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Is Java “pass-by-reference” or “pass-by-value”?
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Java is always pass-by-value.
Unfortunately, we never handle an object at all, instead juggling object-handles called references (which are passed by value of course). The chosen terminology and semantics easily confuse many beginners.
It goes like this:
p...
Only mkdir if it does not exist [duplicate]
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I can't find the source on the fly, but for Makefiles mkdir -p is discouraged b/c there may be race conditions in concurrent execution. So, depending on what your script does and in which environment it lives the first option given is this answer should be preferr...
XML schema or DTD for logback.xml?
...ssions on the net about how great it would be to have an XML schema or DTD for logback.xml file to have at least the very basic validation and auto-completion in IDEs like IDEA or Eclipse, but I never saw any solution.
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CSS selector based on element text? [duplicate]
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Try :empty css selector. Worked out for me.
– Dmitrii Malyshev
Aug 3 '16 at 16:05
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How to screenshot website in JavaScript client-side / how Google did it? (no need to access HDD) [du
... to the real representation as it does not make an actual screenshot". Not for me :(.
– Paweł Szymański
Aug 4 '11 at 5:16
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Python loop counter in a for loop [duplicate]
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Use enumerate() like so:
def draw_menu(options, selected_index):
for counter, option in enumerate(options):
if counter == selected_index:
print " [*] %s" % option
else:
print " [ ] %s" % option
options = ['Option 0', 'Option 1', 'Option 2', 'Opt...
“Assert in junit.framework has been deprecated” - what next to use?
... that from the build.gradle and build + clean your project.
It is worked for me. Hope it will work for you.
Note: Take a look in the image that I attached in below.
Thank you
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@Resource vs @Autowired
...spring pre-3.0 it doesn't matter which one.
In spring 3.0 there's support for the standard (JSR-330) annotation @javax.inject.Inject - use it, with a combination of @Qualifier. Note that spring now also supports the @javax.inject.Qualifier meta-annotation:
@Qualifier
@Retention(RUNTIME)
public @in...
Loop code for each file in a directory [duplicate]
...o look in a given directory, and loop through each file using some sort of for loop?
5 Answers
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Co-variant array conversion from x to y may cause run-time exception
... of the derived type. The reference is via an array of the base type. Therefore, it is compile time legal to assign an element to it of the base type. Yet the runtime type would not support it.
– Anthony Pegram
Jan 2 '12 at 19:21
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