/usr/bin/rubydigits=Array(0..9)num=digits.at(6)puts"#{num}" 以上实例运行输出结果为: 6 下面是公共的数组方法(假设array是一个 Array 对象): 数组pack 指令 下表列出了方法 Array#pack 的压缩指令。
replace(intpos, intlen, QByteArrayafter) replace(intpos, intlen, const char *after) replace(intpos, intlen, const char *after, intalen) replace(charbefore, const char *after) replace(charbefore, QByteArrayafter) replace(const char *before, const char *after) replace(const char *before, ...
cout << "Found tag at index position " << j << endl; ++j; } 1. 2. 3. 4. 5. 6. 7. 如果您只想检查QByteArray是否包含特定字符或子字符串,请使用contains()。 如果要查找字节数组中特定字符或子字符串的次数,请使用count()。 如果要将特定值的所有出现替换为另一个,请使用两个参数replace(...
replace (index, value) Replaces the object at the specified index position in theArrayobject. reset () Sets the current enumeration index (used by the next method) back to the first element. Méthodes add (value) ParamètreExplicationType de données ...
console.log(nameList.indexOf('Neo'));//includeconsole.log(nameList.includes('23')); console.log(nameList.includes(23));//at 按照下标返回索引的位置的值console.log(nameList.at(1)); console.log(nameList.at(-1)); 运行结果 3. Object ...
func insert(Element, at: Int) Inserts a new element at the specified position. func insert<C>(contentsOf: C, at: Self.Index) Inserts the elements of a sequence into the collection at the specified position. func replaceSubrange<C>(Range<Int>, with: C) Replaces a range of elements with...
RemoveAt(Int32) Entfernt das Element am angegebenen Index der JsonArray. ReplaceWith<T>(T) Ersetzt diesen Knoten durch einen neuen Wert. (Geerbt von JsonNode) ToJsonString(JsonSerializerOptions) Konvertiert die aktuelle Instanz in eine Zeichenfolge im JSON-Format. (Geerbt von JsonNode) ...
BitArray类用于以紧凑的方式表示"位的集合"(sets of bits). 虽然我们能把位的集合存储在常规数组内, ...
Although slower, d3.fcumsum can replace d3.cumsum when greater precision is needed. Uses d3.Adder.# new d3.Adder()Creates a full precision adder for IEEE 754 floating point numbers, setting its initial value to 0.# adder.add(number)...
-(void)replaceObject:obj atIndex:i将数组中索引为i处的元素用obj置换 -(void)removeObject:obj从数组中删除所有是obj的对象 -(void)removeObjectAtIndex:i从数组中删除索引为i的对像 -(void)sortUsingSelector:(SEL)selector用selector只是的比较方法将数组排序...