17 lines
850 B
JavaScript
17 lines
850 B
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.first = void 0;
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var EmptyError_1 = require("../util/EmptyError");
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var filter_1 = require("./filter");
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var take_1 = require("./take");
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var defaultIfEmpty_1 = require("./defaultIfEmpty");
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var throwIfEmpty_1 = require("./throwIfEmpty");
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var identity_1 = require("../util/identity");
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function first(predicate, defaultValue) {
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var hasDefaultValue = arguments.length >= 2;
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return function (source) {
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return source.pipe(predicate ? filter_1.filter(function (v, i) { return predicate(v, i, source); }) : identity_1.identity, take_1.take(1), hasDefaultValue ? defaultIfEmpty_1.defaultIfEmpty(defaultValue) : throwIfEmpty_1.throwIfEmpty(function () { return new EmptyError_1.EmptyError(); }));
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};
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}
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exports.first = first;
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//# sourceMappingURL=first.js.map
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