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“21天教你学会C++” - 创意 - 清泛网 - 专注C/C++及内核技术
...。到了20岁，这些优秀者在其生命中练习音乐总共超过 10,000 小时。与之对比，其它人只平均有8,000小时，而未来只能留校当老师的人仅仅是4,000 小时。
所以，这也许需要10,000 小时，并不是十年，但这是一个magic number。Samuel Joh...
NTFS performance and large volumes of files and directories
...folders (e.g., lets say you have 100M files. It's better to store them in 1000 folders so that you only have 100,000 files per folder than to store them into 1 big folder. This will create 1000 folder indices instead of a single big one that's more likely to hit the max # of fragments limit or
b) M...
CSS table layout: why does table-row not accept a margin?
...der from the row, i had used border on the row as border-bottom:1px solid #000, any idea?
– Abbas
Mar 20 '18 at 22:49
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When should the xlsm or xlsb formats be used?
...s 1.5 times a bigger file. I tested this on a generated worksheet with 10'000 rows * 1'000 columns = 10'000'000 (10^7) cells of simple chained =…+1 formulas:
╭──────────────╥────────┬────────╮
│ ║ .xlsx │ .xl...
Parameterize an SQL IN clause
... Yes, this is a table scan. Great for 10 rows, lousy for 100,000.
– Will Hartung
Dec 3 '08 at 16:48
17
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Throwing the fattest people off of an overloaded airplane.
...ay you've got an airplane, and it is low on fuel. Unless the plane drops 3000 pounds of passenger weight, it will not be able to reach the next airport. To save the maximum number of lives, we would like to throw the heaviest people off of the plane first.
...
How to strike through obliquely with css
...he CSS:
HR
{
width: 50px;
position: absolute;
background-color: #000000;
color: #000000;
border-color: #000000;
transform:rotate(-7deg);
-ms-transform:rotate(-7deg);
-moz-transform:rotate(-7deg);
-webkit-transform:rotate(-7deg);
-o-transform:rotate(-7deg);
}
Fiddle
...
How can I find the method that called the current method?
...n most cases the Caller Information is much faster still. In a sample of 1000 iterations, I clocked it as 40 times faster.
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How to check if hex color is “too black”?
...ived brightness is light.
tinycolor("#fff").isLight(); // true
tinycolor("#000").isLight(); // false
isDark
Return a boolean indicating whether the color's perceived brightness is dark.
tinycolor("#fff").isDark(); // false
tinycolor("#000").isDark(); // true
getLuminance
Returns the perceive...
Full-screen iframe with a height of 100%
...isplay: block; /* iframes are inline by default */
background: #000;
border: none; /* Reset default border */
height: 100vh; /* Viewport-relative units */
width: 100vw;
}
<iframe></iframe>
Approach 2 - Fixed positioning
This approach...