以做一些意想不到的事情。Perl强项在于文本处理，或者作为各种程序之间的“胶水，它有着自动识别变量的特征，可以写动态网页，而且拥有大量的共享插件可以用。Perl是一个完整的编程语言，其他编程语言能做的事情他都能做（复杂程度可能有所不同）。在文本处理方面，生物信息学中用的很多很多。扩展资料：Perl编程小技巧 1、Perl超时机制 eval { my $tmpCmd="ping 192.168.0.1"; local $SIG{ALRM} = sub { alarm 0; die "TIMEOUT"; }; alarm(10); my $startCmdResult = qx($tmpCmd); alarm(0); }; if ($@ =~ /TIMEOUT/) { print "ping timeout";}2、忽略SIGCHLD信号,避免产生僵尸进程$SIG{CHLD} = 'IGNORE';3、等待sub show_flower{ local $| = 1; my @progress_symbol = ('-','\\','|','/'); my $n = 0; my $count=8; while($count--) { #print "\r$progress_symbol[$n]"; $n = ($n>=3)? 0:$n+1; select(undef, undef, undef, 0.1); } #print "\r"; local $| = 0;}4、 Perl多行注释单行注释：用#号多行注释：最常用的方法是使用 POD(Plain Old Documentations) 来进行多行注释。方法如下:=podcodes to comment=cut5、类似于unix shell中的“此处文档”语法#!/usr/bin/perl -w$P = 3.1415926;print <<EOF; the price is $P. Hello World.EOF6. Perl常量的用法use constant PI => ( 4* atan2(1,1) );PI=6; # Cannot modify PI; produces an error. use constant DEBUG => 1; print "Pi equals ", PI, "...\n" if DEBUG参考资料来源：百度百科-Perl语言
