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How to tell if JRE or JDK is installed
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You can open up terminal and simply type
java -version // this will check your jre version
j...
How do I make a transparent canvas in html5?
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198
Canvases are transparent by default.
Try setting a page background image, and then put a canv...
Chmod recursively
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You need read access, in addition to execute access, to list a directory. If you only have exe...
Get the name of the currently executing method
... name as a string, call __method__.to_s instead.
Note: This requires Ruby 1.8.7.
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How does Java handle integer underflows and overflows and how would you check for it?
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12 Answers
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Java Regex Capturing Groups
...of quantifier. You're using a greedy quantifier in your first group (index 1 - index 0 represents the whole Pattern), which means it'll match as much as it can (and since it's any character, it'll match as many characters as there are in order to fulfill the condition for the next groups).
In shor...
How do I find all installed packages that depend on a given package in NPM?
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You're looking for https://docs.npmjs.com/cli/ls
For example, to see which packages depend on...
How do you clone a BufferedImage
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Something like this?
static BufferedImage deepCopy(BufferedImage bi) {
ColorModel cm = bi.ge...
error: ‘NULL’ was not declared in this scope
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NULL is not a keyword. It's an identifier defined in some standard headers. You can include
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