builderman verion 0.1.0, initial commit/release.

node_modules/strnum/strnum.js

@@ -0,0 +1,129 @@
+const hexRegex = /^[-+]?0x[a-fA-F0-9]+$/;
+const numRegex = /^([\-\+])?(0*)([0-9]*(\.[0-9]*)?)$/;
+// const octRegex = /^0x[a-z0-9]+/;
+// const binRegex = /0x[a-z0-9]+/;
+
+ 
+const consider = {
+    hex :  true,
+    // oct: false,
+    leadingZeros: true,
+    decimalPoint: "\.",
+    eNotation: true,
+    //skipLike: /regex/
+};
+
+export default function toNumber(str, options = {}){
+    options = Object.assign({}, consider, options );
+    if(!str || typeof str !== "string" ) return str;
+    
+    let trimmedStr  = str.trim();
+    
+    if(options.skipLike !== undefined && options.skipLike.test(trimmedStr)) return str;
+    else if(str==="0") return 0;
+    else if (options.hex && hexRegex.test(trimmedStr)) {
+        return parse_int(trimmedStr, 16);
+    // }else if (options.oct && octRegex.test(str)) {
+    //     return Number.parseInt(val, 8);
+    }else if (trimmedStr.search(/.+[eE].+/)!== -1) { //eNotation
+        return resolveEnotation(str,trimmedStr,options);
+    // }else if (options.parseBin && binRegex.test(str)) {
+    //     return Number.parseInt(val, 2);
+    }else{
+        //separate negative sign, leading zeros, and rest number
+        const match = numRegex.exec(trimmedStr);
+        // +00.123 => [ , '+', '00', '.123', ..
+        if(match){
+            const sign = match[1] || "";
+            const leadingZeros = match[2];
+            let numTrimmedByZeros = trimZeros(match[3]); //complete num without leading zeros
+            const decimalAdjacentToLeadingZeros = sign ? // 0., -00., 000.
+                str[leadingZeros.length+1] === "." 
+                : str[leadingZeros.length] === ".";
+
+            //trim ending zeros for floating number
+            if(!options.leadingZeros //leading zeros are not allowed
+                && (leadingZeros.length > 1 
+                    || (leadingZeros.length === 1 && !decimalAdjacentToLeadingZeros))){
+                // 00, 00.3, +03.24, 03, 03.24
+                return str;
+            }
+            else{//no leading zeros or leading zeros are allowed
+                const num = Number(trimmedStr);
+                const parsedStr = String(num);
+
+                if( num === 0) return num;
+                if(parsedStr.search(/[eE]/) !== -1){ //given number is long and parsed to eNotation
+                    if(options.eNotation) return num;
+                    else return str;
+                }else if(trimmedStr.indexOf(".") !== -1){ //floating number
+                    if(parsedStr === "0") return num; //0.0
+                    else if(parsedStr === numTrimmedByZeros) return num; //0.456. 0.79000
+                    else if( parsedStr === `${sign}${numTrimmedByZeros}`) return num;
+                    else return str;
+                }
+                
+                let n = leadingZeros? numTrimmedByZeros : trimmedStr;
+                if(leadingZeros){
+                    // -009 => -9
+                    return (n === parsedStr) || (sign+n === parsedStr) ? num : str
+                }else  {
+                    // +9
+                    return (n === parsedStr) || (n === sign+parsedStr) ? num : str
+                }
+            }
+        }else{ //non-numeric string
+            return str;
+        }
+    }
+}
+
+const eNotationRegx = /^([-+])?(0*)(\d*(\.\d*)?[eE][-\+]?\d+)$/;
+function resolveEnotation(str,trimmedStr,options){
+    if(!options.eNotation) return str;
+    const notation = trimmedStr.match(eNotationRegx); 
+    if(notation){
+        let sign = notation[1] || "";
+        const eChar = notation[3].indexOf("e") === -1 ? "E" : "e";
+        const leadingZeros = notation[2];
+        const eAdjacentToLeadingZeros = sign ? // 0E.
+            str[leadingZeros.length+1] === eChar 
+            : str[leadingZeros.length] === eChar;
+
+        if(leadingZeros.length > 1 && eAdjacentToLeadingZeros) return str;
+        else if(leadingZeros.length === 1 
+            && (notation[3].startsWith(`.${eChar}`) || notation[3][0] === eChar)){
+                return Number(trimmedStr);
+        }else if(options.leadingZeros && !eAdjacentToLeadingZeros){ //accept with leading zeros
+            //remove leading 0s
+            trimmedStr = (notation[1] || "") + notation[3];
+            return Number(trimmedStr);
+        }else return str;
+    }else{
+        return str;
+    }
+}
+
+/**
+ * 
+ * @param {string} numStr without leading zeros
+ * @returns 
+ */
+function trimZeros(numStr){
+    if(numStr && numStr.indexOf(".") !== -1){//float
+        numStr = numStr.replace(/0+$/, ""); //remove ending zeros
+        if(numStr === ".")  numStr = "0";
+        else if(numStr[0] === ".")  numStr = "0"+numStr;
+        else if(numStr[numStr.length-1] === ".")  numStr = numStr.substring(0,numStr.length-1);
+        return numStr;
+    }
+    return numStr;
+}
+
+function parse_int(numStr, base){
+    //polyfill
+    if(parseInt) return parseInt(numStr, base);
+    else if(Number.parseInt) return Number.parseInt(numStr, base);
+    else if(window && window.parseInt) return window.parseInt(numStr, base);
+    else throw new Error("parseInt, Number.parseInt, window.parseInt are not supported")
+}