wallet-core/node_modules/has-flag/index.js

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'use strict';
module.exports = function (flag, argv) {
argv = argv || process.argv;
var terminatorPos = argv.indexOf('--');
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var prefix = /^-{1,2}/.test(flag) ? '' : '--';
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var pos = argv.indexOf(prefix + flag);
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return pos !== -1 && (terminatorPos === -1 ? true : pos < terminatorPos);
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};