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[dart/en] Updated example14 (#3881)
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@ -312,14 +312,14 @@ example14() {
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if (a) {
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print("true, a is $a");
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}
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a = null;
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a = false;
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if (a) {
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print("true, a is $a");
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} else {
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print("false, a is $a"); /// runs here
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}
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/// dynamic typed null can be convert to bool
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/// dynamic typed null can not be convert to bool
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var b; /// b is dynamic type
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b = "abc";
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try {
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@ -332,16 +332,16 @@ example14() {
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print("error, b is $b"); /// this could be run but got error
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}
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b = null;
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if (b) {
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if (b) { /// Failed assertion: boolean expression must not be null)
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print("true, b is $b");
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} else {
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print("false, b is $b"); /// runs here
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print("false, b is $b");
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}
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/// statically typed null can not be convert to bool
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var c = "abc";
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c = null;
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/// complie failed
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/// compilation failed
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/// if (c) {
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/// print("true, c is $c");
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/// } else {
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