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The difference between try/catch/throw and try/catch(e)/throw e
...e) { ... }
are similar in that both will catch every exception thrown inside the try block (and, unless you are simply using this to log the exceptions, should be avoided). Now look at these:
try { ... }
catch ()
{
/* ... */
throw;
}
try { ... }
catch (Exception e)
{
/* ... */
th...
Define make variable at rule execution time
...TMP/hi.txt ;\
tar -C $$TMP cf $@ . ;\
rm -rf $$TMP ;\
I have consolidated some related tips here: https://stackoverflow.com/a/29085684/86967
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What is the difference between save and export in Docker?
...th containers, while the other works with images.
An image has to be considered as 'dead' or immutable, starting 0 or 1000 containers from it won't alter a single byte. That's why I made a comparison with a system install ISO earlier. It's maybe even closer to a live-CD.
A container "boots" the im...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
...td. dev. of 7 runs, 10 loops each)
60x faster than zip
In general, avoid using apply
Apply is generally not much faster than iterating over a Python list. Let's test the performance of a for-loop to do the same thing as above
%%timeit
A1, A2 = [], []
for val in df['a']:
A1.append(val**2)
...
How does zip(*[iter(s)]*n) work in Python?
...from i'th element of each of the input sequences. Since both iterators are identical in our case, zip moves the same iterator twice for each 2-element tuple of output.
In [41]: help(zip)
Help on built-in function zip in module __builtin__:
zip(...)
zip(seq1 [, seq2 [...]]) -> [(seq1[0], seq...
Regex lookahead for 'not followed by' in grep
....
If you don't have (a sufficiently recent version of) GNU grep, then consider getting ack.
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How do I ignore the initial load when watching model changes in AngularJS?
... and new value approach suggested by @MW. is both simpler and more Angular idiomatic. Can you update the accepted answer?
– gerryster
Nov 18 '14 at 19:56
2
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Finding Number of Cores in Java
...s number of physical cores .
private int getNumberOfCPUCores() {
OSValidator osValidator = new OSValidator();
String command = "";
if(osValidator.isMac()){
command = "sysctl -n machdep.cpu.core_count";
}else if(osValidator.isUnix()){
command = "lscpu";
}else if(o...
How can I obtain the element-wise logical NOT of a pandas Series?
...ctually tested the tilde as it was mentioned in the documentation, but it didn't perform the same as np.invert :S
– root
Apr 14 '13 at 13:11
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How to use > in an xargs command?
... must always be a single completely separate argument to the command to avoid code injection bugs. What you need to do, is this:
xargs -I{} sh -c 'grep ABC "$1" > "$1.out"' -- {}
Applies to xargs as well as find.
By the way, never use xargs without the -0 option (unless for very rare and con...