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Add one row to pandas DataFrame
...m with this answer is that it needlessly copies the entire DataFrame every time a row is appended. Using the .loc mechanism that can be avoided, especially if you're careful.
– Ken Williams
Mar 16 '17 at 16:03
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Explain the concept of a stack frame in a nutshell
...ks" when talking about higher-level languages, but they are a debugging/runtime tool managed by the runtime environment so that you can log what went wrong with your program (at a high level). At this level, things like line numbers and method and class names are often known. By the time the process...
How to use the TextWatcher class in Android?
...int start, int before, int
count) {
if (isFirstTimeChange) {
return;
}
if (s.toString().length() > 0) {
try {
currentValue = new BigDecimal(s.toString().replace(".", "").replace(',', '.'));
...
How to delete large data of table in SQL without log?
...(@Deleted_Rows > 0)
BEGIN
-- Delete some small number of rows at a time
DELETE TOP (10000) LargeTable
WHERE readTime < dateadd(MONTH,-7,GETDATE())
SET @Deleted_Rows = @@ROWCOUNT;
END
and dont forget to change the Recovery mode back to full and I think you have to take a ...
How to get duration, as int milli's and float seconds from ?
I'm trying to use chrono library for timers and durations.
4 Answers
4
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How to rsync only a specific list of files?
...'s answer below is better. Please use that one!
You might have an easier time, if you're looking for a specific list of files, putting them directly on the command line instead:
# rsync -avP -e ssh `cat deploy/rsync_include.txt` root@0.0.0.0:/var/www/
This is assuming, however, that your list i...
What is console.log?
...
Imho, better than checking every time if console.log is available is better to have something like this:if(typeof(console) == 'undefined') { console = {'log': function() {return}} } In such case you can write console.log every time you need without check...
Is “else if” faster than “switch() case”? [duplicate]
...lookup table or a hash list. This means that all items get the same access time, compared to a list of if:s where the last item takes much more time to reach as it has to evaluate every previous condition first.
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How to read a file into a variable in shell?
...und adding trailing characters is great, but after using it for quite some time I decided I needed a solution that didn't use command substitution at all.
My approach now uses read along with the printf builtin's -v flag in order to read the contents of stdin directly into a variable.
# Reads stdin ...
How can I hash a password in Java?
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You can actually use a facility built in to the Java runtime to do this. The SunJCE in Java 6 supports PBKDF2, which is a good algorithm to use for password hashing.
byte[] salt = new byte[16];
random.nextBytes(salt);
KeySpec spec = new PBEKeySpec("password".toCharArray(), salt, ...