增加序列化JSON保留undefined的例子

ca6ff4f5 · L2m2 · 7270283c · ca6ff4f5
Commit ca6ff4f5 authored Sep 06, 2019 by L2m2
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stringify-keep-undefined-value.js src/stringify-keep-undefined-value.js +8 -0

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--- a/src/stringify-keep-undefined-value.js
+++ b/src/stringify-keep-undefined-value.js
+var obj = {
+  a: 1,
+  b: null,
+  c: undefined
+};
+print(JSON.stringify(obj, function(k, v){
+  return typeof v === 'undefined' ? null : v;
+}));
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