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One of the consequences concerns the Hash type: FreeMarker can be used to create a Hash object literally but, once it is created, the object cannot be changed (click here for more details).
Example:
| Pas de format |
|---|
<#assign hashVal = {"attr1": "val1",
"attr2": "val2",
"attr3": "val3"} /><#list>
<#list hashVal as aKey, aVal>...</#list>$#list>
${hashVal["attr2"]}
<#-- It is possible to browse the hashVal values or access a hashVal attribute value but it is not easy to change a hashVal attribute value or add/delete an attribute --><#>
<#-- Inefficient solution for changing an attribute value --><#assign>
<#assign attrModified = "attr2" /><#assign>
<#assign hashVal = hashVal + { attrModified : "val2Modified" }/><#>
<#-- Inefficient solution for deleting an attribute --><#assign>
<#assign hashVal = {"attr1": "val1",
"attr2": "val2",
"attr3": "val3"} /><#assign>
<#assign attrToDelete = "attr2" , tmpHash = {} /><#list>
<#list hashVal as key, val><#ifval>
<#if key != attrToDelete><#assignattrToDelete>
<#assign tmpHash = tmpHash + {key: val} /></#if></#list><#assign>
</#if>
</#list>
<#assign hashVal = tmpHash /> |
This function returns a Hash-type object with basic add, change and delete methods. It can take an argument:
- Either no parameter: the returned Hash object is empty,
- Or a Hash object: the returned Hash object is a copy. These attributes/values are identical to the Hash object passed as a parameter,
- a String-type key and a value of any type: the returned Hash type will contain a single attribute, the name of which is the value of the key passed as a parameter and the associated value of which is that passed as a parameter.
Parameters
| Hardis - Tableau personnalisé | ||||||||
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For example
| Pas de format |
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<#-- Create empty hash --><#assign> <#assign newHash = hardisCore.createSimpleHash() />Size> Size of newHash:${newSeq?keys?size} <#-- Create Hash from another Hash --><#assign> <#assign originalHash = {"attr1": 1, "attr2":true} /><#assign> <#assign newHash = hardisCore.createSimpleHash(originalHash) />Size> Size of newHash:${newSeq?keys?size} <#-- Create Hash with one sub variable --><#assign> <#assign newHash = hardisCore.createSimpleHash("myKey", "myValue") />Size> Size of newHash:${newSeq?keys?size} |
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