Adobe 38043740 Developing Applications - Page 125

DEVELOPING COLDFUSION 9 APPLICATIONS 120 The CFML Programming Language • The break statement exits the current loop or case statement. Using continue The continue statement ends the current loop iteration, skips any code following it in the loop, and jumps to the beginning of the next loop iteration. For example, the following code loops through an array and display's each value that is not an empty string: for ( loop=1; loop LE 10; loop = loop+1) { if(a[loop] EQ "") continue; WriteOutput(loop); } (To test this code snippet, you must first create an array, a, with 10 or more elements, some of which are not empty strings.) The continue statement is useful if you loop over arrays or structures and you want to skip processing for array elements or structure members with specific values, such as the empty string. Using break The break statement exits the current loop or case statement. Processing continues at the next CFScript statement. You end case statement processing blocks with a break statement. You can also use a test case with a break statement to prevent infinite loops, as shown in the following example. This script loops through an array and prints the array indexes that contain the value key. It uses a conditional test and a break statement to make sure that the loop ends when at the end of the array. strings=ArrayNew(1); ArraySet(strings, 1, 10, "lock"); strings[5]="key"; strings[9]="key"; indx=0; for( ; ; ) { indx=indx+1; if(Find("key",strings[indx],1)) { WriteOutput("Found a key at " & indx & "."); } else if (indx IS ArrayLen(strings)) { WriteOutput("Array ends at index " & indx & "."); break; } } for-in construct (for arrays) Note: This feature applies only if you have installed ColdFusion 9 Update 1. You can loop over arrays in CFScript using for-in construct. Last updated 1/20/2012