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Grep only the first match and stop
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-m 1 means return the first match in any given file. But it will still continue to search in other files. Also, if there are two or more matched in the same line, all of them will be displayed.
You can use head -1 to solve this...
Most efficient way to prepend a value to an array
...more efficient way of prepending to the array that would not require O(N + 1) steps?
9 Answers
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What is the difference between HashSet and List?
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Unlike a List<> ...
A HashSet is a List with no duplicate members.
Because a HashSet is...
图片轮播使用指导 · App Inventor 2 中文网
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快速上手
上传几张图片素材（如 1.jpg、2.jpg、3.jpg）；
拖一个图片轮播到屏幕，宽度设为「充满」，在属性面板的图片列表字串（ImagesFromString）点击「编辑图片…」，选择素材、上传本地图片或添加网络...
Getting current date and time in JavaScript
...() returns a zero-based number so to get the correct month you need to add 1, so calling .getMonth() in may will return 4 and not 5.
So in your code we can use currentdate.getMonth()+1 to output the correct value. In addition:
.getDate() returns the day of the month <- this is the one you want...
Which is better, number(x) or parseFloat(x)?
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The difference between parseFloat and Number
parseFloat/parseInt is for parsing a string, whil...
How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
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12 Answers
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How to find the largest file in a directory and its subdirectories?
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15 Answers
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How to loop through all but the last item of a list?
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for x in y[:-1]
If y is a generator, then the above will not work.
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