大约有 45,000 项符合查询结果(耗时:0.0749秒) [XML]

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Java FileOutputStream Create File if not exists

Is there a way to use FileOutputStream in a way that if a file (String filename) does not exist, then it will create it? 9 ...
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Generic TryParse

I am trying to create a generic extension that uses 'TryParse' to check if a string is a given type: 23 Answers ...
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How to check if mysql database exists

Is it possible to check if a (MySQL) database exists after having made a connection. 21 Answers ...
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How to check if a file contains a specific string using Bash

I want to check if a file contains a specific string or not in bash. I used this script, but it doesn't work: 11 Answers ...
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Does Python have a ternary conditional operator?

If Python does not have a ternary conditional operator, is it possible to simulate one using other language constructs? 26 ...
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What purpose does a tag serve inside of a tag?

...nit() { var dependencies = document.getElementById("inline-deps"); if (!dependencies || JS.hasClass(document.body, "deps--loaded")) { webfontsReady(); } else { var html = dependencies.innerText || dependencies.textContent; JS.addClass(document.body, "deps--loaded"); ...
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How to check if a file is empty in Bash?

I have a file called diff.txt. Want to check if it is empty. Did something like this but couldn't get it working. 10 Answe...
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Set cursor position on contentEditable

...arentAnchor && parentAnchor != document.documentElement) { if(parentAnchor == editable) { isOrContainsAnchor = true; } parentAnchor = parentAnchor.parentNode; } while(parentFocus && parentFocus != document.documentElement) { if(par...
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Assign variable in if condition statement, good practice or not? [closed]

... but use a single = instead of == or ===. For example, when you see this: if (value = someFunction()) { ... } you don't know if that's what they meant to do, or if they intended to write this: if (value == someFunction()) { ... } If you really want to do the assignment in place, I woul...
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How can I check if an argument is defined when starting/calling a batch file?

...ion, the exit needs a /B argument otherwise CMD.exe will quit. @echo off if [%1]==[] goto usage @echo This should not execute @echo Done. goto :eof :usage @echo Usage: %0 ^<EnvironmentName^> exit /B 1 share ...