ubdate

node_modules/strnum/strnum.js

@@ -0,0 +1,50 @@
+const hexRegex = /^[-+]?0x[a-fA-F0-9]+$/;
+const numRegex = /^([\-\+])?(0*)(\.[0-9]+([eE]\-?[0-9]+)?|[0-9]+(\.[0-9]+([eE]\-?[0-9]+)?)?)$/;
+// const octRegex = /0x[a-z0-9]+/;
+// const binRegex = /0x[a-z0-9]+/;
+
+const consider = {
+    hex :  true,
+    leadingZeros: true,
+    decimalPoint: "\.",
+    //skipLike: /regex/
+};
+
+function toNumber(str, options = {}){
+    // const options = Object.assign({}, consider);
+    // if(opt.leadingZeros === false){
+    //     options.leadingZeros = false;
+    // }else if(opt.hex === false){
+    //     options.hex = false;
+    // }
+
+    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 (options.hex && hexRegex.test(trimmedStr)) {
+        return Number.parseInt(trimmedStr, 16);
+    // } else if (options.parseOct && octRegex.test(str)) {
+    //     return Number.parseInt(val, 8);
+    // }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);
+        if(match){
+            const negative = match[1];
+            const leadingZeros = match[2];
+            const num = match[3]; //complete num
+            const eNotation = match[4] || match[6];
+            if(leadingZeros.length === 1 && num[0] === ".") return Number(str);
+            else if(!options.leadingZeros && leadingZeros.length > 0) return str;
+            else return Number(trimmedStr);
+        }else{ //non-numeric string
+            return str;
+        }
+    }
+}
+
+module.exports = toNumber