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What's the difference if I put css file inside or ?

... Just to add on to what jdelStrother has mentioned about w3 specs and ARTstudio about browser rendering. It is recommended because when you have the CSS declared before <body> starts, your styles has actually loaded already. So very quickly users see something appear on their screen (...
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One line if-condition-assignment

...ssible in Python, since what you're actually trying to do probably gets expanded to something like this: num1 = 20 if someBoolValue else num1 If you exclude else num1, you'll receive a syntax error since I'm quite sure that the assignment must actually return something. As others have already me...
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How to un-commit last un-pushed git commit without losing the changes

...e to dig it from reflog in case you screw up :) ) revert commit normally and push git checkout master git revert a8172f36 #hash of the commit you want to destroy # this introduces a new commit (say, it's hash is 86b48ba) which removes changes, introduced in the commit in question (but those chan...
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What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)

I just want to understand following line of code in shell. It is used to get the current working directory. I am aware that $(variable) name return the value inside the variable name, but what is $(command) supposed to return? Does it return the value after executing the command? In that case, w...
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How to force garbage collection in Java?

...ollection in Java, even if it is tricky to do? I know about System.gc(); and Runtime.gc(); but they only suggest to do GC. How can I force GC? ...
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Specify width in *characters*

...eight of an x. More generally speaking, these are the heights of uppercase and lowercase letters. Width is a totally different issue.... Change your example above to <div> <span>1</span> 3 5 7 9 1 3 5 7 9 1 </div> and you will notice width and height of the span are...
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const vs constexpr on variables

... = 3.141592653589793; constexpr double PI2 = 3.141592653589793; Both PI1 and PI2 are constant, meaning you can not modify them. However only PI2 is a compile-time constant. It shall be initialized at compile time. PI1 may be initialized at compile time or run time. Furthermore, only PI2 can be...
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How to undo a git pull?

...s. To the commenter ORIG_HEAD is previous state of HEAD, set by commands that have possibly dangerous behavior, to be easy to revert them. It is less useful now that Git has reflog: HEAD@{1} is roughly equivalent to ORIG_HEAD (HEAD@{1} is always last value of HEAD, ORIG_HEAD is last value of ...
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Difference between java.exe and javaw.exe

...re running on javaw (not in java ). What is the difference between them and how can I run my Swing application on javaw ? ...
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Expand a div to fill the remaining width

...th floats in a specific way. Just take that second div, remove the float, and give it overflow:hidden instead. Any overflow value other than visible makes the block it's set on become a BFC. BFCs don't allow descendant floats to escape them, nor do they allow sibling/ancestor floats to intrude in...