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2022-06-29
golang的for循环
本文章将记录学习go语言时相对其他语言不同的特性, 不出意外会持续更新空标识符 _ 的作用空标识符可用于在任何语法需要变量名但程序逻辑不需要的时候(如:在循环里)丢弃不需要的循环索引,并保留元素值fmt.Println("通过range遍历参数: ") for _, arg := range os.Args[0:]{ fmt.Printf(arg+"\n") } fmt.Println("保留索引的range遍历: ") for index, arg := range os.Args[0:]{ fmt.Printf("index: %d, arg: %s \n", index, arg) }自增或自减语句不能用于赋值, 如// 错误示例 j = i++这样是非法操作,不能编译通过;并且++ 和 -- 都必须放在变量后面, 因此 --i或++i 这样的操作也是非法的Go语言只有for循环这一种循环语句。没有while或者foreach的用法如果想实现类似while(1)的死循环,可以通过这种方式实现:// a traditional "while" loop for condition { // ... } // a traditional infinite loop for { // ... }终止死循环可以通过break或者return语句实现。
2022年06月29日
116 阅读
0 评论
0 点赞
2022-05-27
PHP短开标签
从PHP5.4开始支持短开标签假设已有变量 $str = 'Hello';使用正常方式输出:<?php echo $str; ?>使用短开标签方式输出<?= $str; ?>短开标签<?= 是echo的快捷用法
2022年05月27日
118 阅读
0 评论
0 点赞
2022-05-26
PHPExcel快速生成字母表
用于在字段很多的情况下自动生成列标识, 代码如下$count = 26 * 27; $l = 'A'; $arr = []; while ($count--){ $arr[] = $l; $l++; }这样$arr里面就是excel的列字母表了, 具体数据如下, 怎么用看业务需求吧:["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","AA","AB","AC","AD","AE","AF","AG","AH","AI","AJ","AK","AL","AM","AN","AO","AP","AQ","AR","AS","AT","AU","AV","AW","AX","AY","A Z","BA","BB","BC","BD","BE","BF","BG","BH","BI","BJ","BK","BL","BM","BN","BO","BP","BQ","BR","BS","BT","BU","BV","BW","BX","BY","BZ","CA","CB","CC","CD","CE","CF","CG","CH","CI","CJ","CK","CL","CM","CN","CO","CP","CQ","CR","CS","CT" ,"CU","CV","CW","CX","CY","CZ","DA","DB","DC","DD","DE","DF","DG","DH","DI","DJ","DK","DL","DM","DN","DO","DP","DQ","DR","DS","DT","DU","DV","DW","DX","DY","DZ","EA","EB","EC","ED","EE","EF","EG","EH","EI","EJ","EK","EL","EM","EN"," EO","EP","EQ","ER","ES","ET","EU","EV","EW","EX","EY","EZ","FA","FB","FC","FD","FE","FF","FG","FH","FI","FJ","FK","FL","FM","FN","FO","FP","FQ","FR","FS","FT","FU","FV","FW","FX","FY","FZ","GA","GB","GC","GD","GE","GF","GG","GH","GI ","GJ","GK","GL","GM","GN","GO","GP","GQ","GR","GS","GT","GU","GV","GW","GX","GY","GZ","HA","HB","HC","HD","HE","HF","HG","HH","HI","HJ","HK","HL","HM","HN","HO","HP","HQ","HR","HS","HT","HU","HV","HW","HX","HY","HZ","IA","IB","IC", "ID","IE","IF","IG","IH","II","IJ","IK","IL","IM","IN","IO","IP","IQ","IR","IS","IT","IU","IV","IW","IX","IY","IZ","JA","JB","JC","JD","JE","JF","JG","JH","JI","JJ","JK","JL","JM","JN","JO","JP","JQ","JR","JS","JT","JU","JV","JW","J X","JY","JZ","KA","KB","KC","KD","KE","KF","KG","KH","KI","KJ","KK","KL","KM","KN","KO","KP","KQ","KR","KS","KT","KU","KV","KW","KX","KY","KZ","LA","LB","LC","LD","LE","LF","LG","LH","LI","LJ","LK","LL","LM","LN","LO","LP","LQ","LR" ,"LS","LT","LU","LV","LW","LX","LY","LZ","MA","MB","MC","MD","ME","MF","MG","MH","MI","MJ","MK","ML","MM","MN","MO","MP","MQ","MR","MS","MT","MU","MV","MW","MX","MY","MZ","NA","NB","NC","ND","NE","NF","NG","NH","NI","NJ","NK","NL"," NM","NN","NO","NP","NQ","NR","NS","NT","NU","NV","NW","NX","NY","NZ","OA","OB","OC","OD","OE","OF","OG","OH","OI","OJ","OK","OL","OM","ON","OO","OP","OQ","OR","OS","OT","OU","OV","OW","OX","OY","OZ","PA","PB","PC","PD","PE","PF","PG ","PH","PI","PJ","PK","PL","PM","PN","PO","PP","PQ","PR","PS","PT","PU","PV","PW","PX","PY","PZ","QA","QB","QC","QD","QE","QF","QG","QH","QI","QJ","QK","QL","QM","QN","QO","QP","QQ","QR","QS","QT","QU","QV","QW","QX","QY","QZ","RA", "RB","RC","RD","RE","RF","RG","RH","RI","RJ","RK","RL","RM","RN","RO","RP","RQ","RR","RS","RT","RU","RV","RW","RX","RY","RZ","SA","SB","SC","SD","SE","SF","SG","SH","SI","SJ","SK","SL","SM","SN","SO","SP","SQ","SR","SS","ST","SU","S V","SW","SX","SY","SZ","TA","TB","TC","TD","TE","TF","TG","TH","TI","TJ","TK","TL","TM","TN","TO","TP","TQ","TR","TS","TT","TU","TV","TW","TX","TY","TZ","UA","UB","UC","UD","UE","UF","UG","UH","UI","UJ","UK","UL","UM","UN","UO","UP" ,"UQ","UR","US","UT","UU","UV","UW","UX","UY","UZ","VA","VB","VC","VD","VE","VF","VG","VH","VI","VJ","VK","VL","VM","VN","VO","VP","VQ","VR","VS","VT","VU","VV","VW","VX","VY","VZ","WA","WB","WC","WD","WE","WF","WG","WH","WI","WJ"," WK","WL","WM","WN","WO","WP","WQ","WR","WS","WT","WU","WV","WW","WX","WY","WZ","XA","XB","XC","XD","XE","XF","XG","XH","XI","XJ","XK","XL","XM","XN","XO","XP","XQ","XR","XS","XT","XU","XV","XW","XX","XY","XZ","YA","YB","YC","YD","YE ","YF","YG","YH","YI","YJ","YK","YL","YM","YN","YO","YP","YQ","YR","YS","YT","YU","YV","YW","YX","YY","YZ","ZA","ZB","ZC","ZD","ZE","ZF","ZG","ZH","ZI","ZJ","ZK","ZL","ZM","ZN","ZO","ZP","ZQ","ZR","ZS","ZT","ZU","ZV","ZW","ZX","ZY", "ZZ"]
2022年05月26日
197 阅读
0 评论
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2022-05-22
使用Mem Reduct定时清理内存
软件适合内存8g或以下的电脑软件描述Mem Reduct是一款轻量级的内存管理程序,它可以用来监控和清理系统内存。该程序使用了未记录的内部系统功能(Native API)来清除系统缓存(系统工作集,工作集,备用页面列表,修改后的页面列表),每次清理可释放10-50%的无用缓存。软件可以设置中文。Git地址:点我进入软件下载Github软件截图注意:为了正常工作,请赋予管理员权限
2022年05月22日
451 阅读
0 评论
0 点赞
2022-05-22
Windows网速监控悬浮窗
TrafficMonitor 是用于在Window系统上显示网速悬浮窗的软件,可以显示当前网速、CPU及内存利用率,支持嵌入到任务栏显示,支持更换皮肤、历史流量统计等功能。Github链接: https://github.com/zhongyang219/TrafficMonitor
2022年05月22日
142 阅读
0 评论
1 点赞
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