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Equation (expression) parser with precedence?
...sing your sample string,
1+11*5
to do this manually, you would have to read the 1, then see the plus and start a whole new recursive parse "session" starting with 11... and make sure to parse the 11 * 5 into its own factor, yielding a parse tree with 1 + (11 * 5).
This all feels so painful even...
How to add pandas data to an existing csv file?
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I was able to accomplish it by re-read the 'my_csv.csv', then concat the new df, and then save it. If you know some easier method, please DO let me know. I appreciate!
– datanew
Nov 9 '18 at 21:56
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When do I need to use AtomicBoolean in Java?
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When multiple threads need to check and change the boolean. For example:
if (!initialized) {
initialize();
initialized = true;
}
This is not thread-safe. You can fix it by using AtomicBoolean:
if (atomicInitialized.compareAndSet(fa...
Does Android keep the .apk files? if so where?
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I want to be able to read them and do things with them. Luckily they are readable.
– Gubatron
Mar 26 '10 at 14:34
3
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Git Blame Commit Statistics
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git ls-tree -r HEAD|sed -re 's/^.{53}//'|while read filename; do file "$filename"; done|grep -E ': .*text'|sed -r -e 's/: .*//'|while read filename; do git blame -w "$filename"; done|sed -r -e 's/.*\((.*)[0-9]{4}-[0-9]{2}-[0-9]{2} .*/\1/' -e 's/ +$//'|sort|uniq -c
Step ...
Is it safe to parse a /proc/ file?
...ommit that made it atomic. On a pre-2.6.30 kernel, you can open the file, read a bit of it, then if you later come back and read again, the piece you get will be inconsistent with the first piece. (I just demonstrated this -- try it yourself for fun.)
/proc/mounts is atomic within a single read sys...
Read XML file into XmlDocument
I am very new to C#. I have XML file (text.xml). I want to read that in XmlDocument and store the stream in string variable.
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How do I escape characters in c# comments?
...amp;gt; ? I don't like if that is the case since I want to make it easy to read the comment in the actual document so I don't have to generate some kind of code document to be able to read the example code.
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Java serialization: readObject() vs. readResolve()
...other sources provide a pretty good explanation on how and when to use the readObject() method when working with serializable Java classes. The readResolve() method, on the other hand, remains a bit of a mystery. Basically all documents I found either mention only one of the two or mention both only...
nodejs how to read keystrokes from stdin
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In node >= v6.1.0:
const readline = require('readline');
readline.emitKeypressEvents(process.stdin);
process.stdin.setRawMode(true);
process.stdin.on('keypress', (str, key) => {
console.log(str)
console.log(key)
})
See https://github.com/n...