basic_lindex.tcl set colors {red green blue yellow} set first [lindex $colors 0] puts "The first color is $first" This creates a list of colors and retrieves the first element (index 0) using lindex. The result is stored in first and printed. ...
When first and last indices are the same, lrange returns a single element as a list. single_element.tcl set numbers {1 2 3 4 5 6 7 8 9} set middle [lrange $numbers 4 4] puts "The middle number is $middle" This extracts just the element at index 4 (the fifth element). The ...
Built for durability, precision, and survival, these timepieces are trusted by outdoor enthusiasts, military personnel, and first responders. Sign up to get the full list, plus our newsletter packed with the latest tech updates, curated gear guides, and exclusive deals. ...
表 6-1 数组操作命令表 命令格式 array exists arr array get arr ?pattern? array names arr ?pattern? array set arr list array size arr array startsearch arr array nextelement arr index array donesearch arr index parray arr 说明 判断 arr 是否为数组变量,是返回 1 返回一个包含交替出现索引,...
array exists命令用于测试变量是否作为数组存在,array get用于将数组转换成列表格式,array set用于将列表转换为数组,array names用于返回下标列表,array size用于返回对下标进行计数的结果。搜索整个数组有它自己的一组四个命令:array startseach、array anymore、array nextelement和array donesearch。
# my first program in Tcl 使用条件为0的if写入多行或块注释,; if 0 { my first program in Tcl program Its very simple } 3)行继续 \在行尾 % set a [list aa \ bb \ cc ] aa bb cc % set a aa bb cc 4)变量 使用字母、数字、下划线和$符号组成变量、函数名称; ...
Returns the index of the first element in list that matches pattern or -1 if none. The optional switch selects a pattern-matching technique (default : -glob). lsort ?-ascii? ?-integer? ?-real? ?-command command? ?-increasing? ?-decreasing? list Returns a new list formed by sorting ...
We read every piece of feedback, and take your input very seriously. Include my email address so I can be contacted Cancel Submit feedback Saved searches Use saved searches to filter your results more quickly Cancel Create saved search Sign in Sign up Reseting focus {...
在Tcl 中执行index、last、first、wordend和wordstart命令可以实现下标功能。字符串修改是由tolower、toupper、totitle、trim、trimleft、trimright、replace和map来处理的。后者需要预先定义一个字符映射表。用range抽取子字符串,用repeat多次输出字符串。 可以使用append命令,将文本添加到现有变量中。通过使用与 C 语言的...
setlength[llength$myList] putsListlength:$length #获取列表中的元素 setfirstElement[lindex$myList0] putsFirstelement:$firstElement 示例:字典 #定义一个字典 setmyDict{key1value1key2value2key3value3} puts$myDict #获取字典中的值 setvalue1[dictget$myDictkey1] ...