| 1 |
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| 2 |
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| 3 | var UNDEF;
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| 4 |
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| 5 | /**
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| 6 | * Parses string and convert it into a native value.
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| 7 | */
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| 8 | function typecast(val) {
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| 9 | var r;
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| 10 | if ( val === null || val === 'null' ) {
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| 11 | r = null;
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| 12 | } else if ( val === 'true' ) {
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| 13 | r = true;
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| 14 | } else if ( val === 'false' ) {
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| 15 | r = false;
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| 16 | } else if ( val === UNDEF || val === 'undefined' ) {
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| 17 | r = UNDEF;
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| 18 | } else if ( val === '' || isNaN(val) ) {
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| 19 | //isNaN('') returns false
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| 20 | r = val;
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| 21 | } else {
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| 22 | //parseFloat(null || '') returns NaN
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| 23 | r = parseFloat(val);
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| 24 | }
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| 25 | return r;
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| 26 | }
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| 27 |
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| 28 | module.exports = typecast;
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| 29 |
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