Objective-C

Demonstrate the XML I, J, and K Properties

See more XML Examples

Demonstrates the XML I, J, and K properties. These properties can be used in paths to access the I'th, J'th, or K'th child in a path. Three indexing properties are provided to allow for triple-nested loops using this feature.

Note: This example requires Chilkat v9.5.0.64 or later.

Objective-C

#import <CkoXml.h>
#import <CkoStringBuilder.h>

// Note: This example requires Chilkat v9.5.0.64 or later.

CkoXml *xml = [[CkoXml alloc] init];

xml.Tag = @"tripleNested";

int i = 0;
int j = 0;
int k = 0;

CkoStringBuilder *sbValue = [[CkoStringBuilder alloc] init];
BOOL bAutoCreate = YES;

while (i < 3) {
    xml.I = [NSNumber numberWithInt: i];
    j = 0;
    while (j < 4) {
        xml.J = [NSNumber numberWithInt: j];
        k = 0;
        while (k < 2) {
            xml.K = [NSNumber numberWithInt: k];

            int n = i * 100 + j * 10 + k;
            [sbValue Clear];
            [sbValue AppendInt: [NSNumber numberWithInt: n]];

            [xml UpdateAt: @"a[i]|b[j]|c[k]" autoCreate: bAutoCreate value: [sbValue GetAsString]];
            k = k + 1;
        }

        j = j + 1;
    }

    i = i + 1;
}

NSLog(@"%@",[xml GetXml]);

// This is the XML
// See below for code showing how to parse it..

// 	<?xml version="1.0" encoding="utf-8" ?>
// 	<tripleNested>
// 	    <a>
// 	        <b>
// 	            <c>0</c>
// 	            <c>1</c>
// 	        </b>
// 	        <b>
// 	            <c>10</c>
// 	            <c>11</c>
// 	        </b>
// 	        <b>
// 	            <c>20</c>
// 	            <c>21</c>
// 	        </b>
// 	        <b>
// 	            <c>30</c>
// 	            <c>31</c>
// 	        </b>
// 	    </a>
// 	    <a>
// 	        <b>
// 	            <c>100</c>
// 	            <c>101</c>
// 	        </b>
// 	        <b>
// 	            <c>110</c>
// 	            <c>111</c>
// 	        </b>
// 	        <b>
// 	            <c>120</c>
// 	            <c>121</c>
// 	        </b>
// 	        <b>
// 	            <c>130</c>
// 	            <c>131</c>
// 	        </b>
// 	    </a>
// 	    <a>
// 	        <b>
// 	            <c>200</c>
// 	            <c>201</c>
// 	        </b>
// 	        <b>
// 	            <c>210</c>
// 	            <c>211</c>
// 	        </b>
// 	        <b>
// 	            <c>220</c>
// 	            <c>221</c>
// 	        </b>
// 	        <b>
// 	            <c>230</c>
// 	            <c>231</c>
// 	        </b>
// 	    </a>
// 	</tripleNested>
// 

// Parse the XML, without needing to know the number of children.
// That can be discovered with the NumChildrenAt method.

i = 0;
int aCount = [xml.NumChildren intValue];
while (i < aCount) {
    xml.I = [NSNumber numberWithInt: i];
    j = 0;
    int bCount = [[xml NumChildrenAt: @"a[i]"] intValue];
    while (j < bCount) {
        xml.J = [NSNumber numberWithInt: j];
        k = 0;
        int cCount = [[xml NumChildrenAt: @"a[i]|b[j]"] intValue];
        while (k < cCount) {
            xml.K = [NSNumber numberWithInt: k];
            NSLog(@"%d%@%d%@%d%@%d",i,@", ",j,@", ",k,@": ",[[xml GetChildIntValue: @"a[i]|b[j]|c[k]"] intValue]);
            k = k + 1;
        }

        j = j + 1;
    }

    i = i + 1;
}

// Output:

// 	0, 0, 0: 0
// 	0, 0, 1: 1
// 	0, 1, 0: 10
// 	0, 1, 1: 11
// 	0, 2, 0: 20
// 	0, 2, 1: 21
// 	0, 3, 0: 30
// 	0, 3, 1: 31
// 	1, 0, 0: 100
// 	1, 0, 1: 101
// 	1, 1, 0: 110
// 	1, 1, 1: 111
// 	1, 2, 0: 120
// 	1, 2, 1: 121
// 	1, 3, 0: 130
// 	1, 3, 1: 131
// 	2, 0, 0: 200
// 	2, 0, 1: 201
// 	2, 1, 0: 210
// 	2, 1, 1: 211
// 	2, 2, 0: 220
// 	2, 2, 1: 221
// 	2, 3, 0: 230
// 	2, 3, 1: 231
//