大约有 40,000 项符合查询结果（耗时：0.0289秒） [XML]
how to prevent “directory already exists error” in a makefile when using mkdir
...
You can use the test command:
test -d $(OBJDIR) || mkdir $(OBJDIR)
share
|
improve this answer
|
follow
...
Abort makefile if variable not set
...abs must precede these lines.
Generic solution
In case you're going to test many variables, it's worth defining an auxiliary function for that:
# Check that given variables are set and all have non-empty values,
# die with an error otherwise.
#
# Params:
# 1. Variable name(s) to test.
# 2. ...
Escape angle brackets in a Windows command prompt
...etlocal disableDelayedExpansion
set "line=<html>"
cmd /v:on /c echo !test!|findstr .
Note that delayed expansion is OFF in the parent batch script.
But all hell breaks loose if delayed expansion is enabled in the parent script. The following does not work:
@echo off
setlocal enableDelayedE...
Is there a difference between YES/NO,TRUE/FALSE and true/false in objective-c?
...hich is why you can evaluate any primitive type or expression as a boolean test (including, e.g. pointers). Note that you should do the former, not the latter.
Note that there is a difference if you assign obtuse values to a so-called BOOL variable and test for specific values, so always use them a...
How to store Node.js deployment settings/configuration files?
...onfig.mongo.db = 'example_dev';
Override the defaults in ./config/config.test.js
var config = require('./config.global');
config.env = 'test';
config.hostname = 'test.example';
config.mongo.db = 'example_test';
module.exports = config;
Using it in ./models/user.js:
var mongoose = require('mo...
How can I return two values from a function in Python?
...
def test():
....
return r1, r2, r3, ....
>> ret_val = test()
>> print ret_val
(r1, r2, r3, ....)
now you can do everything you like with your tuple.
...
What's the difference between utf8_general_ci and utf8_unicode_ci?
...ks myself.
I created a very simple table with 500,000 rows:
CREATE TABLE test(
ID INT(11) DEFAULT NULL,
Description VARCHAR(20) DEFAULT NULL
)
ENGINE = INNODB
CHARACTER SET utf8
COLLATE utf8_general_ci;
Then I filled it with random data by running this stored procedure:
CREATE PROCEDURE ran...
how to convert from int to char*?
...ger64ToCharArray(int64_t value);
https://github.com/JeremyDX/All-Language-Testing-Code/blob/master/C%2B%2B%20Examples/IntegerToCharArrayTesting.cpp
Feel free to try cleaning that code up without hindering performance.
Input: Any signed 64 bit value from min to max range.
Example:
std::cout <...
How to find files that match a wildcard string in Java?
...; i++) {
System.out.println(files[i]);
}
To solve your issue with the TestX folders, I would first iterate through the list of folders:
File[] dirs = new File(".").listFiles(new WildcardFileFilter("Test*.java");
for (int i=0; i<dirs.length; i++) {
File dir = dirs[i];
if (dir.isDirecto...
How to diff one file to an arbitrary version in Git?
...ion 1.7.11 if file is not in current directory. Example: 'git diff f76d078 test/Config' yields "error: Could not access 'test/f76d078'"
– simpleuser
Dec 4 '13 at 21:21
...