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Count the number of occurrences of a character in a string in Javascript
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802
I have updated this answer. I like the idea of using a match better, but it is slower:
console...
Repeat each row of data.frame the number of times specified in a column
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answered May 24 '10 at 5:01
neilfwsneilfws
23.4k55 gold badges4242 silver badges5050 bronze badges
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How does lucene index documents?
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There's a fairly good article here: https://web.archive.org/web/20130904073403/http://www.ibm.com/developerworks/library/wa-lucene/
Edit 12/2014: Updated to an archived version due to the original being deleted, probably the best more recent alternative is http://lucene.apache.org/core/3_...
Can you use an alias in the WHERE clause in mysql?
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edited Oct 14 '08 at 6:58
answered Oct 14 '08 at 6:52
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Opacity of div's background without affecting contained element in IE 8?
...ur instead.
The CSS is fairly simple:
.myelement {
background: rgba(200, 54, 54, 0.5);
}
...where the first three numbers are the red, green and blue values for your background colour, and the fourth is the 'alpha' channel value, which works the same way as the opacity value.
See this page ...
数据挖掘——分词入门 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
... int strLen = str.length(); //传入字符串的长度
int j = 0;
String matchWord = ""; //根据词库里识别出来的词
int matchPos = 0; //根据词库里识别出来词后当前句子中的位置
while (j < strLen) { //从0字符匹配到字符串...
How to set the thumbnail image on HTML5 video?
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Add poster="placeholder.png" to the video tag.
<video width="470" height="255" poster="placeholder.png" controls>
<source src="video.mp4" type="video/mp4">
<source src="video.ogg" type="video/ogg">
<source src="video.webm" type="video/webm">
<objec...
Reset other branch to current without a checkout
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edited Oct 19 '09 at 21:42
answered Oct 19 '09 at 21:25
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Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
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105
This thread mentions:
If you don't remember the empty tree sha1, you can always derive it w...