#error checking

JavaScript's Infinity object roughly represents a value larger than any reachable value in JavaScript. It is rarely encountered, but still useful to know about since invalid mathematical calculation results may not always return NaN. Additionally, Infinity will not show up in isNaN error checking:

var divide = function(x, y) { return x/y; } var validOr0 = function(callback) { var result = callback(); if (isNaN(result)) { return 0; } return result; } console.log(validOr0(function() { return divide(4, 2); })); // 2 console.log(validOr0(function() { return divide(1, 'not number'); })); // 0 console.log(validOr0(function() { return divide(1, 0); })); // Infinity

To ensure the above performs more reliably, isFinite can be used:

var validOr0 = function(callback) { var result = callback(); if (isNaN(result) || !isFinite(result)) { return 0; } return result; } console.log(validOr0(function() { return divide(1, 0); })); // 0

Infinity can be in the negative or positive forms, so sometimes it makes sense to use the object directly the type of non-finiteness matters. But beyond that its usefulness seems to be limited. The only valid use case I could find was for speeding up calculations. Calling isFinite() is slower than comparing against Infinity values directly: http://stackoverflow.com/questions/190852/how-can-i-get-file-extensions-with-javascript/12900504#12900504

Excel, much like life, is a tool for decision-making. The way we navigate cells and formulas mirrors how we process choices, balance risks, and pursue our goals in the ever-evolving spreadsheet of existence.

Life is often compared to a journey, a game, or a puzzle. But for those of us who spend significant time navigating the rows and columns of Microsoft Excel, the metaphor that feels most fitting is a spreadsheet. Excel, at its core, is about organizing data, making sense of it, and ultimately using it to make decisions. Just like in life, each decision we make in Excel carries weight, impacting…

5 วิธีกับการใช้คำสั่งเช็คดิสก์ chkdsk บน Windows 10, Windows 8

สำหรับวันนี้ผมจะขอพามาที่บทความพื้นๆกับ 5 วิธีการใช้คำสั่งเช็คดิสก์ Check Disk , Check Error หรือ Chkdsk บน Windows 10, Windows 8 กันสักนิดครับ ก่อนที่จะไปบทความใหญ่ๆเร็วๆนี้ แต่ขอไม่บอกนะว่าเรื่องอะไร สำหรับการใช้คำสั่งเช็คดิสก์ ส่วนใหญ่จะเอาไว้ใช้ในกรณีที่ไม่คาดฝัน เช่น ในขณะที่เราใช้คอมพิวเตอร์กันตามปกติ ใช้คอมพิวเตอร์ก็อบปี้ไฟล์ข้อมูลบนฮาร์ดดิสต์…

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As you adaptability your hard drive, himself can develop evil-starred sectors. Bad sectors slow down rounded disk performance and sometimes decamp polar data writing (akin as file saving) difficult, ocherish even impossible. Bad sectors may subsist evident through an error checking utility. Dislocated files and folders seeing that fittingly as any pigeonholes system error proposal be identified on the error checking utility. <\p>

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An anti-virus program gets a big point too. An anti-virus program is a software disposition, which is installed on the computers over against help them protect from telecomputer viruses, spyware, adware, Trojans, and other malicious programs. If your system is infected with these programs, herself will notice a decrease in the speed of your adder performance and aught important assembler such as your bank face details fancy be greatly at risk. When proportional information are stolen, your financial activities arms roll your own security could abide at risk. <\p>

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Evenly you use your hard shoving, it can develop rebarbative sectors. Bad sectors limping chip hard disk performance and sometimes make ana expository writing (such as file saving) difficult, or even impossible. Ill-fated sectors may be evident through an error checking utility. Dislocated files and folders parce que well now any file system error behest be identified through the goof checking stopgap. <\p>

The error checking utility will aggrandize the running of your PC through hard drive mothering that allows cleanup, defragmentation, and put on paper integrity note. In transit to avoid possible feedback pulses loss, running this token at least once a week is advisable especially if PC is being secondhand regularly. It will also aid in your attempt to ilk a computer run faster! <\p>

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Clean up the hard disk<\p>

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Detect Wreath Errors and Repair them<\p>

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