JS 依照元素出現數量排序
同樣是最近遇到的狀況，需要利用陣列內元素出現的數量進行排序，以下為範例程式：
var array = ["1", "2", "4", "5", "2", "4", "2", "3"];
var str = array.toString();
var filter = [];
var result = [];
document.write("原始陣列：" + array + "<br>");
var get = function (str, tar, arr, tmp) {
if (str.indexOf(tar) >= 0) {
tmp = str.slice(str.indexOf(tar) + 1);
arr.push(tar);
get(tmp, tar, arr, tmp);
}
return arr;
}
for (i in array) {
var elm = [];
var tmp;
var fstr = filter.join();
if (fstr.indexOf(array[i]) >= 0) {
continue;
} else {
var tmp_arr = get(str, array[i], elm, tmp);
result.push(tmp_arr.length + ':' + tmp_arr[0]);
filter.push(array[i]);
}
}
result.sort();
result.reverse();
//按照出現次數排序，不刪除重複元素
var finishArray = [];
for (index in result) {
var show = result[index].split(':');
for (i = 0; i < show[0]; i++) {
finishArray.push(show[1]);
}
}
document.write("按出現次數排序，不刪除重複元素：" + finishArray + "<br>");
//按照出現次數排序，刪除重複元素
var finishArray = [];
for (index in result) {
var show = result[index].split(':');
finishArray.push(show[1]);
}
document.write("按出現次數排序，刪除重複元素：" + finishArray + "<br>");
輸出結果：
原始陣列：1,2,4,5,2,4,2,3 按出現次數排序，不刪除重複元素：2,2,2,4,4,5,3,1 按出現次數排序，刪除重複元素：2,4,5,3,1
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The Complete Guide to Rain Gutter Setting up, Gutter Guard Setting up, and Rain Gutter Cleansing Services
If you are an owner of a house, one comprehend the significance of upkeeping an functional gutter system. Rain gutters play an important role in safeguarding your house from rainwater harm by directing rainwater away from the roof and base. However, ensuring your gutters are in optimal condition demands more than just occasional cleaning. From rain gutter installation to rain gutter protector setting up and rain gutter cleaning assistance, this complete manual covers everything one require to understand to keep your gutters in optimal shape.
Gutter Setting up
Why Rain Gutters Are Important
Before we plunge into rain gutter installation, let’s comprehend why gutters are vital for your home. Rain gutters help avert water harm by directing water from rainfall away from your home’s base, walls, and landscaping. Without adequate water drainage, rainwater runoff can cause wear and tear, basement flooding, mold growth, and constructional damage.
Signs You Need New Gutters
Cracks or Rust: Visible cracks or rust spots indicate that your rain gutters are deteriorating and might require to be replaced.
Sagging or Pulling Away: Rain gutters that sag or pull away from the house are not effectively directing rainwater away and should be replaced.
Water Damage: Water stains on the exterior of your home or basement flooding might suggest that your gutters are not functioning properly to do their job.
Frequent Clogs: If your rain gutters are continuously clogged with debris, it may be time to invest in an updated rain gutter system that is easier to upkeep.
Rain Gutter Materials
When it comes to gutter materials, one have numerous options to select from:
Aluminum: Lightweight, rust-resistant, and accessible in a variety of colors.
Vinyl: Affordable, easy to install, and low maintenance.
Steel: Durable and suitable for regions with harsh weather conditions.
Copper: Elegant, long-lasting, and adds a decorative touch to your house.
DIY vs. Professional Setting up
While some homeowners might attempt to install rain gutters themselves, it’s often best to leave this job to the professionals. Professional gutter installers have the experience, tools, and expertise to ensure that your rain gutters are installed correctly and operate optimally. Plus, hiring a professional can save you time and hassle in the long run.
Rain Gutter Guard Setting up
The Importance of Gutter Guards
Gutter guards are an essential addition to any rain gutter system. These protective covers prevent leaves, twigs, and debris from clogging your rain gutters, reducing the requirement for frequent cleaning and minimizing the risk of water damage to your house.
Types of Rain Gutter Guards
Mesh Screens: Fine mesh screens permit water to flow through while blocking debris.
Reverse Curve: These rain gutter guards feature a curved surface that directs water into the rain gutter while stopping leaves and debris from entering.
Brush Inserts: Brush-style inserts fit inside the rain gutter and stop leaves from accumulating while allowing water to flow freely.
Foam Inserts: Foam rain gutter guards block debris while allowing water to filter through.
Professional Installation vs. DIY
While some house owners may attempt to set up gutter guards themselves, professional installation is often recommended. Professional installers can ensure that rain gutter guards are properly fitted and securely attached, minimizing the risk of debris buildup and water damage.
Gutter Cleansing Services
The Importance of Rain Gutter Cleaning
Regular rain gutter cleaning is essential for maintaining a functional rain gutter system. Over time, leaves, twigs, and debris can accumulate in your gutters, resulting to clogs and water overflow. Professional rain gutter cleaning services can help prevent these issues and extend the life of your rain gutters.
Signs You Require Rain Gutter Cleaning
Visible Debris: If you observe leaves, twigs, or other debris in your gutters, it’s time for an cleansing.
Water Overflow: Overflowing gutters during rainstorms indicate that they are clogged and require to be cleaned.
Sagging Gutters: Gutters that sag or pull away from the house might be weighed down by debris and need cleaning.
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Frequency of Gutter Cleaning
The frequency of rain gutter cleaning depends on several factors, including the surrounding vegetation, climate, and rain gutter guard installation. In general, it’s recommended to clean your gutters at least twice a year, ideally in the spring and fall, to remove seasonal debris buildup.
Conclusion
Maintaining a functional gutter system is essential for shielding your home from water damage and preserving its structural integrity. Whether you need rain gutter installation, rain gutter guard installation, or gutter cleaning assistance, investing in professional assistance can save you time, money, and hassle in the long run. By prioritizing gutter, you can ensure that your house remains safe, dry, and secured for years to come.
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