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Add castSlice and rename cast related helpers.

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John-David Dalton
2016-04-09 13:49:38 -07:00
parent 17e1a6dbe8
commit cf2f538167
1 changed files with 102 additions and 85 deletions
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187
lodash.js
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@@ -2356,50 +2356,6 @@
return result;
}
/**
* Casts `value` to an empty array if it's not an array like object.
*
* @private
* @param {*} value The value to inspect.
* @returns {Array|Object} Returns the cast array-like object.
*/
function baseCastArrayLikeObject(value) {
return isArrayLikeObject(value) ? value : [];
}
/**
* Casts `value` to `identity` if it's not a function.
*
* @private
* @param {*} value The value to inspect.
* @returns {Function} Returns cast function.
*/
function baseCastFunction(value) {
return typeof value == 'function' ? value : identity;
}
/**
* Casts `value` to a string if it's not a string or symbol.
*
* @private
* @param {*} value The value to inspect.
* @returns {string|symbol} Returns the cast key.
*/
function baseCastKey(key) {
return (typeof key == 'string' || isSymbol(key)) ? key : (key + '');
}
/**
* Casts `value` to a path array if it's not one.
*
* @private
* @param {*} value The value to inspect.
* @returns {Array} Returns the cast property path array.
*/
function baseCastPath(value) {
return isArray(value) ? value : stringToPath(value);
}
/**
* The base implementation of `_.clamp` which doesn't coerce arguments to numbers.
*
@@ -2801,7 +2757,7 @@
* @returns {*} Returns the resolved value.
*/
function baseGet(object, path) {
path = isKey(path, object) ? [path] : baseCastPath(path);
path = isKey(path, object) ? [path] : castPath(path);
var index = 0,
length = path.length;
@@ -2963,7 +2919,7 @@
*/
function baseInvoke(object, path, args) {
if (!isKey(path, object)) {
path = baseCastPath(path);
path = castPath(path);
object = parent(object, path);
path = last(path);
}
@@ -3485,7 +3441,7 @@
splice.call(array, index, 1);
}
else if (!isKey(index, array)) {
var path = baseCastPath(index),
var path = castPath(index),
object = parent(array, path);
if (object != null) {
@@ -3575,7 +3531,7 @@
* @returns {Object} Returns `object`.
*/
function baseSet(object, path, value, customizer) {
path = isKey(path, object) ? [path] : baseCastPath(path);
path = isKey(path, object) ? [path] : castPath(path);
var index = -1,
length = path.length,
@@ -3854,7 +3810,7 @@
* @returns {boolean} Returns `true` if the property is deleted, else `false`.
*/
function baseUnset(object, path) {
path = isKey(path, object) ? [path] : baseCastPath(path);
path = isKey(path, object) ? [path] : castPath(path);
object = parent(object, path);
var key = last(path);
return (object != null && has(object, key)) ? delete object[key] : true;
@@ -3964,6 +3920,54 @@
return result;
}
/**
* Casts `value` to an empty array if it's not an array like object.
*
* @private
* @param {*} value The value to inspect.
* @returns {Array|Object} Returns the cast array-like object.
*/
function castArrayLikeObject(value) {
return isArrayLikeObject(value) ? value : [];
}
/**
* Casts `value` to `identity` if it's not a function.
*
* @private
* @param {*} value The value to inspect.
* @returns {Function} Returns cast function.
*/
function castFunction(value) {
return typeof value == 'function' ? value : identity;
}
/**
* Casts `value` to a path array if it's not one.
*
* @private
* @param {*} value The value to inspect.
* @returns {Array} Returns the cast property path array.
*/
function castPath(value) {
return isArray(value) ? value : stringToPath(value);
}
/**
* Casts `array` to a slice if it's needed.
*
* @private
* @param {Array} array The array to inspect.
* @param {number} start The start position.
* @param {number} [end=array.length] The end position.
* @returns {Array} Returns the cast slice.
*/
function castSlice(array, start, end) {
var length = array.length;
end = end === undefined ? length : end;
return (!start && end >= length) ? array : baseSlice(array, start, end);
}
/**
* Creates a clone of `buffer`.
*
@@ -4357,8 +4361,13 @@
? stringToArray(string)
: undefined;
var chr = strSymbols ? strSymbols[0] : string.charAt(0),
trailing = strSymbols ? strSymbols.slice(1).join('') : string.slice(1);
var chr = strSymbols
? strSymbols[0]
: string.charAt(0);
var trailing = strSymbols
? castSlice(strSymbols, 1).join('')
: string.slice(1);
return chr[methodName]() + trailing;
};
@@ -4637,7 +4646,7 @@
}
var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
return reHasComplexSymbol.test(chars)
? stringToArray(result).slice(0, length).join('')
? castSlice(stringToArray(result), 0, length).join('')
: result.slice(0, length);
}
@@ -5345,7 +5354,7 @@
* @returns {boolean} Returns `true` if `path` exists, else `false`.
*/
function hasPath(object, path, hasFunc) {
path = isKey(path, object) ? [path] : baseCastPath(path);
path = isKey(path, object) ? [path] : castPath(path);
var result,
index = -1,
@@ -5783,6 +5792,17 @@
return result;
});
/**
* Converts `value` to a string key if it's not a string or symbol.
*
* @private
* @param {*} value The value to inspect.
* @returns {string|symbol} Returns the key.
*/
function toKey(key) {
return (typeof key == 'string' || isSymbol(key)) ? key : (key + '');
}
/**
* Converts `func` to its source code.
*
@@ -6481,7 +6501,7 @@
* // => [2]
*/
var intersection = rest(function(arrays) {
var mapped = arrayMap(arrays, baseCastArrayLikeObject);
var mapped = arrayMap(arrays, castArrayLikeObject);
return (mapped.length && mapped[0] === arrays[0])
? baseIntersection(mapped)
: [];
@@ -6512,7 +6532,7 @@
*/
var intersectionBy = rest(function(arrays) {
var iteratee = last(arrays),
mapped = arrayMap(arrays, baseCastArrayLikeObject);
mapped = arrayMap(arrays, castArrayLikeObject);
if (iteratee === last(mapped)) {
iteratee = undefined;
@@ -6547,7 +6567,7 @@
*/
var intersectionWith = rest(function(arrays) {
var comparator = last(arrays),
mapped = arrayMap(arrays, baseCastArrayLikeObject);
mapped = arrayMap(arrays, castArrayLikeObject);
if (comparator === last(mapped)) {
comparator = undefined;
@@ -8944,7 +8964,7 @@
if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
iteratees = [];
} else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
iteratees.length = 1;
iteratees = [iteratees[0]];
}
return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
});
@@ -9850,7 +9870,7 @@
start = start === undefined ? 0 : nativeMax(toInteger(start), 0);
return rest(function(args) {
var array = args[start],
otherArgs = args.slice(0, start);
otherArgs = castSlice(args, 0, start);
if (array) {
arrayPush(otherArgs, array);
@@ -11498,8 +11518,8 @@
}
/**
* Converts `value` to a string if it's not one. An empty string is returned
* for `null` and `undefined` values. The sign of `-0` is preserved.
* Converts `value` to a string. An empty string is returned for `null`
* and `undefined` values. The sign of `-0` is preserved.
*
* @static
* @memberOf _
@@ -12477,7 +12497,7 @@
if (object == null) {
return {};
}
props = arrayMap(baseFlatten(props, 1), baseCastKey);
props = arrayMap(baseFlatten(props, 1), toKey);
return basePick(object, baseDifference(getAllKeysIn(object), props));
});
@@ -12583,7 +12603,7 @@
* // => 'default'
*/
function result(object, path, defaultValue) {
path = isKey(path, object) ? [path] : baseCastPath(path);
path = isKey(path, object) ? [path] : castPath(path);
var index = -1,
length = path.length;
@@ -12829,7 +12849,7 @@
* // => 0
*/
function update(object, path, updater) {
return object == null ? object : baseUpdate(object, path, baseCastFunction(updater));
return object == null ? object : baseUpdate(object, path, castFunction(updater));
}
/**
@@ -12858,7 +12878,7 @@
*/
function updateWith(object, path, updater, customizer) {
customizer = typeof customizer == 'function' ? customizer : undefined;
return object == null ? object : baseUpdate(object, path, baseCastFunction(updater), customizer);
return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
}
/**
@@ -13567,7 +13587,7 @@
)) {
separator += '';
if (separator == '' && reHasComplexSymbol.test(string)) {
return baseCastArray(stringToArray(string), 0, limit);
return castSlice(stringToArray(string), 0, limit);
}
}
return string.split(separator, limit);
@@ -13918,16 +13938,15 @@
if (guard || chars === undefined) {
return string.replace(reTrim, '');
}
chars += '';
if (!chars) {
if (!(chars += '')) {
return string;
}
var strSymbols = stringToArray(string),
chrSymbols = stringToArray(chars);
chrSymbols = stringToArray(chars),
start = charsStartIndex(strSymbols, chrSymbols),
end = charsEndIndex(strSymbols, chrSymbols) + 1;
return strSymbols
.slice(charsStartIndex(strSymbols, chrSymbols), charsEndIndex(strSymbols, chrSymbols) + 1)
.join('');
return castSlice(strSymbols, start, end).join('');
}
/**
@@ -13957,14 +13976,13 @@
if (guard || chars === undefined) {
return string.replace(reTrimEnd, '');
}
chars += '';
if (!chars) {
if (!(chars += '')) {
return string;
}
var strSymbols = stringToArray(string);
return strSymbols
.slice(0, charsEndIndex(strSymbols, stringToArray(chars)) + 1)
.join('');
var strSymbols = stringToArray(string),
end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;
return castSlice(strSymbols, 0, end).join('');
}
/**
@@ -13994,14 +14012,13 @@
if (guard || chars === undefined) {
return string.replace(reTrimStart, '');
}
chars += '';
if (!chars) {
if (!(chars += '')) {
return string;
}
var strSymbols = stringToArray(string);
return strSymbols
.slice(charsStartIndex(strSymbols, stringToArray(chars)))
.join('');
var strSymbols = stringToArray(string),
start = charsStartIndex(strSymbols, stringToArray(chars));
return castSlice(strSymbols, start).join('');
}
/**
@@ -14065,7 +14082,7 @@
return omission;
}
var result = strSymbols
? strSymbols.slice(0, end).join('')
? castSlice(strSymbols, 0, end).join('')
: string.slice(0, end);
if (separator === undefined) {
@@ -14988,7 +15005,7 @@
*/
function toPath(value) {
if (isArray(value)) {
return arrayMap(value, baseCastKey);
return arrayMap(value, toKey);
}
return isSymbol(value) ? [value] : copyArray(stringToPath(value));
}