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44 lines
1.2 KiB
Plaintext
Executable File
44 lines
1.2 KiB
Plaintext
Executable File
# Copyright 2012-2014 Institut National des Sciences Appliquées de Lyon (INSA-Lyon)
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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module DealingWithNull
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import java.util
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function main = |args| {
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# Data model
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let contacts = map[
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["mrbean", map[
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["email", "bean@gmail.com"],
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["url", "http://mrbean.com"]
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]],
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["larry", map[
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["email", "larry@iamricherthanyou.com"]
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]]
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]
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# MrBean and Larry
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let mrbean = contacts: get("mrbean")
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let larry = contacts: get("larry")
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# Illustrates orIfNull
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println(mrbean: get("url") orIfNull "n/a")
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println(larry: get("url") orIfNull "n/a")
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# Querying a non-existent data model because there is no 'address' entry
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println(mrbean: get("address")?: street()?: number() orIfNull "n/a")
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}
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