comparison: docs/Writerside/topics/map.h.md
docs/Writerside/topics/map.h.md
- changeset 1298
- 0597f1f20ea9
- parent 1274
- 03e9360e98f5
- child 1318
- 12fa1d37fe48
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| 1297:0811fb9a8dba | 1298:0597f1f20ea9 |
|---|---|
| 65 // Iterate through the contact list | 65 // Iterate through the contact list |
| 66 CxMapIterator iter = cxMapIterator(contacts); | 66 CxMapIterator iter = cxMapIterator(contacts); |
| 67 cx_foreach(CxMapEntry *, entry, iter) { | 67 cx_foreach(CxMapEntry *, entry, iter) { |
| 68 cxstring name = cx_strn(entry->key->data, entry->key->len); | 68 cxstring name = cx_strn(entry->key->data, entry->key->len); |
| 69 const char *phone = entry->value; | 69 const char *phone = entry->value; |
| 70 printf("%.*s: %s\n", (int) name.length, name.ptr, phone); | 70 printf("%" CX_PRIstr ": %s\n", CX_SFMT(name), phone); |
| 71 } | 71 } |
| 72 | 72 |
| 73 cxMapFree(contacts); | 73 cxMapFree(contacts); |
| 74 | 74 |
| 75 return 0; | 75 return 0; |
| 80 | 80 |
| 81 In the first part we add several entries to the map. | 81 In the first part we add several entries to the map. |
| 82 Then the example shows retrieval, updating, and removal of information. | 82 Then the example shows retrieval, updating, and removal of information. |
| 83 The last part shows how to iterate over the pairs of the map and how to recover the string from the key. | 83 The last part shows how to iterate over the pairs of the map and how to recover the string from the key. |
| 84 | 84 |
| 85 In real world situations, however, it is quite unlikely that you will use a map to store string literals. | 85 In real-world situations, however, it is quite unlikely that you will use a map to store string literals. |
| 86 The next example shows a more realistic program, where it is necessary to store strings based on user input. | 86 The next example shows a more realistic program, where it is necessary to store strings based on user input. |
| 87 | 87 |
| 88 ```C | 88 ```C |
| 89 #include <stdio.h> | 89 #include <stdio.h> |
| 90 #include <string.h> | 90 #include <string.h> |
| 140 input[strcspn(input, "\n")] = '\0'; | 140 input[strcspn(input, "\n")] = '\0'; |
| 141 cxmutstr *phone = cxMapGet(contacts, input); | 141 cxmutstr *phone = cxMapGet(contacts, input); |
| 142 if (phone == NULL) { | 142 if (phone == NULL) { |
| 143 puts("No record."); | 143 puts("No record."); |
| 144 } else { | 144 } else { |
| 145 printf("Result: %.*s\n", | 145 printf("Result: %" CX_PRIstr "\n", |
| 146 (int) phone->length, phone->ptr); | 146 CX_SFMT(*phone)); |
| 147 } | 147 } |
| 148 } | 148 } |
| 149 } else if (input[0] == '3') { | 149 } else if (input[0] == '3') { |
| 150 fputs("Name > ", stdout); | 150 fputs("Name > ", stdout); |
| 151 if (fgets(input, buffer_size, stdin)) { | 151 if (fgets(input, buffer_size, stdin)) { |
| 165 cx_foreach(CxMapEntry *, entry, iter) { | 165 cx_foreach(CxMapEntry *, entry, iter) { |
| 166 cxstring name = cx_strn(entry->key->data, | 166 cxstring name = cx_strn(entry->key->data, |
| 167 entry->key->len); | 167 entry->key->len); |
| 168 // ... except that here we get cxmutstr* | 168 // ... except that here we get cxmutstr* |
| 169 cxmutstr *phone = entry->value; | 169 cxmutstr *phone = entry->value; |
| 170 printf("%.*s: %.*s\n", | 170 printf("%" CX_PRIstr ": %" CX_PRIstr "\n", |
| 171 (int) name.length, name.ptr, | 171 CX_SFMT(name), CX_SFMT(*phone)); |
| 172 (int) phone->length, phone->ptr); | |
| 173 } | 172 } |
| 174 } else if (input[0] == '0') { | 173 } else if (input[0] == '0') { |
| 175 running = false; | 174 running = false; |
| 176 } else { | 175 } else { |
| 177 puts("Please select a menu item.\n"); | 176 puts("Please select a menu item.\n"); |
