Java中for的几种常见形式 For loop using index...public void remove() { //... } }; } } 普通for遍历和增强for的一些区别...增强的for循环的底层使用迭代器来实现,所以它就与普通for循环有一些差异增强for使用增强for循环的时候不能使用集合删除集合中的元素;增强for循环不能使用迭代器中的方法,例如...
In this example, we have two arrays:fruitsandcolors. We use a ‘for’ loop to iterate through the indices of thefruitsarray (obtained using the!symbol before the array variable). For each iteration, we print out a sentence that combines elements from both arrays at the same index. Loops ...
array_name=(value0 value1 value2 value3) 也可以单独定义数组的各个分量,可以不使用连续的下标,而且下标的范围没有限制。如: array_name[0]=value0 array_name[1]=value1 array_name[2]=value2 读取数组: 读取某个下标的元素一般格式为: ${array_name[index]} 读取数组的全部元素,用@或* ${array_nam...
$ declare -A array $ for subscript in a b c d e > do > array[$subscript]="$subscript $RANDOM" > done $ printf ":%s:\n" "${array["c"]}" ## print one element :c 1574: $ printf ":%s:\n" "${array[@]}" ## print the entire array :a 13856: :b 6235: :c 1574: :d...
var = 42# Spaces around = in assignments$foo=42# $ in assignmentsfor$varin*;do...# $ in for loop variablesvar$n="Hello"# Wrong indirect assignmentecho${var$n}# Wrong indirect referencevar=(1, 2, 3)# Comma separated arraysarray=( [index] = value )# Incorrect index initializationech...
Notice that the first element has anindexof 0. You can get any of the elements this way, for example the fourth element: echo${plagues[3]} ## flies To get all of the elements ofplaguesuse a star (*) between the square brackets: ...
# save strnu}next}{for(iincnames){# loop through array indices cname=cnames[i]# make c...
The support for Bash Arrays simplifies heavily how you can write your shell scripts to support more complex logic or to safely preserve field separation. This guide covers the standard bash array operations and how to declare (set), append, iterate over (loop), check (test), access (get),...
length=${#numbers_array[@]}– evaluates the numbers of elements in thenumbers_arrayarray for ((i=$length-1; i>=0; i–))– theforloop iterates through thenumbers_arraystarting from the last index ($length-1) to the first index (0) ...
19 # 在for循环中20 echo -n "Values of \"a\" in the loop are: "21 for a in 7 8 9 1122 do23 echo -n "$a "24 done25 26 echo27 echo28 29 # 在read命令状态中30 echo -n "Enter \"a\" "31 read a32 echo "The value of \"a\" is now $a."...