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5angel/chainable add

Last active June 6, 2016 12:38
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chainable add
function add(value) {
this.sum = this.sum || 0;
this.sum += value;
return add;
}
add.toString = () => this.sum;
console.log(add(2)(3) == 5); // true
console.log(add(2)(3) === 5); // false
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