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How to test an SQL Update statement before running it?
...t using the same WHERE clause as the UPDATE.
So if you UPDATE is
UPDATE foo
SET bar = 42
WHERE col1 = 1
AND col2 = 'foobar';
The following will show you which rows will be updated:
SELECT *
FROM foo
WHERE col1 = 1
AND col2 = 'foobar';
...
Undefined, unspecified and implementation-defined behavior
... @Celeritas: Hyper-modern compilers can do better than that. Given int foo(int x) { if (x >= 0) launch_missiles(); return x << 1; } a compiler can determine that since all means of invoking the function that don't launch the missiles invoke Undefined Behavior, it can make the call to la...
What's the best way to build a string of delimited items in Java?
...ava 8 you can use String.join():
List<String> list = Arrays.asList("foo", "bar", "baz");
String joined = String.join(" and ", list); // "foo and bar and baz"
Also have a look at this answer for a Stream API example.
...
How to turn off the Eclipse code formatter for certain sections of Java code?
...hat you want.
Else there is this ugly hack
String query = //
"SELECT FOO, BAR, BAZ" + //
" FROM ABC" + //
" WHERE BAR > 4";
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Static and Sealed class differences
...
static class Foo : object { } is valid, but is essentially static class Foo { }.
– themefield
Apr 24 '19 at 17:41
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CSS \9 in width property
...meaning of this? I am guessing it is a browser hack, but I have not been able to find what exactly it does.
4 Answers
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how do I use the grep --include option for multiple file types?
... in this case, because only files literally named something like --include=foo.html would match. To be safe, quote the * (which can you do individually with \*). As an added bonus this makes it visually clearer that is not the shell that should perform the globbing in this case.
...
How does data binding work in AngularJS?
How does data binding work in the AngularJS framework?
14 Answers
14
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Getting a list of files in a directory with a glob
... hasSuffix and hasPrefix methods? Something like (if you're searching for "foo*.jpg"):
NSString *bundleRoot = [[NSBundle mainBundle] bundlePath];
NSArray *dirContents = [[NSFileManager defaultManager] directoryContentsAtPath:bundleRoot];
for (NSString *tString in dirContents) {
if ([tString has...
multiprocessing.Pool: When to use apply, apply_async or map?
...alling get().
For example:
import multiprocessing as mp
import time
def foo_pool(x):
time.sleep(2)
return x*x
result_list = []
def log_result(result):
# This is called whenever foo_pool(i) returns a result.
# result_list is modified only by the main process, not the pool workers....