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tmf / @doodle/i18n js
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Version:
5.0.0-rc.15 ▾
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<a href="../../../index.html">All files</a> / <a href="index.html">src/containers/I18NProvider</a> hash.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/**
* Generate a 32bit integer hash for a given string
* Sources:
* - http://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
* - https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript/8076436#8076436
* - https://gist.github.com/hyamamoto/fd435505d29ebfa3d9716fd2be8d42f0
* - https://en.wikipedia.org/wiki/Java_hashCode()
*/
export default str => {
let hash = <span class="cstat-no" title="statement not covered" >0;</span>
<span class="cstat-no" title="statement not covered" > if (str.length === 0) <span class="cstat-no" title="statement not covered" >r</span>eturn hash;</span>
<span class="cstat-no" title="statement not covered" > for (let i = 0; i < str.length; i += 1) {</span>
const char = <span class="cstat-no" title="statement not covered" >str.charCodeAt(i);</span>
// eslint-disable-next-line no-bitwise
<span class="cstat-no" title="statement not covered" > hash = (hash << 5) - hash + char;</span>
// eslint-disable-next-line no-bitwise
<span class="cstat-no" title="statement not covered" > hash &= hash; // Convert to 32bit integer</span>
}
<span class="cstat-no" title="statement not covered" > return hash;</span>
};
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