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| 1 <!DOCTYPE html> | 1 <!DOCTYPE html> |
| 2 <!-- | 2 <!-- |
| 3 Copyright (c) 2014 The Chromium Authors. All rights reserved. | 3 Copyright (c) 2014 The Chromium Authors. All rights reserved. |
| 4 Use of this source code is governed by a BSD-style license that can be | 4 Use of this source code is governed by a BSD-style license that can be |
| 5 found in the LICENSE file. | 5 found in the LICENSE file. |
| 6 --> | 6 --> |
| 7 | 7 |
| 8 <link rel="import" href="/tracing/base/base.html"> | 8 <link rel="import" href="/tracing/base/base.html"> |
| 9 | 9 |
| 10 <script> | 10 <script> |
| (...skipping 251 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 262 * element and returns a value that is coerced to a boolean. Defaults to | 262 * element and returns a value that is coerced to a boolean. Defaults to |
| 263 * the identity function. | 263 * the identity function. |
| 264 * @param {*=} opt_this Optional 'this' context for opt_func. | 264 * @param {*=} opt_this Optional 'this' context for opt_func. |
| 265 */ | 265 */ |
| 266 function findFirstInArray(ary, opt_func, opt_this) { | 266 function findFirstInArray(ary, opt_func, opt_this) { |
| 267 const i = findFirstIndexInArray(ary, opt_func, opt_func); | 267 const i = findFirstIndexInArray(ary, opt_func, opt_func); |
| 268 if (i === -1) return undefined; | 268 if (i === -1) return undefined; |
| 269 return ary[i]; | 269 return ary[i]; |
| 270 } | 270 } |
| 271 | 271 |
| 272 /** | |
| 273 * Returns the key of the first dictionary entry for which |opt_func| returns | |
| 274 * a truthy value. | |
| 275 * | |
| 276 * @param {!Object} dict The dictionary being searched. | |
| 277 * @param {function(*, *): *=} opt_func The test function which accepts a | |
| 278 * dictionary key as its first parameter, the corresponding dictionary | |
| 279 * value as its second parameter, and returns a value that is coerced to a | |
| 280 * boolean. Defaults to the identity function (which returns the key). | |
| 281 * @param {*=} opt_this Optional 'this' context for opt_func. | |
| 282 */ | |
| 283 function findFirstKeyInDictMatching(dict, opt_func, opt_this) { | |
| 284 const func = opt_func || (x => x); | |
| 285 for (const key in dict) { | |
| 286 if (func.call(opt_this, key, dict[key])) { | |
| 287 return key; | |
| 288 } | |
| 289 } | |
| 290 return undefined; | |
| 291 } | |
| 292 | |
| 293 /** Returns the values in an ES6 Map object. */ | 272 /** Returns the values in an ES6 Map object. */ |
| 294 function mapValues(map) { | 273 function mapValues(map) { |
| 295 const values = []; | 274 const values = []; |
| 296 for (const value of map.values()) { | 275 for (const value of map.values()) { |
| 297 values.push(value); | 276 values.push(value); |
| 298 } | 277 } |
| 299 return values; | 278 return values; |
| 300 } | 279 } |
| 301 | 280 |
| 302 function setsEqual(a, b) { | 281 function setsEqual(a, b) { |
| (...skipping 13 matching lines...) Expand all Loading... |
| 316 getOnlyElement, | 295 getOnlyElement, |
| 317 getFirstElement, | 296 getFirstElement, |
| 318 groupIntoMap, | 297 groupIntoMap, |
| 319 mapItems, | 298 mapItems, |
| 320 filterItems, | 299 filterItems, |
| 321 inPlaceFilter, | 300 inPlaceFilter, |
| 322 invertArrayOfDicts, | 301 invertArrayOfDicts, |
| 323 arrayToDict, | 302 arrayToDict, |
| 324 findFirstIndexInArray, | 303 findFirstIndexInArray, |
| 325 findFirstInArray, | 304 findFirstInArray, |
| 326 findFirstKeyInDictMatching, | |
| 327 mapValues, | 305 mapValues, |
| 328 setsEqual, | 306 setsEqual, |
| 329 }; | 307 }; |
| 330 }); | 308 }); |
| 331 </script> | 309 </script> |
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Chromium Code Reviews
Issue 2959713003:
Remove tr.b.findFirstKeyInDictMatching. (Closed)
