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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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Minimum and maximum value of z-index?

...r>) or real number values (denoted by <number>). Real numbers and integers are specified in decimal notation only. An <integer> consists of one or more digits "0" to "9". A <number> can either be an <integer>, or it can be zero or more digits followed by a ...
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PHP: How to check if image file exists?

.../'.$filename)) { … } Also, make sure $filename is properly validated. And then, it will only work when allow_url_fopen is activated in your PHP config share | improve this answer | ...
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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 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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C++ Modules - why were they removed from C++0x? Will they be back later on?

...arate TR:" These topics are deemed too important to wait for another standard after C++0x before being published, but too experimental to be finalised in time for the next Standard. Therefore, these features will be delivered by a technical report at the earliest opportunity. The modules propo...
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What are “res” and “req” parameters in Express functions?

...mine what kind of browser made the request, what sort of responses it can handle, whether or not it's able to understand HTTP compression, etc. An array of query string parameters if there were any, in request.query (e.g. /people.json?foo=bar would result in request.query.foo containing the string "...
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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...
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Manifest merger failed : uses-sdk:minSdkVersion 14

Since downloading the latest SDK and installing Android Studio, my project fails to build. I get the following message: 28 ...
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How to trigger HTML button when you press Enter in textbox?

... It is…… 2020. And I believe this still holds true. DO NOT USE keypress keypress event is not triggered when the user presses a key that does not produce any character, such as Tab, Caps Lock, Delete, Backspace, Escape, left & righ...