Created
March 28, 2019 09:40
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static parseBoolean(str: any): boolean { | |
if (str === true) { | |
return true; | |
} | |
if (str === false) { | |
return false; | |
} | |
if (str === 1) { | |
return true; | |
} | |
if (str === 0) { | |
return false; | |
} | |
if (str === 'true') { | |
return true; | |
} | |
if (!str) { | |
return false; | |
} | |
switch (str.length) { | |
case 1: { | |
const ch0 = str.charAt(0); | |
if (ch0 === 'y' || ch0 === 'Y' || | |
ch0 === 't' || ch0 === 'T' || | |
ch0 === '1') { | |
return true; | |
} | |
if (ch0 === 'n' || ch0 === 'N' || | |
ch0 === 'f' || ch0 === 'F' || | |
ch0 === '0') { | |
return false; | |
} | |
break; | |
} | |
case 2: { | |
const ch0 = str.charAt(0); | |
const ch1 = str.charAt(1); | |
if ((ch0 === 'o' || ch0 === 'O') && | |
(ch1 === 'n' || ch1 === 'N') ) { | |
return true; | |
} | |
if ((ch0 === 'n' || ch0 === 'N') && | |
(ch1 === 'o' || ch1 === 'O') ) { | |
return false; | |
} | |
break; | |
} | |
case 3: { | |
const ch0 = str.charAt(0); | |
const ch1 = str.charAt(1); | |
const ch2 = str.charAt(2); | |
if ((ch0 === 'y' || ch0 === 'Y') && | |
(ch1 === 'e' || ch1 === 'E') && | |
(ch2 === 's' || ch2 === 'S') ) { | |
return true; | |
} | |
if ((ch0 === 'o' || ch0 === 'O') && | |
(ch1 === 'f' || ch1 === 'F') && | |
(ch2 === 'f' || ch2 === 'F') ) { | |
return false; | |
} | |
break; | |
} | |
case 4: { | |
const ch0 = str.charAt(0); | |
const ch1 = str.charAt(1); | |
const ch2 = str.charAt(2); | |
const ch3 = str.charAt(3); | |
if ((ch0 === 't' || ch0 === 'T') && | |
(ch1 === 'r' || ch1 === 'R') && | |
(ch2 === 'u' || ch2 === 'U') && | |
(ch3 === 'e' || ch3 === 'E') ) { | |
return true; | |
} | |
break; | |
} | |
case 5: { | |
const ch0 = str.charAt(0); | |
const ch1 = str.charAt(1); | |
const ch2 = str.charAt(2); | |
const ch3 = str.charAt(3); | |
const ch4 = str.charAt(4); | |
if ((ch0 === 'f' || ch0 === 'F') && | |
(ch1 === 'a' || ch1 === 'A') && | |
(ch2 === 'l' || ch2 === 'L') && | |
(ch3 === 's' || ch3 === 'S') && | |
(ch4 === 'e' || ch4 === 'E') ) { | |
return false; | |
} | |
break; | |
} | |
default: | |
break; | |
} | |
return false; | |
} |
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