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How to check if a file is a valid image file?
...r most image formats but not all. as per my original problem with svg, xcf and psd files, well those are undetected in imghdr as well
– Sujoy
May 26 '09 at 12:54
2
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Java 8 Streams: multiple filters vs. complex condition
...re is any difference.
Combining two filter instances creates more objects and hence more delegating code but this can change if you use method references rather than lambda expressions, e.g. replace filter(x -> x.isCool()) by filter(ItemType::isCool). That way you have eliminated the synthetic d...
Convert SVG image to PNG with PHP
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That's funny you asked this, I just did this recently for my work's site and I was thinking I should write a tutorial... Here is how to do it with PHP/Imagick, which uses ImageMagick:
$usmap = '/path/to/blank/us-map.svg';
$im = new Imagick();
$svg = file_get_contents($usmap);
/*loop to color eac...
Force R to stop plotting abbreviated axis labels - e.g. 1e+00 in ggplot2
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Just an update to what @Arun made, since I tried it today and it didn't work because it was actualized to
+ scale_x_continuous(labels = scales::comma)
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快速开发CSS的利器LESS 系列教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...less的运行环境
让sublime text支持less文件的编译
打开：https://github.com/danro/LESS-sublime 将less文件的压缩包下载下来。将文件解压之后，放置于sublime的data中的packages文件夹中。
html文件能够解析less文件的设置
从http://lesscss.org下载le...
Use RSA private key to generate public key?
I don't really understand this one:
9 Answers
9
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Automating “enter” keypresses for bash script generating ssh keys
...de a "yes" answer to whatever a program might prompt for). yes is shorter, and should ssh-keygen ever add a question, that will automatically be answered in too. :)
– zrajm
Apr 24 '15 at 11:08
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TortoiseSVN icons not showing up under Windows 7
I can't seem to get the icons to display under Windows 7 and I really miss this from Windows XP.
31 Answers
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优化InnerHTML操作 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...如下：
<html>
<head>
<title>test</title>
</head>
<body>
<div>
<p>data<p>
</div>
<script>
document.onmousedown = function() {
for (var i = 0; i < 10; i++) {
var p = document.createElement("p");
p.appendChild(document.createTextNode(Math.random()));
d...
Replacing a char at a given index in string? [duplicate]
String does not have ReplaceAt() , and I'm tumbling a bit on how to make a decent function that does what I need. I suppose the CPU cost is high, but the string sizes are small so it's all ok
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