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Python string.replace regular expression [duplicate]
...ons are cached (docs), so compiling isn't even necessary. But as you show, if one compiles, compile outside the loop.
– alttag
Nov 14 '17 at 22:01
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How to make “if not true condition”?
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try
if ! grep -q sysa /etc/passwd ; then
grep returns true if it finds the search target, and false if it doesn't.
So NOT false == true.
if evaluation in shells are designed to be very flexible, and many times doesn't require...
What do numbers using 0x notation mean?
...addition! That's just the memory representation though, I guess similar to if we would agree that we have a set of numbers from 0--999 and that 1000--1999 would represent the negative numbers. My question was about human-readable notation, though knowing how computers do it might help someone else, ...
Dialog throwing "Unable to add window — token null is not for an application” with getApplication()
...lertDialog which requires a Context as a parameter. This works as expected if I use:
28 Answers
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What is the use of GO in SQL Server Management Studio & Transact SQL?
...pid but what does 'batch of code' mean? msdn says after GO the variables' lifespan expire. Sounds nothing to do with transaction commitment right? Is there any circumstances where I should keep the GO statement in my scripts?
– kate1138
Oct 3 '14 at 6:49
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ImageUtil 扩展：图像工具扩展，提供图像处理和变换功能 · App Inventor 2 中文网
...鼠标移动时拖动元素 document.onmousemove = function(e) { if (!isDragging) return; element.style.left = (e.clientX - offsetX) + 'px'; element.style.top = (e.clientY - offsetY) + 'px'; }; // 鼠标释放时停止拖动 document.onmouseup = function(...
How to determine MIME type of file in android?
...null;
String extension = MimeTypeMap.getFileExtensionFromUrl(url);
if (extension != null) {
type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
}
return type;
}
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Do you leave parentheses in or out in Ruby? [closed]
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multiple arguments and no parentheses.
A lot of Ruby-based Domain Specific Languages (such as Rake) don't use
parenthesis to preserve a more natural
language feel to their statements.
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Remove everything after a certain character
...g the value from an href and up to the "?", and it's always going to be a different amount of characters.
8 Answers
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What is the “continue” keyword and how does it work in Java?
I saw this keyword for the first time and I was wondering if someone could explain to me what it does.
13 Answers
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