Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | /**
* @license Apache-2.0
*
* Copyright (c) 2022 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var isFunction = require( '@stdlib/assert/is-function' );
var isNonNegativeInteger = require( '@stdlib/assert/is-nonnegative-integer' ).isPrimitive;
var format = require( '@stdlib/string/format' );
// FUNCTIONS //
/**
* Applies provided arguments to a function and passes the result to another function.
*
* @private
* @param {Function} fcn - function
* @param {Array} args - function arguments
* @param {Function} after - function to invoke with the result of `fcn`
* @param {*} thisArg - evaluation context for `after`
* @returns {*} result
*/
function apply( fcn, args, after, thisArg ) {
var r1 = fcn.apply( null, args );
var r2 = after.call( thisArg, r1 );
return ( r2 === void 0 ) ? r1 : r2;
}
// MAIN //
/**
* Decorates a provided function such that the function's return value is provided as an argument to another function.
*
* @param {Function} fcn - function to decorate
* @param {NonNegativeInteger} arity - number of parameters
* @param {Function} after - function to invoke with the result of the decorated function
* @param {*} [thisArg] - evaluation context for `after`
* @throws {TypeError} first argument must be a function
* @throws {TypeError} second argument must be a nonnegative integer
* @throws {TypeError} third argument must be a function
* @returns {Function} decorator
*
* @example
* var abs = require( '@stdlib/math/base/special/abs' );
*
* function negate( v ) {
* return -v;
* }
*
* var f = decorateAfter( abs, 1, negate );
* // returns <Function>
*
* var v = f( -5 );
* // returns -5
*
* v = f( 5 );
* // returns -5
*
* @example
* var abs = require( '@stdlib/math/base/special/abs' );
*
* function log( v ) {
* console.log( v );
* }
*
* var f = decorateAfter( abs, 1, log );
* // returns <Function>
*
* var v = f( -5 );
* // returns 5
*
* v = f( 5 );
* // returns 5
*
* @example
* var abs = require( '@stdlib/math/base/special/abs' );
*
* function counter() {
* this.count += 1;
* }
*
* var ctx = {
* 'count': 0
* };
*
* var f = decorateAfter( abs, 1, counter, ctx );
* // returns <Function>
*
* var v = f( -5 );
* // returns 5
*
* v = f( 5 );
* // returns 5
*
* var count = ctx.count;
* // returns 2
*/
function decorateAfter( fcn, arity, after, thisArg ) {
var fcns;
var f;
if ( !isFunction( fcn ) ) {
throw new TypeError( format( 'invalid argument. First argument must be a function. Value: `%s`.', fcn ) );
}
if ( !isFunction( after ) ) {
throw new TypeError( format( 'invalid argument. Third argument must be a function. Value: `%s`.', after ) );
}
// NOTE: we select a specific signature so that `fcn.length` is preserved, thus matching the definition of a "decorator" where the decorator function should be transparent to external clients (i.e., have a matching signature). While more recent JavaScript environments allow `Function.prototype.length` to be configurable, older environments do not and error when attempting to manually specify the value for a function's length. We cap support for matching signature length as signatures with many parameters are likely to be exceedingly rare, especially when used in conjunction with this API...
fcns = [ fN, f1, f2, f3, f4, f5, f6, f7, f8, f9, f10 ];
if ( !isNonNegativeInteger( arity ) ) {
throw new TypeError( format( 'invalid argument. Second argument must be a nonnegative integer. Value: `%s`.', arity ) );
}
if ( arity < fcns.length ) {
f = fcns[ arity ];
} else {
f = fN;
}
return f;
/**
* Evaluates a function and passes the result to another function.
*
* @private
* @param {...*} [args] - arguments
* @returns {*} result
*/
function fN() {
var args;
var i;
args = [];
for ( i = 0; i < arguments.length; i++ ) {
args.push( arguments[ i ] );
}
return apply( fcn, args, after, thisArg );
}
/**
* Evaluates a function and passes the result to another function.
*
* @private
* @param {*} x0 - first argument
* @returns {*} result
*/
function f1( x0 ) { // eslint-disable-line no-unused-vars
var args;
var i;
// NOTE: the use of a `for` loop is intentional (both here and below), as JavaScript does not require that only a fixed number of arguments be provided; the number of provided arguments may be more or less than the signature specifies.
args = [];
for ( i = 0; i < arguments.length; i++ ) {
args.push( arguments[ i ] );
}
return apply( fcn, args, after, thisArg );
}
/**
* Evaluates a function and passes the result to another function.
*
* @private
* @param {*} x0 - first argument
* @param {*} x1 - second argument
* @returns {*} result
*/
function f2( x0, x1 ) { // eslint-disable-line no-unused-vars
var args;
var i;
args = [];
for ( i = 0; i < arguments.length; i++ ) {
args.push( arguments[ i ] );
}
return apply( fcn, args, after, thisArg );
}
/**
* Evaluates a function and passes the result to another function.
*
* @private
* @param {*} x0 - first argument
* @param {*} x1 - second argument
* @param {*} x2 - third argument
* @returns {*} result
*/
function f3( x0, x1, x2 ) { // eslint-disable-line no-unused-vars
var args;
var i;
args = [];
for ( i = 0; i < arguments.length; i++ ) {
args.push( arguments[ i ] );
}
return apply( fcn, args, after, thisArg );
}
/**
* Evaluates a function and passes the result to another function.
*
* @private
* @param {*} x0 - first argument
* @param {*} x1 - second argument
* @param {*} x2 - third argument
* @param {*} x3 - fourth argument
* @returns {*} result
*/
function f4( x0, x1, x2, x3 ) { // eslint-disable-line no-unused-vars
var args;
var i;
args = [];
for ( i = 0; i < arguments.length; i++ ) {
args.push( arguments[ i ] );
}
return apply( fcn, args, after, thisArg );
}
/**
* Evaluates a function and passes the result to another function.
*
* @private
* @param {*} x0 - first argument
* @param {*} x1 - second argument
* @param {*} x2 - third argument
* @param {*} x3 - fourth argument
* @param {*} x4 - fifth argument
* @returns {*} result
*/
function f5( x0, x1, x2, x3, x4 ) { // eslint-disable-line no-unused-vars
var args;
var i;
args = [];
for ( i = 0; i < arguments.length; i++ ) {
args.push( arguments[ i ] );
}
return apply( fcn, args, after, thisArg );
}
/**
* Evaluates a function and passes the result to another function.
*
* @private
* @param {*} x0 - first argument
* @param {*} x1 - second argument
* @param {*} x2 - third argument
* @param {*} x3 - fourth argument
* @param {*} x4 - fifth argument
* @param {*} x5 - sixth argument
* @returns {*} result
*/
function f6( x0, x1, x2, x3, x4, x5 ) { // eslint-disable-line no-unused-vars
var args;
var i;
args = [];
for ( i = 0; i < arguments.length; i++ ) {
args.push( arguments[ i ] );
}
return apply( fcn, args, after, thisArg );
}
/**
* Evaluates a function and passes the result to another function.
*
* @private
* @param {*} x0 - first argument
* @param {*} x1 - second argument
* @param {*} x2 - third argument
* @param {*} x3 - fourth argument
* @param {*} x4 - fifth argument
* @param {*} x5 - sixth argument
* @param {*} x6 - seventh argument
* @returns {*} result
*/
function f7( x0, x1, x2, x3, x4, x5, x6 ) { // eslint-disable-line no-unused-vars
var args;
var i;
args = [];
for ( i = 0; i < arguments.length; i++ ) {
args.push( arguments[ i ] );
}
return apply( fcn, args, after, thisArg );
}
/**
* Evaluates a function and passes the result to another function.
*
* @private
* @param {*} x0 - first argument
* @param {*} x1 - second argument
* @param {*} x2 - third argument
* @param {*} x3 - fourth argument
* @param {*} x4 - fifth argument
* @param {*} x5 - sixth argument
* @param {*} x6 - seventh argument
* @param {*} x7 - eighth argument
* @returns {*} result
*/
function f8( x0, x1, x2, x3, x4, x5, x6, x7 ) { // eslint-disable-line no-unused-vars
var args;
var i;
args = [];
for ( i = 0; i < arguments.length; i++ ) {
args.push( arguments[ i ] );
}
return apply( fcn, args, after, thisArg );
}
/**
* Evaluates a function and passes the result to another function.
*
* @private
* @param {*} x0 - first argument
* @param {*} x1 - second argument
* @param {*} x2 - third argument
* @param {*} x3 - fourth argument
* @param {*} x4 - fifth argument
* @param {*} x5 - sixth argument
* @param {*} x6 - seventh argument
* @param {*} x7 - eighth argument
* @param {*} x8 - ninth argument
* @returns {*} result
*/
function f9( x0, x1, x2, x3, x4, x5, x6, x7, x8 ) { // eslint-disable-line no-unused-vars
var args;
var i;
args = [];
for ( i = 0; i < arguments.length; i++ ) {
args.push( arguments[ i ] );
}
return apply( fcn, args, after, thisArg );
}
/**
* Evaluates a function and passes the result to another function.
*
* @private
* @param {*} x0 - first argument
* @param {*} x1 - second argument
* @param {*} x2 - third argument
* @param {*} x3 - fourth argument
* @param {*} x4 - fifth argument
* @param {*} x5 - sixth argument
* @param {*} x6 - seventh argument
* @param {*} x7 - eighth argument
* @param {*} x8 - ninth argument
* @param {*} x9 - tenth argument
* @returns {*} result
*/
function f10( x0, x1, x2, x3, x4, x5, x6, x7, x8, x9 ) { // eslint-disable-line no-unused-vars
var args;
var i;
args = [];
for ( i = 0; i < arguments.length; i++ ) {
args.push( arguments[ i ] );
}
return apply( fcn, args, after, thisArg );
}
}
// EXPORTS //
module.exports = decorateAfter;
|