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How can I check if a URL exists via PHP?

How do I check if a URL exists (not 404) in PHP? 22 Answers 22 ...
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how to rotate a bitmap 90 degrees

There is a statement in android canvas.drawBitmap(visiblePage, 0, 0, paint); 10 Answers ...
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Select random row from a sqlite table

... answered Feb 17 '10 at 10:06 Adriaan StanderAdriaan Stander 146k2626 gold badges261261 silver badges272272 bronze badges ...
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Remove characters from C# string

... answered Sep 14 '11 at 5:03 Albin SunnanboAlbin Sunnanbo 43.5k88 gold badges6363 silver badges100100 bronze badges ...
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How to add a second css class with a conditional value in razor MVC 4

... 307 I believe that there can still be and valid logic on views. But for this kind of things I agree...
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Objective-C - Remove last character from string

...hat method you can trim your string like this: if ([string length] > 0) { string = [string substringToIndex:[string length] - 1]; } else { //no characters to delete... attempting to do so will result in a crash } If you want a fancy way of doing this in just one line of code you...
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How to bind a List to a ComboBox?

... 160 As you are referring to a combobox, I'm assuming you don't want to use 2-way databinding (if so,...
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浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术

...,全部位都表示数值,比如 char型,8位,用二进制表示为0000 0000 ~ 1111 1111 1111 1111 最大即为十进制255,所以 unsigned char 的范围为0~ 255,在这里普及一下2进制转十进制的方法, 二进制每一位的数值乘以它的位权(2^(n-1),n为自右向左...
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What is __gxx_personality_v0 for?

... | edited Aug 20 '17 at 18:58 curiousguy 7,13322 gold badges3535 silver badges5151 bronze badges ...
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Hex representation of a color with alpha channel?

...se rgba() functional notation with decimals or percentages, e.g. rgba(255, 0, 0, 0.5) would be 50% transparent red. RGB channels are 0-255 or 0%-100%, alpha is 0-1. In CSS 4*, you can specify the alpha channel using the 7th and 8th characters of an 8 digit hex colour, or 4th character of a 4 digit ...